/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/array-eq-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9e34d99ae2c6837f487980c721c4b6acf9d9b15c-9e34d99 [2021-07-09 17:09:01,690 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-09 17:09:01,692 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-09 17:09:01,723 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-09 17:09:01,791 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 [2021-07-09 17:09:01,823 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-09 17:09:01,823 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-09 17:09:01,824 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-09 17:09:01,824 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-09 17:09:01,826 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-09 17:09:01,826 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-09 17:09:01,826 INFO L138 SettingsManager]: * Use SBE=true [2021-07-09 17:09:01,826 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-09 17:09:01,826 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-09 17:09:01,827 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-09 17:09:01,827 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-09 17:09:01,827 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-09 17:09:01,827 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-09 17:09:01,827 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-09 17:09:01,828 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-09 17:09:01,828 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-09 17:09:01,828 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-09 17:09:01,828 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-09 17:09:01,828 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-09 17:09:01,828 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-09 17:09:01,828 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-09 17:09:01,828 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-09 17:09:01,828 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-09 17:09:01,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-09 17:09:01,829 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-09 17:09:01,829 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-09 17:09:01,829 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-09 17:09:01,829 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-09 17:09:01,829 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-09 17:09:01,829 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-09 17:09:01,829 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-09 17:09:01,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-09 17:09:02,282 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-09 17:09:02,300 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-09 17:09:02,301 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-09 17:09:02,302 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-09 17:09:02,303 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-09 17:09:02,303 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl [2021-07-09 17:09:02,303 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-symm.wvr.bpl' [2021-07-09 17:09:02,338 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-09 17:09:02,338 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-09 17:09:02,339 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-09 17:09:02,339 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-09 17:09:02,339 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-09 17:09:02,348 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,353 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,358 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-09 17:09:02,359 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-09 17:09:02,359 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-09 17:09:02,359 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-09 17:09:02,364 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,364 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,364 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,364 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,366 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,368 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,369 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/1) ... [2021-07-09 17:09:02,369 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-09 17:09:02,370 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-09 17:09:02,370 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-09 17:09:02,370 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-09 17:09:02,371 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (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 [2021-07-09 17:09:02,420 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-09 17:09:02,420 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-09 17:09:02,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-09 17:09:02,421 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-09 17:09:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-09 17:09:02,421 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-09 17:09:02,421 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-09 17:09:02,421 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-09 17:09:02,422 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-09 17:09:02,422 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-09 17:09:02,531 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-09 17:09:02,532 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-09 17:09:02,533 INFO L202 PluginConnector]: Adding new model array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:09:02 BoogieIcfgContainer [2021-07-09 17:09:02,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-09 17:09:02,534 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-09 17:09:02,534 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-09 17:09:02,536 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-09 17:09:02,536 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 09.07 05:09:02" (1/2) ... [2021-07-09 17:09:02,537 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e0d51a8 and model type array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.07 05:09:02, skipping insertion in model container [2021-07-09 17:09:02,537 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.07 05:09:02" (2/2) ... [2021-07-09 17:09:02,538 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-symm.wvr.bpl [2021-07-09 17:09:02,541 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-09 17:09:02,541 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-09 17:09:02,542 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-09 17:09:02,542 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-09 17:09:02,564 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-07-09 17:09:02,579 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-07-09 17:09:02,591 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-09 17:09:02,591 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-09 17:09:02,591 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-09 17:09:02,591 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-09 17:09:02,591 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-09 17:09:02,591 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-09 17:09:02,592 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-09 17:09:02,592 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-09 17:09:02,597 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 25 transitions, 66 flow [2021-07-09 17:09:02,607 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:02,608 INFO L276 IsEmpty]: Start isEmpty. Operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:02,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-07-09 17:09:02,613 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:02,613 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:02,613 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:02,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:02,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1540416471, now seen corresponding path program 1 times [2021-07-09 17:09:02,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:02,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56915791] [2021-07-09 17:09:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:02,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:02,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:02,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56915791] [2021-07-09 17:09:02,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56915791] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:02,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:02,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-07-09 17:09:02,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517355864] [2021-07-09 17:09:02,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:09:02,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:02,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:09:02,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:09:02,732 INFO L87 Difference]: Start difference. First operand has 53 states, 52 states have (on average 2.2115384615384617) internal successors, (115), 52 states have internal predecessors, (115), 0 states have call successors, (0), 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) [2021-07-09 17:09:02,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:02,806 INFO L93 Difference]: Finished difference Result 102 states and 226 transitions. [2021-07-09 17:09:02,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:09:02,808 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 [2021-07-09 17:09:02,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:02,815 INFO L225 Difference]: With dead ends: 102 [2021-07-09 17:09:02,815 INFO L226 Difference]: Without dead ends: 95 [2021-07-09 17:09:02,816 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:09:02,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-07-09 17:09:02,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2021-07-09 17:09:02,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.2839506172839505) internal successors, (185), 81 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:02,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 185 transitions. [2021-07-09 17:09:02,877 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 185 transitions. Word has length 11 [2021-07-09 17:09:02,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:02,877 INFO L482 AbstractCegarLoop]: Abstraction has 82 states and 185 transitions. [2021-07-09 17:09:02,877 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) [2021-07-09 17:09:02,877 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 185 transitions. [2021-07-09 17:09:02,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:09:02,878 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:02,879 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:02,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-09 17:09:02,879 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:02,880 INFO L82 PathProgramCache]: Analyzing trace with hash -214361416, now seen corresponding path program 1 times [2021-07-09 17:09:02,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:02,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201749783] [2021-07-09 17:09:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:02,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:02,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:02,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201749783] [2021-07-09 17:09:02,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201749783] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:02,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:02,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:09:02,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447683732] [2021-07-09 17:09:02,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:09:02,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:02,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:09:02,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:09:02,933 INFO L87 Difference]: Start difference. First operand 82 states and 185 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:03,031 INFO L93 Difference]: Finished difference Result 160 states and 352 transitions. [2021-07-09 17:09:03,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:03,032 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:09:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:03,039 INFO L225 Difference]: With dead ends: 160 [2021-07-09 17:09:03,039 INFO L226 Difference]: Without dead ends: 160 [2021-07-09 17:09:03,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:03,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-07-09 17:09:03,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2021-07-09 17:09:03,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.3118279569892475) internal successors, (215), 93 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 215 transitions. [2021-07-09 17:09:03,059 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 215 transitions. Word has length 14 [2021-07-09 17:09:03,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:03,060 INFO L482 AbstractCegarLoop]: Abstraction has 94 states and 215 transitions. [2021-07-09 17:09:03,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,060 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 215 transitions. [2021-07-09 17:09:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:09:03,061 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:03,061 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:03,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-07-09 17:09:03,061 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:03,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:03,061 INFO L82 PathProgramCache]: Analyzing trace with hash 110711837, now seen corresponding path program 1 times [2021-07-09 17:09:03,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:03,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527720037] [2021-07-09 17:09:03,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:03,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:03,117 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:03,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:03,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527720037] [2021-07-09 17:09:03,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527720037] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:03,117 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:03,118 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:09:03,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563099562] [2021-07-09 17:09:03,118 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:09:03,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:03,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:09:03,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:09:03,119 INFO L87 Difference]: Start difference. First operand 94 states and 215 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:03,187 INFO L93 Difference]: Finished difference Result 171 states and 385 transitions. [2021-07-09 17:09:03,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:09:03,188 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:09:03,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:03,189 INFO L225 Difference]: With dead ends: 171 [2021-07-09 17:09:03,189 INFO L226 Difference]: Without dead ends: 163 [2021-07-09 17:09:03,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.6ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:03,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-07-09 17:09:03,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 116. [2021-07-09 17:09:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 2.2956521739130435) internal successors, (264), 115 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 264 transitions. [2021-07-09 17:09:03,198 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 264 transitions. Word has length 14 [2021-07-09 17:09:03,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:03,198 INFO L482 AbstractCegarLoop]: Abstraction has 116 states and 264 transitions. [2021-07-09 17:09:03,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,198 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 264 transitions. [2021-07-09 17:09:03,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:09:03,199 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:03,199 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:03,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-07-09 17:09:03,199 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:03,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:03,200 INFO L82 PathProgramCache]: Analyzing trace with hash -632263843, now seen corresponding path program 2 times [2021-07-09 17:09:03,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:03,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364954183] [2021-07-09 17:09:03,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:03,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:03,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:03,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:03,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364954183] [2021-07-09 17:09:03,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364954183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:03,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606543499] [2021-07-09 17:09:03,250 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 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 [2021-07-09 17:09:03,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:03,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:03,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-07-09 17:09:03,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:03,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:03,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606543499] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:03,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:03,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 3 [2021-07-09 17:09:03,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135588572] [2021-07-09 17:09:03,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:09:03,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:03,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:09:03,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:09:03,385 INFO L87 Difference]: Start difference. First operand 116 states and 264 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:03,444 INFO L93 Difference]: Finished difference Result 141 states and 326 transitions. [2021-07-09 17:09:03,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:03,444 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:09:03,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:03,445 INFO L225 Difference]: With dead ends: 141 [2021-07-09 17:09:03,445 INFO L226 Difference]: Without dead ends: 141 [2021-07-09 17:09:03,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.3ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:03,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-07-09 17:09:03,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 103. [2021-07-09 17:09:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.2941176470588234) internal successors, (234), 102 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 234 transitions. [2021-07-09 17:09:03,451 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 234 transitions. Word has length 14 [2021-07-09 17:09:03,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:03,451 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 234 transitions. [2021-07-09 17:09:03,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,452 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 234 transitions. [2021-07-09 17:09:03,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-07-09 17:09:03,452 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:03,452 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:03,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:03,673 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:03,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:03,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1209640048, now seen corresponding path program 2 times [2021-07-09 17:09:03,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:03,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731058492] [2021-07-09 17:09:03,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:03,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:03,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:03,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731058492] [2021-07-09 17:09:03,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731058492] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:03,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:03,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:09:03,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402636053] [2021-07-09 17:09:03,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:09:03,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:03,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:09:03,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:09:03,710 INFO L87 Difference]: Start difference. First operand 103 states and 234 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:03,748 INFO L93 Difference]: Finished difference Result 144 states and 331 transitions. [2021-07-09 17:09:03,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:09:03,748 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-07-09 17:09:03,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:03,749 INFO L225 Difference]: With dead ends: 144 [2021-07-09 17:09:03,749 INFO L226 Difference]: Without dead ends: 142 [2021-07-09 17:09:03,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.0ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:03,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-07-09 17:09:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 103. [2021-07-09 17:09:03,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 2.284313725490196) internal successors, (233), 102 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 233 transitions. [2021-07-09 17:09:03,761 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 233 transitions. Word has length 14 [2021-07-09 17:09:03,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:03,762 INFO L482 AbstractCegarLoop]: Abstraction has 103 states and 233 transitions. [2021-07-09 17:09:03,762 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:03,762 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 233 transitions. [2021-07-09 17:09:03,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:03,763 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:03,766 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:03,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-09 17:09:03,767 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:03,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:03,767 INFO L82 PathProgramCache]: Analyzing trace with hash -10930008, now seen corresponding path program 1 times [2021-07-09 17:09:03,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:03,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797253440] [2021-07-09 17:09:03,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:03,805 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:03,805 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797253440] [2021-07-09 17:09:03,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797253440] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:03,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891043995] [2021-07-09 17:09:03,806 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 [2021-07-09 17:09:03,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:03,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:03,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:03,972 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:03,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891043995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:03,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:03,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4] total 6 [2021-07-09 17:09:03,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468546022] [2021-07-09 17:09:03,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:03,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:03,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:03,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:03,974 INFO L87 Difference]: Start difference. First operand 103 states and 233 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:04,071 INFO L93 Difference]: Finished difference Result 300 states and 674 transitions. [2021-07-09 17:09:04,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:09:04,071 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:09:04,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:04,072 INFO L225 Difference]: With dead ends: 300 [2021-07-09 17:09:04,073 INFO L226 Difference]: Without dead ends: 286 [2021-07-09 17:09:04,073 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 28.8ms TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:04,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-07-09 17:09:04,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 143. [2021-07-09 17:09:04,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 2.352112676056338) internal successors, (334), 142 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 334 transitions. [2021-07-09 17:09:04,079 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 334 transitions. Word has length 17 [2021-07-09 17:09:04,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:04,080 INFO L482 AbstractCegarLoop]: Abstraction has 143 states and 334 transitions. [2021-07-09 17:09:04,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,080 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 334 transitions. [2021-07-09 17:09:04,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:04,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:04,081 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:04,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:04,284 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:04,284 INFO L82 PathProgramCache]: Analyzing trace with hash -1675583288, now seen corresponding path program 1 times [2021-07-09 17:09:04,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:04,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130416324] [2021-07-09 17:09:04,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:04,332 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:04,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:04,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130416324] [2021-07-09 17:09:04,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130416324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:04,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770686870] [2021-07-09 17:09:04,332 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 [2021-07-09 17:09:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:04,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:04,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:04,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:04,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770686870] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:04,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:04,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3] total 6 [2021-07-09 17:09:04,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188435608] [2021-07-09 17:09:04,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:04,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:04,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:04,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:04,412 INFO L87 Difference]: Start difference. First operand 143 states and 334 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:04,474 INFO L93 Difference]: Finished difference Result 248 states and 569 transitions. [2021-07-09 17:09:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:09:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:04,476 INFO L225 Difference]: With dead ends: 248 [2021-07-09 17:09:04,476 INFO L226 Difference]: Without dead ends: 248 [2021-07-09 17:09:04,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 32.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-07-09 17:09:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 194. [2021-07-09 17:09:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 193 states have (on average 2.4248704663212437) internal successors, (468), 193 states have internal predecessors, (468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 468 transitions. [2021-07-09 17:09:04,484 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 468 transitions. Word has length 17 [2021-07-09 17:09:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:04,484 INFO L482 AbstractCegarLoop]: Abstraction has 194 states and 468 transitions. [2021-07-09 17:09:04,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 468 transitions. [2021-07-09 17:09:04,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:04,485 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:04,485 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:04,701 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:04,702 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:04,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:04,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1837184638, now seen corresponding path program 2 times [2021-07-09 17:09:04,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:04,702 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909425516] [2021-07-09 17:09:04,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:04,733 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:04,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:04,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909425516] [2021-07-09 17:09:04,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909425516] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:04,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:04,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:09:04,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088466856] [2021-07-09 17:09:04,734 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:09:04,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:04,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:09:04,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:09:04,735 INFO L87 Difference]: Start difference. First operand 194 states and 468 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:04,769 INFO L93 Difference]: Finished difference Result 311 states and 725 transitions. [2021-07-09 17:09:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:09:04,769 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:09:04,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:04,771 INFO L225 Difference]: With dead ends: 311 [2021-07-09 17:09:04,771 INFO L226 Difference]: Without dead ends: 304 [2021-07-09 17:09:04,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:09:04,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2021-07-09 17:09:04,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 252. [2021-07-09 17:09:04,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 2.4701195219123506) internal successors, (620), 251 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 620 transitions. [2021-07-09 17:09:04,778 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 620 transitions. Word has length 17 [2021-07-09 17:09:04,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:04,778 INFO L482 AbstractCegarLoop]: Abstraction has 252 states and 620 transitions. [2021-07-09 17:09:04,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,778 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 620 transitions. [2021-07-09 17:09:04,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:04,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:04,780 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:04,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-07-09 17:09:04,780 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:04,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:04,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1678798648, now seen corresponding path program 1 times [2021-07-09 17:09:04,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:04,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920692851] [2021-07-09 17:09:04,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:04,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:04,805 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:04,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:04,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920692851] [2021-07-09 17:09:04,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920692851] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:04,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:04,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:09:04,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379370580] [2021-07-09 17:09:04,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-07-09 17:09:04,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:04,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-07-09 17:09:04,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:09:04,807 INFO L87 Difference]: Start difference. First operand 252 states and 620 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:04,834 INFO L93 Difference]: Finished difference Result 243 states and 574 transitions. [2021-07-09 17:09:04,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-09 17:09:04,834 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:09:04,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:04,835 INFO L225 Difference]: With dead ends: 243 [2021-07-09 17:09:04,835 INFO L226 Difference]: Without dead ends: 208 [2021-07-09 17:09:04,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.3ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-07-09 17:09:04,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-07-09 17:09:04,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2021-07-09 17:09:04,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 2.4009661835748792) internal successors, (497), 207 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 497 transitions. [2021-07-09 17:09:04,840 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 497 transitions. Word has length 17 [2021-07-09 17:09:04,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:04,840 INFO L482 AbstractCegarLoop]: Abstraction has 208 states and 497 transitions. [2021-07-09 17:09:04,840 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,840 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 497 transitions. [2021-07-09 17:09:04,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-07-09 17:09:04,841 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:04,841 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:04,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-07-09 17:09:04,841 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:04,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:04,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1963262152, now seen corresponding path program 2 times [2021-07-09 17:09:04,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:04,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348710137] [2021-07-09 17:09:04,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:04,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:04,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:04,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348710137] [2021-07-09 17:09:04,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1348710137] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:04,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:04,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:09:04,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614708768] [2021-07-09 17:09:04,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:04,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:04,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:04,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:04,894 INFO L87 Difference]: Start difference. First operand 208 states and 497 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:04,926 INFO L93 Difference]: Finished difference Result 222 states and 527 transitions. [2021-07-09 17:09:04,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:04,927 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-07-09 17:09:04,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:04,928 INFO L225 Difference]: With dead ends: 222 [2021-07-09 17:09:04,928 INFO L226 Difference]: Without dead ends: 222 [2021-07-09 17:09:04,928 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 36.8ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:04,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-07-09 17:09:04,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2021-07-09 17:09:04,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3846153846153846) internal successors, (527), 221 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 527 transitions. [2021-07-09 17:09:04,933 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 527 transitions. Word has length 17 [2021-07-09 17:09:04,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:04,933 INFO L482 AbstractCegarLoop]: Abstraction has 222 states and 527 transitions. [2021-07-09 17:09:04,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:04,933 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 527 transitions. [2021-07-09 17:09:04,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:04,934 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:04,934 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:04,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-07-09 17:09:04,934 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:04,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:04,935 INFO L82 PathProgramCache]: Analyzing trace with hash 215291064, now seen corresponding path program 3 times [2021-07-09 17:09:04,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:04,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417743558] [2021-07-09 17:09:04,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:04,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:04,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:04,989 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:04,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417743558] [2021-07-09 17:09:04,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417743558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:04,989 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1781463461] [2021-07-09 17:09:04,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:05,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:05,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:05,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:05,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:05,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1781463461] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:05,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 17:09:05,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [5] total 12 [2021-07-09 17:09:05,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790688190] [2021-07-09 17:09:05,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:05,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:05,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:05,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:05,244 INFO L87 Difference]: Start difference. First operand 222 states and 527 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:05,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:05,424 INFO L93 Difference]: Finished difference Result 421 states and 987 transitions. [2021-07-09 17:09:05,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:09:05,425 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:05,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:05,426 INFO L225 Difference]: With dead ends: 421 [2021-07-09 17:09:05,426 INFO L226 Difference]: Without dead ends: 414 [2021-07-09 17:09:05,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 206.2ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:09:05,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-07-09 17:09:05,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 278. [2021-07-09 17:09:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 2.4151624548736463) internal successors, (669), 277 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:05,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 669 transitions. [2021-07-09 17:09:05,433 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 669 transitions. Word has length 20 [2021-07-09 17:09:05,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:05,433 INFO L482 AbstractCegarLoop]: Abstraction has 278 states and 669 transitions. [2021-07-09 17:09:05,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:05,433 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 669 transitions. [2021-07-09 17:09:05,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:05,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:05,434 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:05,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:05,658 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:05,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:05,658 INFO L82 PathProgramCache]: Analyzing trace with hash -2043788104, now seen corresponding path program 4 times [2021-07-09 17:09:05,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:05,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002677473] [2021-07-09 17:09:05,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:05,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:05,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:05,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002677473] [2021-07-09 17:09:05,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002677473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:05,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508637479] [2021-07-09 17:09:05,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:05,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:05,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:05,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-09 17:09:05,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:05,885 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:05,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508637479] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:05,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-09 17:09:05,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [5] total 8 [2021-07-09 17:09:05,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797708301] [2021-07-09 17:09:05,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:05,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:05,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:05,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:05,886 INFO L87 Difference]: Start difference. First operand 278 states and 669 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:06,007 INFO L93 Difference]: Finished difference Result 592 states and 1376 transitions. [2021-07-09 17:09:06,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:06,008 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:06,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:06,010 INFO L225 Difference]: With dead ends: 592 [2021-07-09 17:09:06,010 INFO L226 Difference]: Without dead ends: 592 [2021-07-09 17:09:06,010 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:06,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2021-07-09 17:09:06,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 376. [2021-07-09 17:09:06,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 375 states have (on average 2.541333333333333) internal successors, (953), 375 states have internal predecessors, (953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 953 transitions. [2021-07-09 17:09:06,019 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 953 transitions. Word has length 20 [2021-07-09 17:09:06,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:06,019 INFO L482 AbstractCegarLoop]: Abstraction has 376 states and 953 transitions. [2021-07-09 17:09:06,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 953 transitions. [2021-07-09 17:09:06,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:06,020 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:06,020 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:06,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-09 17:09:06,239 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash -1610963566, now seen corresponding path program 5 times [2021-07-09 17:09:06,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:06,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953833068] [2021-07-09 17:09:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:06,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:06,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:06,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:06,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953833068] [2021-07-09 17:09:06,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953833068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:06,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343597390] [2021-07-09 17:09:06,307 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:06,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:09:06,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:06,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343597390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:06,429 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:06,429 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-09 17:09:06,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425591593] [2021-07-09 17:09:06,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:06,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:06,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:06,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:06,430 INFO L87 Difference]: Start difference. First operand 376 states and 953 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:06,545 INFO L93 Difference]: Finished difference Result 751 states and 1816 transitions. [2021-07-09 17:09:06,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:06,545 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:06,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:06,548 INFO L225 Difference]: With dead ends: 751 [2021-07-09 17:09:06,548 INFO L226 Difference]: Without dead ends: 751 [2021-07-09 17:09:06,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:06,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 751 states. [2021-07-09 17:09:06,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 751 to 527. [2021-07-09 17:09:06,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 526 states have (on average 2.659695817490494) internal successors, (1399), 526 states have internal predecessors, (1399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 1399 transitions. [2021-07-09 17:09:06,577 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 1399 transitions. Word has length 20 [2021-07-09 17:09:06,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:06,577 INFO L482 AbstractCegarLoop]: Abstraction has 527 states and 1399 transitions. [2021-07-09 17:09:06,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,577 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 1399 transitions. [2021-07-09 17:09:06,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:06,579 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:06,579 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:06,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:06,795 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:06,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:06,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1876435461, now seen corresponding path program 6 times [2021-07-09 17:09:06,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:06,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656455404] [2021-07-09 17:09:06,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:06,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:06,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:06,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656455404] [2021-07-09 17:09:06,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656455404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:06,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460373556] [2021-07-09 17:09:06,832 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:06,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-09 17:09:06,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:06,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:06,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:06,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:06,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460373556] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:06,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:06,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-07-09 17:09:06,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358357266] [2021-07-09 17:09:06,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:06,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:06,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:06,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:06,917 INFO L87 Difference]: Start difference. First operand 527 states and 1399 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:06,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:07,000 INFO L93 Difference]: Finished difference Result 960 states and 2485 transitions. [2021-07-09 17:09:07,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:07,000 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:07,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:07,005 INFO L225 Difference]: With dead ends: 960 [2021-07-09 17:09:07,005 INFO L226 Difference]: Without dead ends: 956 [2021-07-09 17:09:07,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:07,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-07-09 17:09:07,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 785. [2021-07-09 17:09:07,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.752551020408163) internal successors, (2158), 784 states have internal predecessors, (2158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:07,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2158 transitions. [2021-07-09 17:09:07,030 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2158 transitions. Word has length 20 [2021-07-09 17:09:07,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:07,030 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2158 transitions. [2021-07-09 17:09:07,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:07,030 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2158 transitions. [2021-07-09 17:09:07,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:07,032 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:07,032 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:07,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:07,256 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:07,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:07,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1254555051, now seen corresponding path program 7 times [2021-07-09 17:09:07,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:07,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640539324] [2021-07-09 17:09:07,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:07,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:07,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640539324] [2021-07-09 17:09:07,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640539324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:07,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510170334] [2021-07-09 17:09:07,289 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:07,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:07,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:07,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510170334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:07,427 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:07,427 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-07-09 17:09:07,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773240473] [2021-07-09 17:09:07,428 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:07,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:07,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:07,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:07,428 INFO L87 Difference]: Start difference. First operand 785 states and 2158 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:07,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:07,512 INFO L93 Difference]: Finished difference Result 966 states and 2482 transitions. [2021-07-09 17:09:07,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:07,512 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:07,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:07,515 INFO L225 Difference]: With dead ends: 966 [2021-07-09 17:09:07,516 INFO L226 Difference]: Without dead ends: 966 [2021-07-09 17:09:07,516 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 37.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:07,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 966 states. [2021-07-09 17:09:07,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 966 to 785. [2021-07-09 17:09:07,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.739795918367347) internal successors, (2148), 784 states have internal predecessors, (2148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:07,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 2148 transitions. [2021-07-09 17:09:07,534 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 2148 transitions. Word has length 20 [2021-07-09 17:09:07,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:07,534 INFO L482 AbstractCegarLoop]: Abstraction has 785 states and 2148 transitions. [2021-07-09 17:09:07,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:07,535 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 2148 transitions. [2021-07-09 17:09:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:07,536 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:07,536 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:07,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-09 17:09:07,755 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:07,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:07,755 INFO L82 PathProgramCache]: Analyzing trace with hash 322738604, now seen corresponding path program 8 times [2021-07-09 17:09:07,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:07,755 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332865335] [2021-07-09 17:09:07,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:07,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:07,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:07,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:07,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332865335] [2021-07-09 17:09:07,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332865335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:07,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656978839] [2021-07-09 17:09:07,781 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 [2021-07-09 17:09:07,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:07,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:07,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:07,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:07,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:07,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656978839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:07,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:07,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:09:07,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235130556] [2021-07-09 17:09:07,949 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:07,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:07,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:07,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:07,950 INFO L87 Difference]: Start difference. First operand 785 states and 2148 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:08,015 INFO L93 Difference]: Finished difference Result 861 states and 2300 transitions. [2021-07-09 17:09:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:08,016 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:08,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:08,033 INFO L225 Difference]: With dead ends: 861 [2021-07-09 17:09:08,033 INFO L226 Difference]: Without dead ends: 858 [2021-07-09 17:09:08,034 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 20.1ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:08,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 858 states. [2021-07-09 17:09:08,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 858 to 781. [2021-07-09 17:09:08,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 2.7346153846153847) internal successors, (2133), 780 states have internal predecessors, (2133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 2133 transitions. [2021-07-09 17:09:08,075 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 2133 transitions. Word has length 20 [2021-07-09 17:09:08,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:08,075 INFO L482 AbstractCegarLoop]: Abstraction has 781 states and 2133 transitions. [2021-07-09 17:09:08,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 2133 transitions. [2021-07-09 17:09:08,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:08,076 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:08,076 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:08,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:08,277 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:08,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:08,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1057166664, now seen corresponding path program 9 times [2021-07-09 17:09:08,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:08,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832496233] [2021-07-09 17:09:08,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:08,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:08,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:08,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832496233] [2021-07-09 17:09:08,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832496233] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:08,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674406505] [2021-07-09 17:09:08,309 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 [2021-07-09 17:09:08,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:08,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:08,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:08,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:08,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:08,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [674406505] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:08,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:08,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:09:08,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511177430] [2021-07-09 17:09:08,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:08,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:08,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:08,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:08,372 INFO L87 Difference]: Start difference. First operand 781 states and 2133 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:08,438 INFO L93 Difference]: Finished difference Result 1114 states and 2914 transitions. [2021-07-09 17:09:08,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:09:08,439 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:08,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:08,443 INFO L225 Difference]: With dead ends: 1114 [2021-07-09 17:09:08,443 INFO L226 Difference]: Without dead ends: 1114 [2021-07-09 17:09:08,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:08,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1114 states. [2021-07-09 17:09:08,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1114 to 899. [2021-07-09 17:09:08,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 899 states, 898 states have (on average 2.771714922048998) internal successors, (2489), 898 states have internal predecessors, (2489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 899 states to 899 states and 2489 transitions. [2021-07-09 17:09:08,461 INFO L78 Accepts]: Start accepts. Automaton has 899 states and 2489 transitions. Word has length 20 [2021-07-09 17:09:08,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:08,461 INFO L482 AbstractCegarLoop]: Abstraction has 899 states and 2489 transitions. [2021-07-09 17:09:08,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,461 INFO L276 IsEmpty]: Start isEmpty. Operand 899 states and 2489 transitions. [2021-07-09 17:09:08,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:08,462 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:08,462 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:08,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-09 17:09:08,679 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:08,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:08,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1634542869, now seen corresponding path program 10 times [2021-07-09 17:09:08,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:08,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095243310] [2021-07-09 17:09:08,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:08,702 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:08,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095243310] [2021-07-09 17:09:08,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095243310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:08,702 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554653664] [2021-07-09 17:09:08,702 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 [2021-07-09 17:09:08,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:08,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:08,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:08,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:08,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:08,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1554653664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:08,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:08,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-07-09 17:09:08,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723814124] [2021-07-09 17:09:08,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:08,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:08,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:08,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:08,781 INFO L87 Difference]: Start difference. First operand 899 states and 2489 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:08,852 INFO L93 Difference]: Finished difference Result 1380 states and 3776 transitions. [2021-07-09 17:09:08,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:09:08,853 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:08,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:08,858 INFO L225 Difference]: With dead ends: 1380 [2021-07-09 17:09:08,858 INFO L226 Difference]: Without dead ends: 1370 [2021-07-09 17:09:08,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 28.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1370 states. [2021-07-09 17:09:08,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1370 to 1228. [2021-07-09 17:09:08,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1228 states, 1227 states have (on average 2.8247758761206194) internal successors, (3466), 1227 states have internal predecessors, (3466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1228 states to 1228 states and 3466 transitions. [2021-07-09 17:09:08,882 INFO L78 Accepts]: Start accepts. Automaton has 1228 states and 3466 transitions. Word has length 20 [2021-07-09 17:09:08,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:08,882 INFO L482 AbstractCegarLoop]: Abstraction has 1228 states and 3466 transitions. [2021-07-09 17:09:08,882 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:08,882 INFO L276 IsEmpty]: Start isEmpty. Operand 1228 states and 3466 transitions. [2021-07-09 17:09:08,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:08,884 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:08,884 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:09,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-09 17:09:09,101 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:09,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:09,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2038544017, now seen corresponding path program 11 times [2021-07-09 17:09:09,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:09,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880385404] [2021-07-09 17:09:09,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:09,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:09,129 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:09,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880385404] [2021-07-09 17:09:09,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880385404] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:09,129 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916836122] [2021-07-09 17:09:09,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:09,202 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-09 17:09:09,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:09,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:09,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:09,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:09,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916836122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:09,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:09,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 5 [2021-07-09 17:09:09,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52600439] [2021-07-09 17:09:09,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:09,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:09,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:09,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:09,244 INFO L87 Difference]: Start difference. First operand 1228 states and 3466 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:09,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:09,336 INFO L93 Difference]: Finished difference Result 1400 states and 3809 transitions. [2021-07-09 17:09:09,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:09,336 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:09,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:09,341 INFO L225 Difference]: With dead ends: 1400 [2021-07-09 17:09:09,342 INFO L226 Difference]: Without dead ends: 1400 [2021-07-09 17:09:09,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:09,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1400 states. [2021-07-09 17:09:09,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1400 to 1248. [2021-07-09 17:09:09,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1248 states, 1247 states have (on average 2.814755412991179) internal successors, (3510), 1247 states have internal predecessors, (3510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:09,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1248 states to 1248 states and 3510 transitions. [2021-07-09 17:09:09,371 INFO L78 Accepts]: Start accepts. Automaton has 1248 states and 3510 transitions. Word has length 20 [2021-07-09 17:09:09,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:09,371 INFO L482 AbstractCegarLoop]: Abstraction has 1248 states and 3510 transitions. [2021-07-09 17:09:09,371 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:09,371 INFO L276 IsEmpty]: Start isEmpty. Operand 1248 states and 3510 transitions. [2021-07-09 17:09:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:09,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:09,373 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:09,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-09 17:09:09,592 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:09,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1106727570, now seen corresponding path program 12 times [2021-07-09 17:09:09,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:09,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461788316] [2021-07-09 17:09:09,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:09,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:09,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:09,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:09,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461788316] [2021-07-09 17:09:09,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461788316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:09,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947227314] [2021-07-09 17:09:09,616 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 [2021-07-09 17:09:09,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-09 17:09:09,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:09,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:09,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:09,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:09,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1947227314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:09,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:09,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:09:09,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981534351] [2021-07-09 17:09:09,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:09,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:09,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:09,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:09,701 INFO L87 Difference]: Start difference. First operand 1248 states and 3510 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:09,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:09,753 INFO L93 Difference]: Finished difference Result 1485 states and 3980 transitions. [2021-07-09 17:09:09,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:09,753 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:09,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:09,758 INFO L225 Difference]: With dead ends: 1485 [2021-07-09 17:09:09,758 INFO L226 Difference]: Without dead ends: 1482 [2021-07-09 17:09:09,758 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 19.6ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:09,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1482 states. [2021-07-09 17:09:09,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1482 to 1250. [2021-07-09 17:09:09,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1250 states, 1249 states have (on average 2.8086469175340274) internal successors, (3508), 1249 states have internal predecessors, (3508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:09,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1250 states to 1250 states and 3508 transitions. [2021-07-09 17:09:09,783 INFO L78 Accepts]: Start accepts. Automaton has 1250 states and 3508 transitions. Word has length 20 [2021-07-09 17:09:09,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:09,783 INFO L482 AbstractCegarLoop]: Abstraction has 1250 states and 3508 transitions. [2021-07-09 17:09:09,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:09,783 INFO L276 IsEmpty]: Start isEmpty. Operand 1250 states and 3508 transitions. [2021-07-09 17:09:09,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:09,784 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:09,785 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:10,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:10,001 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:10,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:10,001 INFO L82 PathProgramCache]: Analyzing trace with hash 400971561, now seen corresponding path program 13 times [2021-07-09 17:09:10,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:10,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088676358] [2021-07-09 17:09:10,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:10,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:10,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:10,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:10,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088676358] [2021-07-09 17:09:10,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2088676358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:10,032 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204746836] [2021-07-09 17:09:10,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:10,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:10,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:10,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:10,093 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:10,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204746836] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:10,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:10,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-09 17:09:10,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105725174] [2021-07-09 17:09:10,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:10,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:10,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:10,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:10,094 INFO L87 Difference]: Start difference. First operand 1250 states and 3508 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:10,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:10,196 INFO L93 Difference]: Finished difference Result 1426 states and 3852 transitions. [2021-07-09 17:09:10,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:10,196 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:10,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:10,201 INFO L225 Difference]: With dead ends: 1426 [2021-07-09 17:09:10,201 INFO L226 Difference]: Without dead ends: 1426 [2021-07-09 17:09:10,201 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1426 states. [2021-07-09 17:09:10,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1426 to 1193. [2021-07-09 17:09:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1193 states, 1192 states have (on average 2.8003355704697985) internal successors, (3338), 1192 states have internal predecessors, (3338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1193 states to 1193 states and 3338 transitions. [2021-07-09 17:09:10,238 INFO L78 Accepts]: Start accepts. Automaton has 1193 states and 3338 transitions. Word has length 20 [2021-07-09 17:09:10,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:10,239 INFO L482 AbstractCegarLoop]: Abstraction has 1193 states and 3338 transitions. [2021-07-09 17:09:10,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 1193 states and 3338 transitions. [2021-07-09 17:09:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-07-09 17:09:10,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:10,240 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:10,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:10,456 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:10,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:10,456 INFO L82 PathProgramCache]: Analyzing trace with hash 1313790136, now seen corresponding path program 14 times [2021-07-09 17:09:10,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:10,456 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770315356] [2021-07-09 17:09:10,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:10,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:10,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:10,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770315356] [2021-07-09 17:09:10,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770315356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:10,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754434780] [2021-07-09 17:09:10,484 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 [2021-07-09 17:09:10,505 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:10,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:10,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-09 17:09:10,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:10,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:10,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754434780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:10,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:10,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:09:10,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068941230] [2021-07-09 17:09:10,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:10,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:10,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:10,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:10,545 INFO L87 Difference]: Start difference. First operand 1193 states and 3338 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:10,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:10,611 INFO L93 Difference]: Finished difference Result 1396 states and 3748 transitions. [2021-07-09 17:09:10,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:10,612 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-07-09 17:09:10,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:10,616 INFO L225 Difference]: With dead ends: 1396 [2021-07-09 17:09:10,616 INFO L226 Difference]: Without dead ends: 1382 [2021-07-09 17:09:10,616 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 31.8ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:10,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1382 states. [2021-07-09 17:09:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1382 to 1217. [2021-07-09 17:09:10,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1217 states, 1216 states have (on average 2.7779605263157894) internal successors, (3378), 1216 states have internal predecessors, (3378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 3378 transitions. [2021-07-09 17:09:10,636 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 3378 transitions. Word has length 20 [2021-07-09 17:09:10,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:10,636 INFO L482 AbstractCegarLoop]: Abstraction has 1217 states and 3378 transitions. [2021-07-09 17:09:10,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 5 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:10,636 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 3378 transitions. [2021-07-09 17:09:10,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:10,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:10,638 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:10,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-09 17:09:10,854 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:10,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:10,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1149983723, now seen corresponding path program 1 times [2021-07-09 17:09:10,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:10,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088528341] [2021-07-09 17:09:10,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:10,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:10,890 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:10,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:10,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088528341] [2021-07-09 17:09:10,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088528341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:10,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412756130] [2021-07-09 17:09:10,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:10,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:10,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:10,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:10,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:10,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412756130] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:10,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:10,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 17:09:10,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863802361] [2021-07-09 17:09:10,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:09:10,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:10,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:09:10,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:10,974 INFO L87 Difference]: Start difference. First operand 1217 states and 3378 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:11,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:11,262 INFO L93 Difference]: Finished difference Result 1620 states and 4189 transitions. [2021-07-09 17:09:11,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:09:11,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:11,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:11,268 INFO L225 Difference]: With dead ends: 1620 [2021-07-09 17:09:11,268 INFO L226 Difference]: Without dead ends: 1620 [2021-07-09 17:09:11,269 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:09:11,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1620 states. [2021-07-09 17:09:11,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1620 to 1363. [2021-07-09 17:09:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1363 states, 1362 states have (on average 2.6908957415565347) internal successors, (3665), 1362 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:11,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1363 states to 1363 states and 3665 transitions. [2021-07-09 17:09:11,291 INFO L78 Accepts]: Start accepts. Automaton has 1363 states and 3665 transitions. Word has length 23 [2021-07-09 17:09:11,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:11,291 INFO L482 AbstractCegarLoop]: Abstraction has 1363 states and 3665 transitions. [2021-07-09 17:09:11,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:11,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1363 states and 3665 transitions. [2021-07-09 17:09:11,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:11,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:11,293 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:11,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:11,509 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:11,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:11,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1870263307, now seen corresponding path program 15 times [2021-07-09 17:09:11,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:11,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042169795] [2021-07-09 17:09:11,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:11,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:11,545 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:11,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:11,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042169795] [2021-07-09 17:09:11,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042169795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:11,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525991839] [2021-07-09 17:09:11,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:11,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:11,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:11,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:11,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:11,607 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:11,607 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525991839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:11,607 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:11,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:09:11,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391121420] [2021-07-09 17:09:11,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:11,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:11,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:11,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:11,608 INFO L87 Difference]: Start difference. First operand 1363 states and 3665 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:11,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:11,674 INFO L93 Difference]: Finished difference Result 1903 states and 5027 transitions. [2021-07-09 17:09:11,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:11,674 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:11,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:11,683 INFO L225 Difference]: With dead ends: 1903 [2021-07-09 17:09:11,683 INFO L226 Difference]: Without dead ends: 1896 [2021-07-09 17:09:11,683 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:11,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1896 states. [2021-07-09 17:09:11,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1896 to 1797. [2021-07-09 17:09:11,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1797 states, 1796 states have (on average 2.693207126948775) internal successors, (4837), 1796 states have internal predecessors, (4837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:11,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1797 states to 1797 states and 4837 transitions. [2021-07-09 17:09:11,760 INFO L78 Accepts]: Start accepts. Automaton has 1797 states and 4837 transitions. Word has length 23 [2021-07-09 17:09:11,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:11,760 INFO L482 AbstractCegarLoop]: Abstraction has 1797 states and 4837 transitions. [2021-07-09 17:09:11,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:11,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1797 states and 4837 transitions. [2021-07-09 17:09:11,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:11,778 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:11,778 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:11,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-09 17:09:11,979 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:11,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:11,979 INFO L82 PathProgramCache]: Analyzing trace with hash -877014541, now seen corresponding path program 16 times [2021-07-09 17:09:11,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:11,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838562398] [2021-07-09 17:09:11,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:11,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:09:12,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:12,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838562398] [2021-07-09 17:09:12,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838562398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:12,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207628299] [2021-07-09 17:09:12,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:09:12,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:12,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:12,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:12,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:09:12,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1207628299] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:12,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:12,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-09 17:09:12,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128273786] [2021-07-09 17:09:12,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:12,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:12,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:12,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:12,091 INFO L87 Difference]: Start difference. First operand 1797 states and 4837 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:12,149 INFO L93 Difference]: Finished difference Result 2099 states and 5565 transitions. [2021-07-09 17:09:12,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:12,150 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:12,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:12,164 INFO L225 Difference]: With dead ends: 2099 [2021-07-09 17:09:12,165 INFO L226 Difference]: Without dead ends: 2092 [2021-07-09 17:09:12,165 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 35.6ms TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:12,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2092 states. [2021-07-09 17:09:12,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2092 to 1863. [2021-07-09 17:09:12,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.700859291084855) internal successors, (5029), 1862 states have internal predecessors, (5029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 5029 transitions. [2021-07-09 17:09:12,246 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 5029 transitions. Word has length 23 [2021-07-09 17:09:12,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:12,247 INFO L482 AbstractCegarLoop]: Abstraction has 1863 states and 5029 transitions. [2021-07-09 17:09:12,247 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,247 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 5029 transitions. [2021-07-09 17:09:12,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:12,250 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:12,250 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:12,465 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-09 17:09:12,465 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:12,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:12,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1516662741, now seen corresponding path program 1 times [2021-07-09 17:09:12,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:12,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513273018] [2021-07-09 17:09:12,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:12,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:12,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513273018] [2021-07-09 17:09:12,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513273018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:12,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203048812] [2021-07-09 17:09:12,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:12,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:12,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:12,636 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:12,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203048812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:12,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:12,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 17:09:12,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362930544] [2021-07-09 17:09:12,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:12,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:12,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:12,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:12,637 INFO L87 Difference]: Start difference. First operand 1863 states and 5029 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:12,787 INFO L93 Difference]: Finished difference Result 1530 states and 4049 transitions. [2021-07-09 17:09:12,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:12,788 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:12,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:12,791 INFO L225 Difference]: With dead ends: 1530 [2021-07-09 17:09:12,791 INFO L226 Difference]: Without dead ends: 1391 [2021-07-09 17:09:12,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 77.3ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:12,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1391 states. [2021-07-09 17:09:12,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1391 to 1357. [2021-07-09 17:09:12,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.7109144542772863) internal successors, (3676), 1356 states have internal predecessors, (3676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 3676 transitions. [2021-07-09 17:09:12,814 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 3676 transitions. Word has length 23 [2021-07-09 17:09:12,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:12,814 INFO L482 AbstractCegarLoop]: Abstraction has 1357 states and 3676 transitions. [2021-07-09 17:09:12,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:12,814 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 3676 transitions. [2021-07-09 17:09:12,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:12,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:12,816 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:13,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-09 17:09:13,033 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:13,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:13,033 INFO L82 PathProgramCache]: Analyzing trace with hash 2072587809, now seen corresponding path program 2 times [2021-07-09 17:09:13,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:13,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112561118] [2021-07-09 17:09:13,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:13,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:13,087 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:13,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112561118] [2021-07-09 17:09:13,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112561118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:13,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349004967] [2021-07-09 17:09:13,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:09:13,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:13,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:13,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:13,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:13,175 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:13,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349004967] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:13,176 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:13,176 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 17:09:13,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995093691] [2021-07-09 17:09:13,176 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:13,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:13,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:13,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:13,177 INFO L87 Difference]: Start difference. First operand 1357 states and 3676 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:13,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:13,337 INFO L93 Difference]: Finished difference Result 1538 states and 4021 transitions. [2021-07-09 17:09:13,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:09:13,337 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:13,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:13,341 INFO L225 Difference]: With dead ends: 1538 [2021-07-09 17:09:13,341 INFO L226 Difference]: Without dead ends: 1538 [2021-07-09 17:09:13,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 84.1ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:13,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1538 states. [2021-07-09 17:09:13,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1538 to 1383. [2021-07-09 17:09:13,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1383 states, 1382 states have (on average 2.703328509406657) internal successors, (3736), 1382 states have internal predecessors, (3736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:13,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1383 states to 1383 states and 3736 transitions. [2021-07-09 17:09:13,370 INFO L78 Accepts]: Start accepts. Automaton has 1383 states and 3736 transitions. Word has length 23 [2021-07-09 17:09:13,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:13,370 INFO L482 AbstractCegarLoop]: Abstraction has 1383 states and 3736 transitions. [2021-07-09 17:09:13,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:13,370 INFO L276 IsEmpty]: Start isEmpty. Operand 1383 states and 3736 transitions. [2021-07-09 17:09:13,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:13,372 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:13,372 INFO L508 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:13,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-09 17:09:13,589 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:13,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1575503784, now seen corresponding path program 2 times [2021-07-09 17:09:13,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:13,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073641686] [2021-07-09 17:09:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:13,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:13,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:13,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073641686] [2021-07-09 17:09:13,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073641686] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:13,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778905630] [2021-07-09 17:09:13,634 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 [2021-07-09 17:09:13,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:13,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:13,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-09 17:09:13,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:13,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:13,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778905630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:13,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:13,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-09 17:09:13,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586747385] [2021-07-09 17:09:13,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:13,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:13,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:13,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:13,744 INFO L87 Difference]: Start difference. First operand 1383 states and 3736 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:13,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:13,832 INFO L93 Difference]: Finished difference Result 1546 states and 4028 transitions. [2021-07-09 17:09:13,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:09:13,832 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:13,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:13,835 INFO L225 Difference]: With dead ends: 1546 [2021-07-09 17:09:13,835 INFO L226 Difference]: Without dead ends: 1526 [2021-07-09 17:09:13,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 50.3ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:13,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2021-07-09 17:09:13,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1395. [2021-07-09 17:09:13,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1395 states, 1394 states have (on average 2.6886657101865135) internal successors, (3748), 1394 states have internal predecessors, (3748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:13,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1395 states to 1395 states and 3748 transitions. [2021-07-09 17:09:13,858 INFO L78 Accepts]: Start accepts. Automaton has 1395 states and 3748 transitions. Word has length 23 [2021-07-09 17:09:13,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:13,858 INFO L482 AbstractCegarLoop]: Abstraction has 1395 states and 3748 transitions. [2021-07-09 17:09:13,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:13,858 INFO L276 IsEmpty]: Start isEmpty. Operand 1395 states and 3748 transitions. [2021-07-09 17:09:13,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:13,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:13,860 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:14,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:14,076 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:14,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:14,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1556804075, now seen corresponding path program 3 times [2021-07-09 17:09:14,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:14,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620203695] [2021-07-09 17:09:14,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:14,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:14,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620203695] [2021-07-09 17:09:14,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620203695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:14,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156736210] [2021-07-09 17:09:14,125 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 [2021-07-09 17:09:14,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:14,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:14,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:14,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:14,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:14,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156736210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:14,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:14,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 17:09:14,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235169957] [2021-07-09 17:09:14,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:14,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:14,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:14,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:14,221 INFO L87 Difference]: Start difference. First operand 1395 states and 3748 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:14,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:14,376 INFO L93 Difference]: Finished difference Result 1913 states and 4928 transitions. [2021-07-09 17:09:14,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:09:14,377 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:14,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:14,380 INFO L225 Difference]: With dead ends: 1913 [2021-07-09 17:09:14,380 INFO L226 Difference]: Without dead ends: 1913 [2021-07-09 17:09:14,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 75.9ms TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:14,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1913 states. [2021-07-09 17:09:14,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1913 to 1544. [2021-07-09 17:09:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1543 states have (on average 2.6824368114063515) internal successors, (4139), 1543 states have internal predecessors, (4139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:14,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 4139 transitions. [2021-07-09 17:09:14,409 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 4139 transitions. Word has length 23 [2021-07-09 17:09:14,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:14,409 INFO L482 AbstractCegarLoop]: Abstraction has 1544 states and 4139 transitions. [2021-07-09 17:09:14,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:14,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 4139 transitions. [2021-07-09 17:09:14,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:14,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:14,415 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:14,629 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:14,629 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:14,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:14,629 INFO L82 PathProgramCache]: Analyzing trace with hash -56471083, now seen corresponding path program 3 times [2021-07-09 17:09:14,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:14,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958334181] [2021-07-09 17:09:14,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:14,688 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:14,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:14,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958334181] [2021-07-09 17:09:14,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958334181] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:09:14,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:09:14,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-09 17:09:14,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558566580] [2021-07-09 17:09:14,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-09 17:09:14,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:14,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-09 17:09:14,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:14,690 INFO L87 Difference]: Start difference. First operand 1544 states and 4139 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:14,738 INFO L93 Difference]: Finished difference Result 1492 states and 3879 transitions. [2021-07-09 17:09:14,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-09 17:09:14,738 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:14,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:14,741 INFO L225 Difference]: With dead ends: 1492 [2021-07-09 17:09:14,741 INFO L226 Difference]: Without dead ends: 1411 [2021-07-09 17:09:14,741 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 40.3ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-09 17:09:14,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1411 states. [2021-07-09 17:09:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1411 to 1381. [2021-07-09 17:09:14,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 2.6231884057971016) internal successors, (3620), 1380 states have internal predecessors, (3620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:14,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 3620 transitions. [2021-07-09 17:09:14,764 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 3620 transitions. Word has length 23 [2021-07-09 17:09:14,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:14,764 INFO L482 AbstractCegarLoop]: Abstraction has 1381 states and 3620 transitions. [2021-07-09 17:09:14,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 4 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:14,764 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 3620 transitions. [2021-07-09 17:09:14,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:14,766 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:14,766 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:14,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-07-09 17:09:14,766 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:14,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:14,766 INFO L82 PathProgramCache]: Analyzing trace with hash -670007263, now seen corresponding path program 4 times [2021-07-09 17:09:14,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:14,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615475390] [2021-07-09 17:09:14,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:14,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:14,807 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:14,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:14,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615475390] [2021-07-09 17:09:14,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615475390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:14,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130470270] [2021-07-09 17:09:14,808 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 [2021-07-09 17:09:14,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:14,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:14,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:14,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:14,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:14,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130470270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:14,923 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:14,923 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 17:09:14,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47164857] [2021-07-09 17:09:14,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:14,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:14,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:14,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:14,924 INFO L87 Difference]: Start difference. First operand 1381 states and 3620 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:15,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:15,089 INFO L93 Difference]: Finished difference Result 1624 states and 4116 transitions. [2021-07-09 17:09:15,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:09:15,089 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:15,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:15,092 INFO L225 Difference]: With dead ends: 1624 [2021-07-09 17:09:15,092 INFO L226 Difference]: Without dead ends: 1612 [2021-07-09 17:09:15,092 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:15,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1612 states. [2021-07-09 17:09:15,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1612 to 1413. [2021-07-09 17:09:15,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1413 states, 1412 states have (on average 2.6203966005665724) internal successors, (3700), 1412 states have internal predecessors, (3700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:15,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1413 states to 1413 states and 3700 transitions. [2021-07-09 17:09:15,115 INFO L78 Accepts]: Start accepts. Automaton has 1413 states and 3700 transitions. Word has length 23 [2021-07-09 17:09:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:15,115 INFO L482 AbstractCegarLoop]: Abstraction has 1413 states and 3700 transitions. [2021-07-09 17:09:15,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:15,116 INFO L276 IsEmpty]: Start isEmpty. Operand 1413 states and 3700 transitions. [2021-07-09 17:09:15,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:15,117 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:15,118 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:15,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-07-09 17:09:15,334 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:15,335 INFO L82 PathProgramCache]: Analyzing trace with hash -819089257, now seen corresponding path program 17 times [2021-07-09 17:09:15,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:15,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512991231] [2021-07-09 17:09:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:15,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:15,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512991231] [2021-07-09 17:09:15,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512991231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:15,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651705771] [2021-07-09 17:09:15,364 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 [2021-07-09 17:09:15,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:09:15,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:15,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:15,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:15,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651705771] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:15,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:15,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 9] total 11 [2021-07-09 17:09:15,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197480535] [2021-07-09 17:09:15,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:09:15,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:15,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:09:15,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:15,537 INFO L87 Difference]: Start difference. First operand 1413 states and 3700 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:15,999 INFO L93 Difference]: Finished difference Result 2940 states and 7390 transitions. [2021-07-09 17:09:15,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:09:15,999 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:16,004 INFO L225 Difference]: With dead ends: 2940 [2021-07-09 17:09:16,005 INFO L226 Difference]: Without dead ends: 2926 [2021-07-09 17:09:16,005 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=161, Invalid=439, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:09:16,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2926 states. [2021-07-09 17:09:16,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2926 to 1583. [2021-07-09 17:09:16,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1583 states, 1582 states have (on average 2.618204804045512) internal successors, (4142), 1582 states have internal predecessors, (4142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1583 states to 1583 states and 4142 transitions. [2021-07-09 17:09:16,039 INFO L78 Accepts]: Start accepts. Automaton has 1583 states and 4142 transitions. Word has length 23 [2021-07-09 17:09:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:16,040 INFO L482 AbstractCegarLoop]: Abstraction has 1583 states and 4142 transitions. [2021-07-09 17:09:16,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 1583 states and 4142 transitions. [2021-07-09 17:09:16,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:16,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:16,042 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:16,259 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:16,259 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:16,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:16,259 INFO L82 PathProgramCache]: Analyzing trace with hash 1471910071, now seen corresponding path program 5 times [2021-07-09 17:09:16,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:16,259 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194607202] [2021-07-09 17:09:16,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:16,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:16,292 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:16,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:16,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194607202] [2021-07-09 17:09:16,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194607202] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:16,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143655698] [2021-07-09 17:09:16,293 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 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 [2021-07-09 17:09:16,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:09:16,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:16,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:16,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:16,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143655698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:16,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:16,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-07-09 17:09:16,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458496699] [2021-07-09 17:09:16,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:09:16,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:16,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:09:16,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:16,378 INFO L87 Difference]: Start difference. First operand 1583 states and 4142 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:16,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:16,659 INFO L93 Difference]: Finished difference Result 1758 states and 4409 transitions. [2021-07-09 17:09:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:09:16,660 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:16,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:16,662 INFO L225 Difference]: With dead ends: 1758 [2021-07-09 17:09:16,662 INFO L226 Difference]: Without dead ends: 1746 [2021-07-09 17:09:16,663 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 156.8ms TimeCoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:09:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-07-09 17:09:16,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1437. [2021-07-09 17:09:16,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1437 states, 1436 states have (on average 2.597493036211699) internal successors, (3730), 1436 states have internal predecessors, (3730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:16,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1437 states to 1437 states and 3730 transitions. [2021-07-09 17:09:16,684 INFO L78 Accepts]: Start accepts. Automaton has 1437 states and 3730 transitions. Word has length 23 [2021-07-09 17:09:16,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:16,684 INFO L482 AbstractCegarLoop]: Abstraction has 1437 states and 3730 transitions. [2021-07-09 17:09:16,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:16,684 INFO L276 IsEmpty]: Start isEmpty. Operand 1437 states and 3730 transitions. [2021-07-09 17:09:16,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-07-09 17:09:16,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:16,686 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:16,903 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-09 17:09:16,903 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:16,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:16,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1618050889, now seen corresponding path program 4 times [2021-07-09 17:09:16,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:16,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926257292] [2021-07-09 17:09:16,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:16,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:16,956 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:16,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:16,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926257292] [2021-07-09 17:09:16,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926257292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:16,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174752486] [2021-07-09 17:09:16,957 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:16,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:16,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:16,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:16,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:17,037 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:17,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174752486] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:17,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:17,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-07-09 17:09:17,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361676655] [2021-07-09 17:09:17,039 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:17,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:17,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:17,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:17,039 INFO L87 Difference]: Start difference. First operand 1437 states and 3730 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:17,175 INFO L93 Difference]: Finished difference Result 1432 states and 3672 transitions. [2021-07-09 17:09:17,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:17,176 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-07-09 17:09:17,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:17,178 INFO L225 Difference]: With dead ends: 1432 [2021-07-09 17:09:17,178 INFO L226 Difference]: Without dead ends: 1365 [2021-07-09 17:09:17,178 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:17,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1365 states. [2021-07-09 17:09:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1365 to 1356. [2021-07-09 17:09:17,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1356 states, 1355 states have (on average 2.607380073800738) internal successors, (3533), 1355 states have internal predecessors, (3533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1356 states to 1356 states and 3533 transitions. [2021-07-09 17:09:17,196 INFO L78 Accepts]: Start accepts. Automaton has 1356 states and 3533 transitions. Word has length 23 [2021-07-09 17:09:17,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:17,196 INFO L482 AbstractCegarLoop]: Abstraction has 1356 states and 3533 transitions. [2021-07-09 17:09:17,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,196 INFO L276 IsEmpty]: Start isEmpty. Operand 1356 states and 3533 transitions. [2021-07-09 17:09:17,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:17,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:17,198 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:17,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:17,413 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:17,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:17,413 INFO L82 PathProgramCache]: Analyzing trace with hash 2131794949, now seen corresponding path program 18 times [2021-07-09 17:09:17,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:17,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793239412] [2021-07-09 17:09:17,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:17,457 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:17,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:17,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793239412] [2021-07-09 17:09:17,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793239412] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:17,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042593480] [2021-07-09 17:09:17,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:17,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:09:17,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:17,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:17,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:17,523 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:17,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042593480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:17,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:17,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:09:17,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941285940] [2021-07-09 17:09:17,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:17,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:17,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:17,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:17,525 INFO L87 Difference]: Start difference. First operand 1356 states and 3533 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:17,667 INFO L93 Difference]: Finished difference Result 1715 states and 4244 transitions. [2021-07-09 17:09:17,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:17,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:17,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:17,670 INFO L225 Difference]: With dead ends: 1715 [2021-07-09 17:09:17,670 INFO L226 Difference]: Without dead ends: 1715 [2021-07-09 17:09:17,670 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:17,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1715 states. [2021-07-09 17:09:17,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1715 to 1404. [2021-07-09 17:09:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1404 states, 1403 states have (on average 2.6129722024233786) internal successors, (3666), 1403 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1404 states to 1404 states and 3666 transitions. [2021-07-09 17:09:17,725 INFO L78 Accepts]: Start accepts. Automaton has 1404 states and 3666 transitions. Word has length 26 [2021-07-09 17:09:17,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:17,725 INFO L482 AbstractCegarLoop]: Abstraction has 1404 states and 3666 transitions. [2021-07-09 17:09:17,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:17,725 INFO L276 IsEmpty]: Start isEmpty. Operand 1404 states and 3666 transitions. [2021-07-09 17:09:17,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:17,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:17,728 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:17,928 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-07-09 17:09:17,928 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:17,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:17,929 INFO L82 PathProgramCache]: Analyzing trace with hash 761307032, now seen corresponding path program 19 times [2021-07-09 17:09:17,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:17,929 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265462588] [2021-07-09 17:09:17,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:17,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:17,968 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:17,968 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:17,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265462588] [2021-07-09 17:09:17,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265462588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:17,968 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238995696] [2021-07-09 17:09:17,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:18,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:18,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:18,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:18,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238995696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:18,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:18,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-09 17:09:18,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592223133] [2021-07-09 17:09:18,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:18,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:18,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:18,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:18,060 INFO L87 Difference]: Start difference. First operand 1404 states and 3666 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:18,153 INFO L93 Difference]: Finished difference Result 2473 states and 6334 transitions. [2021-07-09 17:09:18,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:18,153 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:18,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:18,157 INFO L225 Difference]: With dead ends: 2473 [2021-07-09 17:09:18,157 INFO L226 Difference]: Without dead ends: 2455 [2021-07-09 17:09:18,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:18,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2455 states. [2021-07-09 17:09:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2455 to 2018. [2021-07-09 17:09:18,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2018 states, 2017 states have (on average 2.707982151710461) internal successors, (5462), 2017 states have internal predecessors, (5462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2018 states to 2018 states and 5462 transitions. [2021-07-09 17:09:18,192 INFO L78 Accepts]: Start accepts. Automaton has 2018 states and 5462 transitions. Word has length 26 [2021-07-09 17:09:18,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:18,192 INFO L482 AbstractCegarLoop]: Abstraction has 2018 states and 5462 transitions. [2021-07-09 17:09:18,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,192 INFO L276 IsEmpty]: Start isEmpty. Operand 2018 states and 5462 transitions. [2021-07-09 17:09:18,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:18,195 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:18,195 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:18,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:18,412 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:18,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:18,412 INFO L82 PathProgramCache]: Analyzing trace with hash -195885608, now seen corresponding path program 20 times [2021-07-09 17:09:18,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:18,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191569182] [2021-07-09 17:09:18,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:18,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:18,445 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:18,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:18,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191569182] [2021-07-09 17:09:18,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191569182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:18,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807865519] [2021-07-09 17:09:18,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:18,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:18,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:18,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:18,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:18,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807865519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:18,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:18,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-09 17:09:18,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486798865] [2021-07-09 17:09:18,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:18,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:18,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:18,536 INFO L87 Difference]: Start difference. First operand 2018 states and 5462 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:18,656 INFO L93 Difference]: Finished difference Result 2447 states and 6260 transitions. [2021-07-09 17:09:18,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:18,656 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:18,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:18,660 INFO L225 Difference]: With dead ends: 2447 [2021-07-09 17:09:18,660 INFO L226 Difference]: Without dead ends: 2447 [2021-07-09 17:09:18,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:18,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2447 states. [2021-07-09 17:09:18,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2447 to 1914. [2021-07-09 17:09:18,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1914 states, 1913 states have (on average 2.6905384213277577) internal successors, (5147), 1913 states have internal predecessors, (5147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1914 states to 1914 states and 5147 transitions. [2021-07-09 17:09:18,690 INFO L78 Accepts]: Start accepts. Automaton has 1914 states and 5147 transitions. Word has length 26 [2021-07-09 17:09:18,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:18,690 INFO L482 AbstractCegarLoop]: Abstraction has 1914 states and 5147 transitions. [2021-07-09 17:09:18,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:18,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1914 states and 5147 transitions. [2021-07-09 17:09:18,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:18,692 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:18,692 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:18,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-09 17:09:18,908 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:18,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:18,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1127702055, now seen corresponding path program 21 times [2021-07-09 17:09:18,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:18,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575197578] [2021-07-09 17:09:18,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:18,935 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:18,935 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:18,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575197578] [2021-07-09 17:09:18,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575197578] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:18,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845276492] [2021-07-09 17:09:18,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:19,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:19,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:19,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:19,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:19,061 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:19,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845276492] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:19,062 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:19,062 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:09:19,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573819640] [2021-07-09 17:09:19,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:19,063 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:19,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:19,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:19,064 INFO L87 Difference]: Start difference. First operand 1914 states and 5147 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) [2021-07-09 17:09:19,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:19,134 INFO L93 Difference]: Finished difference Result 2092 states and 5497 transitions. [2021-07-09 17:09:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:09:19,134 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 [2021-07-09 17:09:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:19,137 INFO L225 Difference]: With dead ends: 2092 [2021-07-09 17:09:19,137 INFO L226 Difference]: Without dead ends: 2089 [2021-07-09 17:09:19,138 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 29.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2021-07-09 17:09:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 1899. [2021-07-09 17:09:19,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1899 states, 1898 states have (on average 2.684931506849315) internal successors, (5096), 1898 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:19,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1899 states to 1899 states and 5096 transitions. [2021-07-09 17:09:19,184 INFO L78 Accepts]: Start accepts. Automaton has 1899 states and 5096 transitions. Word has length 26 [2021-07-09 17:09:19,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:19,184 INFO L482 AbstractCegarLoop]: Abstraction has 1899 states and 5096 transitions. [2021-07-09 17:09:19,184 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) [2021-07-09 17:09:19,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1899 states and 5096 transitions. [2021-07-09 17:09:19,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:19,186 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:19,186 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:19,402 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:19,403 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:19,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:19,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1111998297, now seen corresponding path program 22 times [2021-07-09 17:09:19,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:19,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381067920] [2021-07-09 17:09:19,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:19,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:19,442 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:19,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:19,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381067920] [2021-07-09 17:09:19,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381067920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:19,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471230248] [2021-07-09 17:09:19,442 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:19,467 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:19,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:19,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:19,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:19,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471230248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:19,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:19,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:09:19,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553482500] [2021-07-09 17:09:19,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:19,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:19,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:19,514 INFO L87 Difference]: Start difference. First operand 1899 states and 5096 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:19,606 INFO L93 Difference]: Finished difference Result 2552 states and 6599 transitions. [2021-07-09 17:09:19,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:19,607 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:19,611 INFO L225 Difference]: With dead ends: 2552 [2021-07-09 17:09:19,611 INFO L226 Difference]: Without dead ends: 2552 [2021-07-09 17:09:19,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.2ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:19,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2552 states. [2021-07-09 17:09:19,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2552 to 2092. [2021-07-09 17:09:19,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2092 states, 2091 states have (on average 2.713534194165471) internal successors, (5674), 2091 states have internal predecessors, (5674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2092 states to 2092 states and 5674 transitions. [2021-07-09 17:09:19,646 INFO L78 Accepts]: Start accepts. Automaton has 2092 states and 5674 transitions. Word has length 26 [2021-07-09 17:09:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:19,646 INFO L482 AbstractCegarLoop]: Abstraction has 2092 states and 5674 transitions. [2021-07-09 17:09:19,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:19,646 INFO L276 IsEmpty]: Start isEmpty. Operand 2092 states and 5674 transitions. [2021-07-09 17:09:19,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:19,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:19,650 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:19,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-07-09 17:09:19,866 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:19,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:19,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1689374502, now seen corresponding path program 23 times [2021-07-09 17:09:19,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:19,867 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616041524] [2021-07-09 17:09:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:19,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:19,892 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:19,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:19,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616041524] [2021-07-09 17:09:19,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616041524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:19,893 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96482480] [2021-07-09 17:09:19,893 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:19,916 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:09:19,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:19,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:19,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:19,960 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:19,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96482480] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:19,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:19,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-07-09 17:09:19,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618674205] [2021-07-09 17:09:19,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:19,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:19,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:19,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:19,961 INFO L87 Difference]: Start difference. First operand 2092 states and 5674 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:20,062 INFO L93 Difference]: Finished difference Result 3728 states and 10027 transitions. [2021-07-09 17:09:20,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:20,063 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:20,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:20,069 INFO L225 Difference]: With dead ends: 3728 [2021-07-09 17:09:20,069 INFO L226 Difference]: Without dead ends: 3712 [2021-07-09 17:09:20,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 38.4ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:20,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3712 states. [2021-07-09 17:09:20,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3712 to 3201. [2021-07-09 17:09:20,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.8134375) internal successors, (9003), 3200 states have internal predecessors, (9003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 9003 transitions. [2021-07-09 17:09:20,125 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 9003 transitions. Word has length 26 [2021-07-09 17:09:20,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:20,126 INFO L482 AbstractCegarLoop]: Abstraction has 3201 states and 9003 transitions. [2021-07-09 17:09:20,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 9003 transitions. [2021-07-09 17:09:20,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:20,129 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:20,129 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:20,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-07-09 17:09:20,344 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1983712384, now seen corresponding path program 24 times [2021-07-09 17:09:20,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:20,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710159779] [2021-07-09 17:09:20,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:20,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:20,374 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:20,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:20,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710159779] [2021-07-09 17:09:20,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710159779] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:20,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908317098] [2021-07-09 17:09:20,374 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:20,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:09:20,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:20,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:20,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:20,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908317098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:20,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:20,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-07-09 17:09:20,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928518301] [2021-07-09 17:09:20,445 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:20,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:20,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:20,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:20,445 INFO L87 Difference]: Start difference. First operand 3201 states and 9003 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:20,586 INFO L93 Difference]: Finished difference Result 3830 states and 10240 transitions. [2021-07-09 17:09:20,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:20,587 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:20,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:20,593 INFO L225 Difference]: With dead ends: 3830 [2021-07-09 17:09:20,593 INFO L226 Difference]: Without dead ends: 3830 [2021-07-09 17:09:20,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:20,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3830 states. [2021-07-09 17:09:20,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3830 to 3216. [2021-07-09 17:09:20,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3216 states, 3215 states have (on average 2.805909797822706) internal successors, (9021), 3215 states have internal predecessors, (9021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3216 states to 3216 states and 9021 transitions. [2021-07-09 17:09:20,652 INFO L78 Accepts]: Start accepts. Automaton has 3216 states and 9021 transitions. Word has length 26 [2021-07-09 17:09:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:20,653 INFO L482 AbstractCegarLoop]: Abstraction has 3216 states and 9021 transitions. [2021-07-09 17:09:20,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:20,653 INFO L276 IsEmpty]: Start isEmpty. Operand 3216 states and 9021 transitions. [2021-07-09 17:09:20,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:20,656 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:20,656 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:20,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:20,873 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:20,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:20,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1051895937, now seen corresponding path program 25 times [2021-07-09 17:09:20,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:20,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185030254] [2021-07-09 17:09:20,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:20,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:20,900 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:20,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:20,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185030254] [2021-07-09 17:09:20,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185030254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:20,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072937986] [2021-07-09 17:09:20,903 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:20,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:20,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:20,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072937986] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:20,974 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:20,975 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:09:20,975 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836114295] [2021-07-09 17:09:20,975 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:20,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:20,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:20,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:20,975 INFO L87 Difference]: Start difference. First operand 3216 states and 9021 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:21,065 INFO L93 Difference]: Finished difference Result 3629 states and 9839 transitions. [2021-07-09 17:09:21,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:09:21,066 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:21,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:21,071 INFO L225 Difference]: With dead ends: 3629 [2021-07-09 17:09:21,071 INFO L226 Difference]: Without dead ends: 3617 [2021-07-09 17:09:21,071 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 29.1ms TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:21,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3617 states. [2021-07-09 17:09:21,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3617 to 3079. [2021-07-09 17:09:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3079 states, 3078 states have (on average 2.7979207277452893) internal successors, (8612), 3078 states have internal predecessors, (8612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3079 states to 3079 states and 8612 transitions. [2021-07-09 17:09:21,122 INFO L78 Accepts]: Start accepts. Automaton has 3079 states and 8612 transitions. Word has length 26 [2021-07-09 17:09:21,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:21,122 INFO L482 AbstractCegarLoop]: Abstraction has 3079 states and 8612 transitions. [2021-07-09 17:09:21,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3079 states and 8612 transitions. [2021-07-09 17:09:21,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:21,125 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:21,125 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:21,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-09 17:09:21,329 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:21,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:21,329 INFO L82 PathProgramCache]: Analyzing trace with hash 346139928, now seen corresponding path program 26 times [2021-07-09 17:09:21,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:21,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316557969] [2021-07-09 17:09:21,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:21,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:21,379 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:21,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:21,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316557969] [2021-07-09 17:09:21,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316557969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:21,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362325033] [2021-07-09 17:09:21,379 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:21,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:21,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:21,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:21,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:21,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:21,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362325033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:21,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:21,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-09 17:09:21,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710747924] [2021-07-09 17:09:21,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:21,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:21,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:21,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:21,497 INFO L87 Difference]: Start difference. First operand 3079 states and 8612 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:21,647 INFO L93 Difference]: Finished difference Result 4208 states and 11364 transitions. [2021-07-09 17:09:21,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:21,647 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:21,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:21,655 INFO L225 Difference]: With dead ends: 4208 [2021-07-09 17:09:21,656 INFO L226 Difference]: Without dead ends: 4208 [2021-07-09 17:09:21,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 59.0ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:21,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-07-09 17:09:21,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3506. [2021-07-09 17:09:21,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 2.8185449358059915) internal successors, (9879), 3505 states have internal predecessors, (9879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 9879 transitions. [2021-07-09 17:09:21,712 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 9879 transitions. Word has length 26 [2021-07-09 17:09:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:21,712 INFO L482 AbstractCegarLoop]: Abstraction has 3506 states and 9879 transitions. [2021-07-09 17:09:21,712 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 9879 transitions. [2021-07-09 17:09:21,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:21,716 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:21,716 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:21,918 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:21,918 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:21,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:21,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1258958503, now seen corresponding path program 27 times [2021-07-09 17:09:21,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:21,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022398716] [2021-07-09 17:09:21,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:21,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:21,962 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:21,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022398716] [2021-07-09 17:09:21,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022398716] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:21,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807518846] [2021-07-09 17:09:21,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:22,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:22,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:22,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:22,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:22,052 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:22,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1807518846] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:22,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:22,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:09:22,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590273922] [2021-07-09 17:09:22,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:22,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:22,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:22,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:22,054 INFO L87 Difference]: Start difference. First operand 3506 states and 9879 transitions. Second operand has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:22,165 INFO L93 Difference]: Finished difference Result 3876 states and 10634 transitions. [2021-07-09 17:09:22,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:22,166 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:22,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:22,172 INFO L225 Difference]: With dead ends: 3876 [2021-07-09 17:09:22,172 INFO L226 Difference]: Without dead ends: 3864 [2021-07-09 17:09:22,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:22,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3864 states. [2021-07-09 17:09:22,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3864 to 3527. [2021-07-09 17:09:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3527 states, 3526 states have (on average 2.811401020986954) internal successors, (9913), 3526 states have internal predecessors, (9913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3527 states to 3527 states and 9913 transitions. [2021-07-09 17:09:22,227 INFO L78 Accepts]: Start accepts. Automaton has 3527 states and 9913 transitions. Word has length 26 [2021-07-09 17:09:22,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:22,227 INFO L482 AbstractCegarLoop]: Abstraction has 3527 states and 9913 transitions. [2021-07-09 17:09:22,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 6 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,227 INFO L276 IsEmpty]: Start isEmpty. Operand 3527 states and 9913 transitions. [2021-07-09 17:09:22,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:22,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:22,230 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:22,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-07-09 17:09:22,446 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:22,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:22,447 INFO L82 PathProgramCache]: Analyzing trace with hash -1264613717, now seen corresponding path program 28 times [2021-07-09 17:09:22,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:22,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043442508] [2021-07-09 17:09:22,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:22,485 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:22,486 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:22,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043442508] [2021-07-09 17:09:22,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043442508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:22,486 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046086934] [2021-07-09 17:09:22,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:22,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:22,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:22,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:09:22,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:22,580 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:22,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046086934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:22,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:22,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-09 17:09:22,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483521845] [2021-07-09 17:09:22,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:22,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:22,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:22,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=53, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:22,581 INFO L87 Difference]: Start difference. First operand 3527 states and 9913 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) [2021-07-09 17:09:22,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:22,771 INFO L93 Difference]: Finished difference Result 4288 states and 11605 transitions. [2021-07-09 17:09:22,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:09:22,771 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 26 [2021-07-09 17:09:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:22,778 INFO L225 Difference]: With dead ends: 4288 [2021-07-09 17:09:22,778 INFO L226 Difference]: Without dead ends: 4288 [2021-07-09 17:09:22,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 88.9ms TimeCoverageRelationStatistics Valid=77, Invalid=105, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:22,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4288 states. [2021-07-09 17:09:22,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4288 to 3636. [2021-07-09 17:09:22,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 2.817881705639615) internal successors, (10243), 3635 states have internal predecessors, (10243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:22,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 10243 transitions. [2021-07-09 17:09:22,851 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 10243 transitions. Word has length 26 [2021-07-09 17:09:22,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:22,851 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 10243 transitions. [2021-07-09 17:09:22,851 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) [2021-07-09 17:09:22,852 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 10243 transitions. [2021-07-09 17:09:22,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:22,855 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:22,855 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:23,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-09 17:09:23,071 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:23,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:23,071 INFO L82 PathProgramCache]: Analyzing trace with hash -535116392, now seen corresponding path program 29 times [2021-07-09 17:09:23,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:23,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820782682] [2021-07-09 17:09:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:23,104 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:23,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:23,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820782682] [2021-07-09 17:09:23,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820782682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:23,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257672629] [2021-07-09 17:09:23,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:23,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:09:23,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:23,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:23,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:23,174 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:23,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [257672629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:23,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:23,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-07-09 17:09:23,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046728548] [2021-07-09 17:09:23,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:23,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:23,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:23,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:23,175 INFO L87 Difference]: Start difference. First operand 3636 states and 10243 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:23,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:23,307 INFO L93 Difference]: Finished difference Result 4890 states and 13623 transitions. [2021-07-09 17:09:23,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:23,308 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:23,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:23,316 INFO L225 Difference]: With dead ends: 4890 [2021-07-09 17:09:23,316 INFO L226 Difference]: Without dead ends: 4858 [2021-07-09 17:09:23,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.6ms TimeCoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:23,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4858 states. [2021-07-09 17:09:23,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4858 to 4449. [2021-07-09 17:09:23,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4449 states, 4448 states have (on average 2.8424010791366907) internal successors, (12643), 4448 states have internal predecessors, (12643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:23,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4449 states to 4449 states and 12643 transitions. [2021-07-09 17:09:23,390 INFO L78 Accepts]: Start accepts. Automaton has 4449 states and 12643 transitions. Word has length 26 [2021-07-09 17:09:23,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:23,390 INFO L482 AbstractCegarLoop]: Abstraction has 4449 states and 12643 transitions. [2021-07-09 17:09:23,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:23,390 INFO L276 IsEmpty]: Start isEmpty. Operand 4449 states and 12643 transitions. [2021-07-09 17:09:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:23,394 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:23,394 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:23,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:23,610 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:23,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:23,610 INFO L82 PathProgramCache]: Analyzing trace with hash -2036715645, now seen corresponding path program 30 times [2021-07-09 17:09:23,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:23,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131633150] [2021-07-09 17:09:23,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:23,640 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:23,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:23,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131633150] [2021-07-09 17:09:23,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131633150] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:23,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345401152] [2021-07-09 17:09:23,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:23,677 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:09:23,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:23,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:23,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:23,725 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:23,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345401152] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:23,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:23,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:09:23,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928309540] [2021-07-09 17:09:23,726 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:23,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:23,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:23,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:23,726 INFO L87 Difference]: Start difference. First operand 4449 states and 12643 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) [2021-07-09 17:09:23,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:23,825 INFO L93 Difference]: Finished difference Result 5697 states and 15817 transitions. [2021-07-09 17:09:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:23,825 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 [2021-07-09 17:09:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:23,835 INFO L225 Difference]: With dead ends: 5697 [2021-07-09 17:09:23,835 INFO L226 Difference]: Without dead ends: 5697 [2021-07-09 17:09:23,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.9ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:23,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5697 states. [2021-07-09 17:09:23,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5697 to 5030. [2021-07-09 17:09:23,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5030 states, 5029 states have (on average 2.8657784847882284) internal successors, (14412), 5029 states have internal predecessors, (14412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:23,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5030 states to 5030 states and 14412 transitions. [2021-07-09 17:09:23,949 INFO L78 Accepts]: Start accepts. Automaton has 5030 states and 14412 transitions. Word has length 26 [2021-07-09 17:09:23,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:23,949 INFO L482 AbstractCegarLoop]: Abstraction has 5030 states and 14412 transitions. [2021-07-09 17:09:23,949 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) [2021-07-09 17:09:23,949 INFO L276 IsEmpty]: Start isEmpty. Operand 5030 states and 14412 transitions. [2021-07-09 17:09:23,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:23,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:23,953 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:24,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:24,169 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:24,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:24,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1680875446, now seen corresponding path program 31 times [2021-07-09 17:09:24,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:24,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713586734] [2021-07-09 17:09:24,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:24,195 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:24,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:24,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713586734] [2021-07-09 17:09:24,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713586734] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445655585] [2021-07-09 17:09:24,195 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:24,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:24,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:24,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:24,255 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:24,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [445655585] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:24,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-09 17:09:24,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571625183] [2021-07-09 17:09:24,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:24,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:24,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:24,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:24,256 INFO L87 Difference]: Start difference. First operand 5030 states and 14412 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:24,378 INFO L93 Difference]: Finished difference Result 6176 states and 17476 transitions. [2021-07-09 17:09:24,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:24,378 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:24,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:24,390 INFO L225 Difference]: With dead ends: 6176 [2021-07-09 17:09:24,390 INFO L226 Difference]: Without dead ends: 6160 [2021-07-09 17:09:24,391 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 40.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:24,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6160 states. [2021-07-09 17:09:24,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6160 to 5779. [2021-07-09 17:09:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5779 states, 5778 states have (on average 2.8816199376947043) internal successors, (16650), 5778 states have internal predecessors, (16650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5779 states to 5779 states and 16650 transitions. [2021-07-09 17:09:24,485 INFO L78 Accepts]: Start accepts. Automaton has 5779 states and 16650 transitions. Word has length 26 [2021-07-09 17:09:24,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:24,485 INFO L482 AbstractCegarLoop]: Abstraction has 5779 states and 16650 transitions. [2021-07-09 17:09:24,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,485 INFO L276 IsEmpty]: Start isEmpty. Operand 5779 states and 16650 transitions. [2021-07-09 17:09:24,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:24,489 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:24,489 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:24,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:24,705 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1058995036, now seen corresponding path program 32 times [2021-07-09 17:09:24,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:24,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611687501] [2021-07-09 17:09:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:24,737 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:24,737 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:24,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611687501] [2021-07-09 17:09:24,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611687501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973873518] [2021-07-09 17:09:24,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:24,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:24,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:24,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:24,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:24,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973873518] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:24,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:24,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-09 17:09:24,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705492553] [2021-07-09 17:09:24,820 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:24,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:24,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:24,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:24,820 INFO L87 Difference]: Start difference. First operand 5779 states and 16650 transitions. Second operand has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:24,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:24,941 INFO L93 Difference]: Finished difference Result 6311 states and 17791 transitions. [2021-07-09 17:09:24,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:24,941 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:24,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:24,954 INFO L225 Difference]: With dead ends: 6311 [2021-07-09 17:09:24,954 INFO L226 Difference]: Without dead ends: 6311 [2021-07-09 17:09:24,954 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 43.3ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:24,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6311 states. [2021-07-09 17:09:25,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6311 to 5796. [2021-07-09 17:09:25,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5796 states, 5795 states have (on average 2.8807592752372737) internal successors, (16694), 5795 states have internal predecessors, (16694), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5796 states to 5796 states and 16694 transitions. [2021-07-09 17:09:25,080 INFO L78 Accepts]: Start accepts. Automaton has 5796 states and 16694 transitions. Word has length 26 [2021-07-09 17:09:25,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:25,080 INFO L482 AbstractCegarLoop]: Abstraction has 5796 states and 16694 transitions. [2021-07-09 17:09:25,080 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.428571428571429) internal successors, (31), 6 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,081 INFO L276 IsEmpty]: Start isEmpty. Operand 5796 states and 16694 transitions. [2021-07-09 17:09:25,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:25,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:25,084 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:25,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-07-09 17:09:25,297 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash 127178589, now seen corresponding path program 33 times [2021-07-09 17:09:25,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:25,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918495101] [2021-07-09 17:09:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:25,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:25,323 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:25,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:25,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918495101] [2021-07-09 17:09:25,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918495101] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:25,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67214806] [2021-07-09 17:09:25,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:25,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:25,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:25,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:25,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:25,407 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:25,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67214806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:25,407 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:25,407 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:09:25,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336668776] [2021-07-09 17:09:25,407 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:25,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:25,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:25,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:25,407 INFO L87 Difference]: Start difference. First operand 5796 states and 16694 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) [2021-07-09 17:09:25,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:25,473 INFO L93 Difference]: Finished difference Result 6492 states and 18169 transitions. [2021-07-09 17:09:25,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:25,474 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 [2021-07-09 17:09:25,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:25,482 INFO L225 Difference]: With dead ends: 6492 [2021-07-09 17:09:25,482 INFO L226 Difference]: Without dead ends: 6489 [2021-07-09 17:09:25,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:25,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6489 states. [2021-07-09 17:09:25,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6489 to 5795. [2021-07-09 17:09:25,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5795 states, 5794 states have (on average 2.8795305488436314) internal successors, (16684), 5794 states have internal predecessors, (16684), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:25,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5795 states to 5795 states and 16684 transitions. [2021-07-09 17:09:25,615 INFO L78 Accepts]: Start accepts. Automaton has 5795 states and 16684 transitions. Word has length 26 [2021-07-09 17:09:25,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:25,615 INFO L482 AbstractCegarLoop]: Abstraction has 5795 states and 16684 transitions. [2021-07-09 17:09:25,615 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) [2021-07-09 17:09:25,615 INFO L276 IsEmpty]: Start isEmpty. Operand 5795 states and 16684 transitions. [2021-07-09 17:09:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:25,618 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:25,618 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:25,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:25,834 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:25,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:25,835 INFO L82 PathProgramCache]: Analyzing trace with hash -578577420, now seen corresponding path program 34 times [2021-07-09 17:09:25,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:25,835 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290352045] [2021-07-09 17:09:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:25,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:25,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:25,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290352045] [2021-07-09 17:09:25,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290352045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:25,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027623704] [2021-07-09 17:09:25,876 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:25,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:25,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:25,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:25,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:25,938 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 13 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:25,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2027623704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:25,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:25,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-09 17:09:25,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868576085] [2021-07-09 17:09:25,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:25,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:25,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:25,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:25,940 INFO L87 Difference]: Start difference. First operand 5795 states and 16684 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:26,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:26,098 INFO L93 Difference]: Finished difference Result 6497 states and 18243 transitions. [2021-07-09 17:09:26,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:26,099 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:26,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:26,108 INFO L225 Difference]: With dead ends: 6497 [2021-07-09 17:09:26,109 INFO L226 Difference]: Without dead ends: 6497 [2021-07-09 17:09:26,117 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 60.4ms TimeCoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:26,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6497 states. [2021-07-09 17:09:26,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6497 to 5692. [2021-07-09 17:09:26,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5692 states, 5691 states have (on average 2.870848708487085) internal successors, (16338), 5691 states have internal predecessors, (16338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:26,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5692 states to 5692 states and 16338 transitions. [2021-07-09 17:09:26,189 INFO L78 Accepts]: Start accepts. Automaton has 5692 states and 16338 transitions. Word has length 26 [2021-07-09 17:09:26,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:26,189 INFO L482 AbstractCegarLoop]: Abstraction has 5692 states and 16338 transitions. [2021-07-09 17:09:26,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:26,189 INFO L276 IsEmpty]: Start isEmpty. Operand 5692 states and 16338 transitions. [2021-07-09 17:09:26,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:26,192 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:26,193 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:26,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:26,406 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:26,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:26,407 INFO L82 PathProgramCache]: Analyzing trace with hash 334241155, now seen corresponding path program 35 times [2021-07-09 17:09:26,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:26,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190590359] [2021-07-09 17:09:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:26,443 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:26,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:26,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190590359] [2021-07-09 17:09:26,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190590359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:26,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045280827] [2021-07-09 17:09:26,444 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:26,511 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-09 17:09:26,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:26,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:26,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:26,556 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:26,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045280827] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:26,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:26,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-07-09 17:09:26,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21492569] [2021-07-09 17:09:26,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:26,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:26,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:26,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:26,557 INFO L87 Difference]: Start difference. First operand 5692 states and 16338 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:26,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:26,678 INFO L93 Difference]: Finished difference Result 8010 states and 22671 transitions. [2021-07-09 17:09:26,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:26,678 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:26,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:26,695 INFO L225 Difference]: With dead ends: 8010 [2021-07-09 17:09:26,695 INFO L226 Difference]: Without dead ends: 7995 [2021-07-09 17:09:26,695 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:26,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7995 states. [2021-07-09 17:09:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7995 to 7490. [2021-07-09 17:09:26,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7490 states, 7489 states have (on average 2.8919748965148884) internal successors, (21658), 7489 states have internal predecessors, (21658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7490 states to 7490 states and 21658 transitions. [2021-07-09 17:09:26,854 INFO L78 Accepts]: Start accepts. Automaton has 7490 states and 21658 transitions. Word has length 26 [2021-07-09 17:09:26,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:26,854 INFO L482 AbstractCegarLoop]: Abstraction has 7490 states and 21658 transitions. [2021-07-09 17:09:26,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:26,854 INFO L276 IsEmpty]: Start isEmpty. Operand 7490 states and 21658 transitions. [2021-07-09 17:09:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:26,858 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:26,858 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:27,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-07-09 17:09:27,073 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:27,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:27,073 INFO L82 PathProgramCache]: Analyzing trace with hash -232684456, now seen corresponding path program 36 times [2021-07-09 17:09:27,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:27,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210077645] [2021-07-09 17:09:27,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:27,159 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:27,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210077645] [2021-07-09 17:09:27,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1210077645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:27,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217673046] [2021-07-09 17:09:27,159 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:27,184 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:09:27,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:27,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:27,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:27,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217673046] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:27,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:27,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-09 17:09:27,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23381381] [2021-07-09 17:09:27,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:27,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:27,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:27,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:27,261 INFO L87 Difference]: Start difference. First operand 7490 states and 21658 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:27,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:27,555 INFO L93 Difference]: Finished difference Result 8305 states and 23489 transitions. [2021-07-09 17:09:27,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:09:27,556 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:27,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:27,574 INFO L225 Difference]: With dead ends: 8305 [2021-07-09 17:09:27,574 INFO L226 Difference]: Without dead ends: 8305 [2021-07-09 17:09:27,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 147.6ms TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:09:27,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8305 states. [2021-07-09 17:09:27,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8305 to 5349. [2021-07-09 17:09:27,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5349 states, 5348 states have (on average 2.863874345549738) internal successors, (15316), 5348 states have internal predecessors, (15316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:27,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5349 states to 5349 states and 15316 transitions. [2021-07-09 17:09:27,689 INFO L78 Accepts]: Start accepts. Automaton has 5349 states and 15316 transitions. Word has length 26 [2021-07-09 17:09:27,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:27,689 INFO L482 AbstractCegarLoop]: Abstraction has 5349 states and 15316 transitions. [2021-07-09 17:09:27,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:27,689 INFO L276 IsEmpty]: Start isEmpty. Operand 5349 states and 15316 transitions. [2021-07-09 17:09:27,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-07-09 17:09:27,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:27,694 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:27,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:27,908 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:27,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1947181405, now seen corresponding path program 37 times [2021-07-09 17:09:27,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:27,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771325300] [2021-07-09 17:09:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:27,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:27,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:27,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771325300] [2021-07-09 17:09:27,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771325300] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:27,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999205789] [2021-07-09 17:09:27,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:27,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:27,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-09 17:09:27,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:28,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999205789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:28,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:28,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:09:28,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421473380] [2021-07-09 17:09:28,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:28,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:28,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:28,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:28,041 INFO L87 Difference]: Start difference. First operand 5349 states and 15316 transitions. Second operand has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:28,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:28,149 INFO L93 Difference]: Finished difference Result 5938 states and 16533 transitions. [2021-07-09 17:09:28,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:28,149 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-07-09 17:09:28,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:28,160 INFO L225 Difference]: With dead ends: 5938 [2021-07-09 17:09:28,160 INFO L226 Difference]: Without dead ends: 5915 [2021-07-09 17:09:28,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:28,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5915 states. [2021-07-09 17:09:28,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5915 to 5382. [2021-07-09 17:09:28,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5382 states, 5381 states have (on average 2.858018955584464) internal successors, (15379), 5381 states have internal predecessors, (15379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:28,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5382 states to 5382 states and 15379 transitions. [2021-07-09 17:09:28,286 INFO L78 Accepts]: Start accepts. Automaton has 5382 states and 15379 transitions. Word has length 26 [2021-07-09 17:09:28,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:28,286 INFO L482 AbstractCegarLoop]: Abstraction has 5382 states and 15379 transitions. [2021-07-09 17:09:28,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.25) internal successors, (26), 7 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:28,286 INFO L276 IsEmpty]: Start isEmpty. Operand 5382 states and 15379 transitions. [2021-07-09 17:09:28,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:28,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:28,293 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:28,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-07-09 17:09:28,510 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:28,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:28,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1692037720, now seen corresponding path program 5 times [2021-07-09 17:09:28,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:28,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555058645] [2021-07-09 17:09:28,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:28,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:28,556 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:28,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555058645] [2021-07-09 17:09:28,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555058645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:28,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387840400] [2021-07-09 17:09:28,556 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:28,579 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:09:28,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:28,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:28,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:28,635 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:28,636 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387840400] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:28,636 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:28,636 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:09:28,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804086335] [2021-07-09 17:09:28,636 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:28,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:28,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:28,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:28,636 INFO L87 Difference]: Start difference. First operand 5382 states and 15379 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:28,838 INFO L93 Difference]: Finished difference Result 5894 states and 16303 transitions. [2021-07-09 17:09:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:28,839 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:28,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:28,849 INFO L225 Difference]: With dead ends: 5894 [2021-07-09 17:09:28,849 INFO L226 Difference]: Without dead ends: 5890 [2021-07-09 17:09:28,849 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 96.4ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:28,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5890 states. [2021-07-09 17:09:28,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5890 to 5478. [2021-07-09 17:09:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 2.823808654372832) internal successors, (15466), 5477 states have internal predecessors, (15466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:28,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 15466 transitions. [2021-07-09 17:09:28,940 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 15466 transitions. Word has length 29 [2021-07-09 17:09:28,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:28,940 INFO L482 AbstractCegarLoop]: Abstraction has 5478 states and 15466 transitions. [2021-07-09 17:09:28,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:28,940 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 15466 transitions. [2021-07-09 17:09:28,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:28,946 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:28,946 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:29,162 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:29,163 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:29,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:29,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2081641864, now seen corresponding path program 38 times [2021-07-09 17:09:29,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:29,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925723652] [2021-07-09 17:09:29,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:29,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:29,195 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:29,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:29,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925723652] [2021-07-09 17:09:29,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925723652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:29,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018486210] [2021-07-09 17:09:29,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:29,247 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:29,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:29,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:09:29,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:29,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018486210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:29,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:29,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:09:29,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291408539] [2021-07-09 17:09:29,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:29,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:29,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:29,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:29,287 INFO L87 Difference]: Start difference. First operand 5478 states and 15466 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:29,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:29,398 INFO L93 Difference]: Finished difference Result 6571 states and 18236 transitions. [2021-07-09 17:09:29,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:29,398 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:29,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:29,412 INFO L225 Difference]: With dead ends: 6571 [2021-07-09 17:09:29,412 INFO L226 Difference]: Without dead ends: 6564 [2021-07-09 17:09:29,412 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:29,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6564 states. [2021-07-09 17:09:29,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6564 to 6354. [2021-07-09 17:09:29,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6354 states, 6353 states have (on average 2.808279552967102) internal successors, (17841), 6353 states have internal predecessors, (17841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:29,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6354 states to 6354 states and 17841 transitions. [2021-07-09 17:09:29,557 INFO L78 Accepts]: Start accepts. Automaton has 6354 states and 17841 transitions. Word has length 29 [2021-07-09 17:09:29,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:29,557 INFO L482 AbstractCegarLoop]: Abstraction has 6354 states and 17841 transitions. [2021-07-09 17:09:29,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:29,557 INFO L276 IsEmpty]: Start isEmpty. Operand 6354 states and 17841 transitions. [2021-07-09 17:09:29,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:29,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:29,562 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:29,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:29,779 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:29,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:29,779 INFO L82 PathProgramCache]: Analyzing trace with hash -159779870, now seen corresponding path program 39 times [2021-07-09 17:09:29,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:29,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077136559] [2021-07-09 17:09:29,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:29,809 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:09:29,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:29,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077136559] [2021-07-09 17:09:29,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077136559] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:29,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428915710] [2021-07-09 17:09:29,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:29,846 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:09:29,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:29,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:29,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:29,985 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 16 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-07-09 17:09:29,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428915710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:29,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:29,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2021-07-09 17:09:29,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727590707] [2021-07-09 17:09:29,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:09:29,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:29,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:09:29,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:29,986 INFO L87 Difference]: Start difference. First operand 6354 states and 17841 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:30,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:30,822 INFO L93 Difference]: Finished difference Result 14438 states and 39075 transitions. [2021-07-09 17:09:30,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:09:30,823 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:30,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:30,856 INFO L225 Difference]: With dead ends: 14438 [2021-07-09 17:09:30,856 INFO L226 Difference]: Without dead ends: 14355 [2021-07-09 17:09:30,857 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 414.6ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:09:30,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14355 states. [2021-07-09 17:09:31,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14355 to 8796. [2021-07-09 17:09:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8796 states, 8795 states have (on average 2.8627629334849347) internal successors, (25178), 8795 states have internal predecessors, (25178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:31,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 25178 transitions. [2021-07-09 17:09:31,143 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 25178 transitions. Word has length 29 [2021-07-09 17:09:31,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:31,144 INFO L482 AbstractCegarLoop]: Abstraction has 8796 states and 25178 transitions. [2021-07-09 17:09:31,144 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:31,144 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 25178 transitions. [2021-07-09 17:09:31,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:31,151 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:31,151 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:31,367 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:31,368 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:31,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:31,368 INFO L82 PathProgramCache]: Analyzing trace with hash 328852904, now seen corresponding path program 6 times [2021-07-09 17:09:31,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:31,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202029680] [2021-07-09 17:09:31,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:31,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:31,423 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:31,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:31,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202029680] [2021-07-09 17:09:31,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202029680] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:31,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1774822154] [2021-07-09 17:09:31,423 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:31,447 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:09:31,447 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:31,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:09:31,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:31,555 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:09:31,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:09:31,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:31,562 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-07-09 17:09:31,562 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:09:31,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:31,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-07-09 17:09:31,568 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:31,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1774822154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:31,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:31,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-07-09 17:09:31,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875446388] [2021-07-09 17:09:31,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:09:31,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:31,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:09:31,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:31,569 INFO L87 Difference]: Start difference. First operand 8796 states and 25178 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:31,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:31,818 INFO L93 Difference]: Finished difference Result 6002 states and 16256 transitions. [2021-07-09 17:09:31,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:31,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:31,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:31,829 INFO L225 Difference]: With dead ends: 6002 [2021-07-09 17:09:31,829 INFO L226 Difference]: Without dead ends: 5857 [2021-07-09 17:09:31,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 70.6ms TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:31,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5857 states. [2021-07-09 17:09:31,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5857 to 3330. [2021-07-09 17:09:31,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3330 states, 3329 states have (on average 2.7981375788525082) internal successors, (9315), 3329 states have internal predecessors, (9315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:31,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3330 states to 3330 states and 9315 transitions. [2021-07-09 17:09:31,892 INFO L78 Accepts]: Start accepts. Automaton has 3330 states and 9315 transitions. Word has length 29 [2021-07-09 17:09:31,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:31,892 INFO L482 AbstractCegarLoop]: Abstraction has 3330 states and 9315 transitions. [2021-07-09 17:09:31,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:31,893 INFO L276 IsEmpty]: Start isEmpty. Operand 3330 states and 9315 transitions. [2021-07-09 17:09:31,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:31,896 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:31,896 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:32,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:32,113 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:32,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:32,113 INFO L82 PathProgramCache]: Analyzing trace with hash -114875864, now seen corresponding path program 7 times [2021-07-09 17:09:32,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:32,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241167773] [2021-07-09 17:09:32,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:32,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:32,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:32,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241167773] [2021-07-09 17:09:32,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241167773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:32,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676192802] [2021-07-09 17:09:32,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:09:32,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:32,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:32,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:32,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676192802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:32,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:32,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:09:32,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467450357] [2021-07-09 17:09:32,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:32,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:32,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:32,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:32,325 INFO L87 Difference]: Start difference. First operand 3330 states and 9315 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:32,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:32,415 INFO L93 Difference]: Finished difference Result 3434 states and 9538 transitions. [2021-07-09 17:09:32,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:32,416 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:32,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:32,423 INFO L225 Difference]: With dead ends: 3434 [2021-07-09 17:09:32,423 INFO L226 Difference]: Without dead ends: 3434 [2021-07-09 17:09:32,423 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 52.4ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3434 states. [2021-07-09 17:09:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3434 to 3356. [2021-07-09 17:09:32,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 2.794634873323398) internal successors, (9376), 3355 states have internal predecessors, (9376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:32,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 9376 transitions. [2021-07-09 17:09:32,480 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 9376 transitions. Word has length 29 [2021-07-09 17:09:32,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:32,480 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 9376 transitions. [2021-07-09 17:09:32,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:32,480 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 9376 transitions. [2021-07-09 17:09:32,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:32,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:32,484 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:32,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-07-09 17:09:32,689 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1336556998, now seen corresponding path program 6 times [2021-07-09 17:09:32,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:32,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929570360] [2021-07-09 17:09:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:32,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:32,744 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:32,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:32,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929570360] [2021-07-09 17:09:32,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929570360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:32,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288519380] [2021-07-09 17:09:32,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:32,769 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:09:32,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:32,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:32,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 16 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:32,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288519380] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:32,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:32,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:09:32,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506748704] [2021-07-09 17:09:32,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:32,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:32,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:32,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:32,839 INFO L87 Difference]: Start difference. First operand 3356 states and 9376 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:32,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:32,972 INFO L93 Difference]: Finished difference Result 3792 states and 10255 transitions. [2021-07-09 17:09:32,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:32,973 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:32,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:32,978 INFO L225 Difference]: With dead ends: 3792 [2021-07-09 17:09:32,979 INFO L226 Difference]: Without dead ends: 3777 [2021-07-09 17:09:32,979 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.2ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:32,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3777 states. [2021-07-09 17:09:33,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3777 to 3443. [2021-07-09 17:09:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.779779198140616) internal successors, (9568), 3442 states have internal predecessors, (9568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:33,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 9568 transitions. [2021-07-09 17:09:33,027 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 9568 transitions. Word has length 29 [2021-07-09 17:09:33,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:33,027 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 9568 transitions. [2021-07-09 17:09:33,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:33,027 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 9568 transitions. [2021-07-09 17:09:33,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:33,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:33,030 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:33,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-07-09 17:09:33,245 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:33,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:33,245 INFO L82 PathProgramCache]: Analyzing trace with hash -1458077306, now seen corresponding path program 8 times [2021-07-09 17:09:33,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:33,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452133900] [2021-07-09 17:09:33,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:33,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:33,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452133900] [2021-07-09 17:09:33,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452133900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:33,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395240785] [2021-07-09 17:09:33,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:33,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:33,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:33,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:33,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:33,372 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:33,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395240785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:33,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:33,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:09:33,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320596678] [2021-07-09 17:09:33,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:33,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:33,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:33,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:33,373 INFO L87 Difference]: Start difference. First operand 3443 states and 9568 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:33,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:33,537 INFO L93 Difference]: Finished difference Result 3707 states and 10003 transitions. [2021-07-09 17:09:33,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:33,538 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:33,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:33,544 INFO L225 Difference]: With dead ends: 3707 [2021-07-09 17:09:33,544 INFO L226 Difference]: Without dead ends: 3623 [2021-07-09 17:09:33,544 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 48.5ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:33,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3623 states. [2021-07-09 17:09:33,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3623 to 3361. [2021-07-09 17:09:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3361 states, 3360 states have (on average 2.7607142857142857) internal successors, (9276), 3360 states have internal predecessors, (9276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:33,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3361 states to 3361 states and 9276 transitions. [2021-07-09 17:09:33,595 INFO L78 Accepts]: Start accepts. Automaton has 3361 states and 9276 transitions. Word has length 29 [2021-07-09 17:09:33,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:33,595 INFO L482 AbstractCegarLoop]: Abstraction has 3361 states and 9276 transitions. [2021-07-09 17:09:33,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:33,595 INFO L276 IsEmpty]: Start isEmpty. Operand 3361 states and 9276 transitions. [2021-07-09 17:09:33,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:33,598 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:33,598 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:33,808 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-07-09 17:09:33,808 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:33,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2071613486, now seen corresponding path program 9 times [2021-07-09 17:09:33,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:33,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375884025] [2021-07-09 17:09:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:33,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:33,865 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:33,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:33,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375884025] [2021-07-09 17:09:33,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375884025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:33,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484912685] [2021-07-09 17:09:33,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:33,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:09:33,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:33,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:33,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:33,931 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:33,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484912685] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:33,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:33,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:09:33,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457257350] [2021-07-09 17:09:33,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:33,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:33,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:33,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:33,932 INFO L87 Difference]: Start difference. First operand 3361 states and 9276 transitions. Second operand has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:34,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:34,039 INFO L93 Difference]: Finished difference Result 3919 states and 10560 transitions. [2021-07-09 17:09:34,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:34,039 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:34,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:34,046 INFO L225 Difference]: With dead ends: 3919 [2021-07-09 17:09:34,046 INFO L226 Difference]: Without dead ends: 3907 [2021-07-09 17:09:34,047 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 48.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-07-09 17:09:34,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3641. [2021-07-09 17:09:34,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 2.745879120879121) internal successors, (9995), 3640 states have internal predecessors, (9995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:34,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 9995 transitions. [2021-07-09 17:09:34,119 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 9995 transitions. Word has length 29 [2021-07-09 17:09:34,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:34,119 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 9995 transitions. [2021-07-09 17:09:34,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.0) internal successors, (28), 6 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:34,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 9995 transitions. [2021-07-09 17:09:34,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:34,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:34,123 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:34,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-07-09 17:09:34,340 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:34,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:34,340 INFO L82 PathProgramCache]: Analyzing trace with hash 1048811592, now seen corresponding path program 40 times [2021-07-09 17:09:34,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:34,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605109460] [2021-07-09 17:09:34,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:34,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:09:34,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:34,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605109460] [2021-07-09 17:09:34,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605109460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:34,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29475726] [2021-07-09 17:09:34,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:34,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:34,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:34,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:09:34,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:09:34,453 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29475726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:34,453 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:34,453 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:09:34,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108699225] [2021-07-09 17:09:34,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:34,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:34,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:34,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:34,455 INFO L87 Difference]: Start difference. First operand 3641 states and 9995 transitions. Second operand has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:34,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:34,554 INFO L93 Difference]: Finished difference Result 4879 states and 13397 transitions. [2021-07-09 17:09:34,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:34,554 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:34,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:34,563 INFO L225 Difference]: With dead ends: 4879 [2021-07-09 17:09:34,563 INFO L226 Difference]: Without dead ends: 4866 [2021-07-09 17:09:34,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:34,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4866 states. [2021-07-09 17:09:34,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4866 to 4554. [2021-07-09 17:09:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4554 states, 4553 states have (on average 2.7981550625960905) internal successors, (12740), 4553 states have internal predecessors, (12740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4554 states to 4554 states and 12740 transitions. [2021-07-09 17:09:34,639 INFO L78 Accepts]: Start accepts. Automaton has 4554 states and 12740 transitions. Word has length 29 [2021-07-09 17:09:34,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:34,639 INFO L482 AbstractCegarLoop]: Abstraction has 4554 states and 12740 transitions. [2021-07-09 17:09:34,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.666666666666667) internal successors, (28), 5 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 4554 states and 12740 transitions. [2021-07-09 17:09:34,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:34,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:34,643 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:34,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-07-09 17:09:34,859 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:34,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:34,860 INFO L82 PathProgramCache]: Analyzing trace with hash 70303848, now seen corresponding path program 10 times [2021-07-09 17:09:34,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:34,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32235681] [2021-07-09 17:09:34,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:34,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:34,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32235681] [2021-07-09 17:09:34,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32235681] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:34,905 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531830218] [2021-07-09 17:09:34,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:34,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:34,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:34,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:09:34,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:34,975 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:09:34,976 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:09:34,977 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:34,978 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:09:34,979 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:09:34,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:34,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:09:34,985 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:34,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531830218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:34,986 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:34,986 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:09:34,986 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362072639] [2021-07-09 17:09:34,986 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:34,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:34,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:34,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:34,986 INFO L87 Difference]: Start difference. First operand 4554 states and 12740 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:35,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:35,193 INFO L93 Difference]: Finished difference Result 7716 states and 21017 transitions. [2021-07-09 17:09:35,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:09:35,193 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:35,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:35,207 INFO L225 Difference]: With dead ends: 7716 [2021-07-09 17:09:35,207 INFO L226 Difference]: Without dead ends: 7689 [2021-07-09 17:09:35,208 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:35,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7689 states. [2021-07-09 17:09:35,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7689 to 6612. [2021-07-09 17:09:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6612 states, 6611 states have (on average 2.8100136136741796) internal successors, (18577), 6611 states have internal predecessors, (18577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:35,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6612 states to 6612 states and 18577 transitions. [2021-07-09 17:09:35,339 INFO L78 Accepts]: Start accepts. Automaton has 6612 states and 18577 transitions. Word has length 29 [2021-07-09 17:09:35,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:35,339 INFO L482 AbstractCegarLoop]: Abstraction has 6612 states and 18577 transitions. [2021-07-09 17:09:35,339 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:35,340 INFO L276 IsEmpty]: Start isEmpty. Operand 6612 states and 18577 transitions. [2021-07-09 17:09:35,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:35,344 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:35,344 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:35,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-07-09 17:09:35,561 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:35,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:35,561 INFO L82 PathProgramCache]: Analyzing trace with hash -1154021054, now seen corresponding path program 7 times [2021-07-09 17:09:35,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:35,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363999693] [2021-07-09 17:09:35,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:35,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:35,603 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:35,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363999693] [2021-07-09 17:09:35,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363999693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:35,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409179637] [2021-07-09 17:09:35,603 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:35,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:35,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:09:35,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:35,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:09:35,688 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:09:35,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:35,690 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:09:35,690 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:09:35,691 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:35,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:09:35,696 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:35,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409179637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:35,696 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:35,696 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:09:35,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179092226] [2021-07-09 17:09:35,696 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:35,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:35,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:35,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:35,697 INFO L87 Difference]: Start difference. First operand 6612 states and 18577 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:35,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:35,971 INFO L93 Difference]: Finished difference Result 7693 states and 20980 transitions. [2021-07-09 17:09:35,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:09:35,972 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:35,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:35,988 INFO L225 Difference]: With dead ends: 7693 [2021-07-09 17:09:35,988 INFO L226 Difference]: Without dead ends: 7662 [2021-07-09 17:09:35,988 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:35,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7662 states. [2021-07-09 17:09:36,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7662 to 6972. [2021-07-09 17:09:36,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6972 states, 6971 states have (on average 2.7987376273131543) internal successors, (19510), 6971 states have internal predecessors, (19510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:36,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6972 states to 6972 states and 19510 transitions. [2021-07-09 17:09:36,122 INFO L78 Accepts]: Start accepts. Automaton has 6972 states and 19510 transitions. Word has length 29 [2021-07-09 17:09:36,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:36,122 INFO L482 AbstractCegarLoop]: Abstraction has 6972 states and 19510 transitions. [2021-07-09 17:09:36,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:36,122 INFO L276 IsEmpty]: Start isEmpty. Operand 6972 states and 19510 transitions. [2021-07-09 17:09:36,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:36,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:36,127 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:36,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:36,345 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:36,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:36,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1507649858, now seen corresponding path program 11 times [2021-07-09 17:09:36,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:36,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628564343] [2021-07-09 17:09:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:36,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:36,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:36,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628564343] [2021-07-09 17:09:36,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628564343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:36,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506342547] [2021-07-09 17:09:36,391 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 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 [2021-07-09 17:09:36,420 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:09:36,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:36,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:36,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:36,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:36,497 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [506342547] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:36,497 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:36,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-07-09 17:09:36,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511958626] [2021-07-09 17:09:36,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:36,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:36,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:36,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:36,498 INFO L87 Difference]: Start difference. First operand 6972 states and 19510 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:36,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:36,646 INFO L93 Difference]: Finished difference Result 6857 states and 19119 transitions. [2021-07-09 17:09:36,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:09:36,646 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:36,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:36,660 INFO L225 Difference]: With dead ends: 6857 [2021-07-09 17:09:36,660 INFO L226 Difference]: Without dead ends: 6823 [2021-07-09 17:09:36,660 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.9ms TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:36,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6823 states. [2021-07-09 17:09:36,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6823 to 6569. [2021-07-09 17:09:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6569 states, 6568 states have (on average 2.82673568818514) internal successors, (18566), 6568 states have internal predecessors, (18566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:36,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6569 states to 6569 states and 18566 transitions. [2021-07-09 17:09:36,778 INFO L78 Accepts]: Start accepts. Automaton has 6569 states and 18566 transitions. Word has length 29 [2021-07-09 17:09:36,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:36,778 INFO L482 AbstractCegarLoop]: Abstraction has 6569 states and 18566 transitions. [2021-07-09 17:09:36,778 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:36,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6569 states and 18566 transitions. [2021-07-09 17:09:36,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:36,782 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:36,783 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:37,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-07-09 17:09:37,004 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:37,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:37,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1002279274, now seen corresponding path program 8 times [2021-07-09 17:09:37,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:37,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852112413] [2021-07-09 17:09:37,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:37,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:37,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:37,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852112413] [2021-07-09 17:09:37,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852112413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:37,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083188248] [2021-07-09 17:09:37,054 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:37,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:37,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:37,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:37,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 3 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:37,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083188248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:37,128 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:37,128 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-07-09 17:09:37,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952771205] [2021-07-09 17:09:37,128 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:37,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:37,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:37,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:37,129 INFO L87 Difference]: Start difference. First operand 6569 states and 18566 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:37,258 INFO L93 Difference]: Finished difference Result 6936 states and 19307 transitions. [2021-07-09 17:09:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:37,259 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:37,272 INFO L225 Difference]: With dead ends: 6936 [2021-07-09 17:09:37,273 INFO L226 Difference]: Without dead ends: 6928 [2021-07-09 17:09:37,273 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 53.8ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6928 states. [2021-07-09 17:09:37,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6928 to 6620. [2021-07-09 17:09:37,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6620 states, 6619 states have (on average 2.8214231757063) internal successors, (18675), 6619 states have internal predecessors, (18675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:37,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6620 states to 6620 states and 18675 transitions. [2021-07-09 17:09:37,405 INFO L78 Accepts]: Start accepts. Automaton has 6620 states and 18675 transitions. Word has length 29 [2021-07-09 17:09:37,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:37,405 INFO L482 AbstractCegarLoop]: Abstraction has 6620 states and 18675 transitions. [2021-07-09 17:09:37,405 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) internal successors, (30), 6 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:37,405 INFO L276 IsEmpty]: Start isEmpty. Operand 6620 states and 18675 transitions. [2021-07-09 17:09:37,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:37,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:37,409 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:37,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:37,626 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:37,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:37,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1792355030, now seen corresponding path program 12 times [2021-07-09 17:09:37,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:37,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469928555] [2021-07-09 17:09:37,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:37,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:37,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:37,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469928555] [2021-07-09 17:09:37,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469928555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:37,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759766722] [2021-07-09 17:09:37,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:37,692 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-09 17:09:37,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:37,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:09:37,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:37,748 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:09:37,749 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:09:37,750 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:09:37,752 INFO L628 ElimStorePlain]: treesize reduction 14, result has 6.7 percent of original size [2021-07-09 17:09:37,752 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:09:37,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:09:37,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:22, output treesize:1 [2021-07-09 17:09:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 5 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:37,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1759766722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:37,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:37,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-07-09 17:09:37,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072316231] [2021-07-09 17:09:37,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:09:37,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:37,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:09:37,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:09:37,762 INFO L87 Difference]: Start difference. First operand 6620 states and 18675 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) [2021-07-09 17:09:37,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:37,934 INFO L93 Difference]: Finished difference Result 6433 states and 17744 transitions. [2021-07-09 17:09:37,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:37,935 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 29 [2021-07-09 17:09:37,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:37,946 INFO L225 Difference]: With dead ends: 6433 [2021-07-09 17:09:37,946 INFO L226 Difference]: Without dead ends: 6334 [2021-07-09 17:09:37,947 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 47.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:37,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6334 states. [2021-07-09 17:09:38,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6334 to 5949. [2021-07-09 17:09:38,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5949 states, 5948 states have (on average 2.8169132481506387) internal successors, (16755), 5948 states have internal predecessors, (16755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5949 states to 5949 states and 16755 transitions. [2021-07-09 17:09:38,050 INFO L78 Accepts]: Start accepts. Automaton has 5949 states and 16755 transitions. Word has length 29 [2021-07-09 17:09:38,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:38,050 INFO L482 AbstractCegarLoop]: Abstraction has 5949 states and 16755 transitions. [2021-07-09 17:09:38,050 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) [2021-07-09 17:09:38,050 INFO L276 IsEmpty]: Start isEmpty. Operand 5949 states and 16755 transitions. [2021-07-09 17:09:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:38,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:38,054 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:38,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-07-09 17:09:38,269 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:38,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:38,269 INFO L82 PathProgramCache]: Analyzing trace with hash 869370402, now seen corresponding path program 41 times [2021-07-09 17:09:38,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:38,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705933500] [2021-07-09 17:09:38,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:38,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:38,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705933500] [2021-07-09 17:09:38,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705933500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:38,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927227008] [2021-07-09 17:09:38,301 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:38,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:09:38,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:38,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:09:38,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:38,361 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:38,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927227008] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:38,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:38,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-07-09 17:09:38,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343639190] [2021-07-09 17:09:38,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-09 17:09:38,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:38,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-09 17:09:38,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:38,362 INFO L87 Difference]: Start difference. First operand 5949 states and 16755 transitions. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:38,462 INFO L93 Difference]: Finished difference Result 6991 states and 19595 transitions. [2021-07-09 17:09:38,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-09 17:09:38,463 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:38,473 INFO L225 Difference]: With dead ends: 6991 [2021-07-09 17:09:38,473 INFO L226 Difference]: Without dead ends: 6978 [2021-07-09 17:09:38,473 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 20.3ms TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-07-09 17:09:38,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6978 states. [2021-07-09 17:09:38,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6978 to 6732. [2021-07-09 17:09:38,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6732 states, 6731 states have (on average 2.834794235626207) internal successors, (19081), 6731 states have internal predecessors, (19081), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6732 states to 6732 states and 19081 transitions. [2021-07-09 17:09:38,561 INFO L78 Accepts]: Start accepts. Automaton has 6732 states and 19081 transitions. Word has length 29 [2021-07-09 17:09:38,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:38,561 INFO L482 AbstractCegarLoop]: Abstraction has 6732 states and 19081 transitions. [2021-07-09 17:09:38,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 5 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 6732 states and 19081 transitions. [2021-07-09 17:09:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-07-09 17:09:38,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:38,564 INFO L508 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:38,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:38,780 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:38,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:38,780 INFO L82 PathProgramCache]: Analyzing trace with hash -109137342, now seen corresponding path program 13 times [2021-07-09 17:09:38,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:38,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400037645] [2021-07-09 17:09:38,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:38,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:38,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:38,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400037645] [2021-07-09 17:09:38,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400037645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:38,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81329653] [2021-07-09 17:09:38,834 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 [2021-07-09 17:09:38,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:09:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 6 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:38,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81329653] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:38,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:38,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:09:38,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837686876] [2021-07-09 17:09:38,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:38,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:38,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:38,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:38,906 INFO L87 Difference]: Start difference. First operand 6732 states and 19081 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:39,098 INFO L93 Difference]: Finished difference Result 6655 states and 18587 transitions. [2021-07-09 17:09:39,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:39,099 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-07-09 17:09:39,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:39,108 INFO L225 Difference]: With dead ends: 6655 [2021-07-09 17:09:39,108 INFO L226 Difference]: Without dead ends: 6601 [2021-07-09 17:09:39,108 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 95.8ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:39,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6601 states. [2021-07-09 17:09:39,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6601 to 6248. [2021-07-09 17:09:39,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6248 states, 6247 states have (on average 2.8304786297422764) internal successors, (17682), 6247 states have internal predecessors, (17682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6248 states to 6248 states and 17682 transitions. [2021-07-09 17:09:39,192 INFO L78 Accepts]: Start accepts. Automaton has 6248 states and 17682 transitions. Word has length 29 [2021-07-09 17:09:39,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:39,192 INFO L482 AbstractCegarLoop]: Abstraction has 6248 states and 17682 transitions. [2021-07-09 17:09:39,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6248 states and 17682 transitions. [2021-07-09 17:09:39,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:39,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:39,196 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:39,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:39,412 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:39,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:39,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1428842088, now seen corresponding path program 42 times [2021-07-09 17:09:39,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:39,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949920587] [2021-07-09 17:09:39,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:39,469 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:39,469 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:39,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949920587] [2021-07-09 17:09:39,469 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1949920587] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,469 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316018015] [2021-07-09 17:09:39,469 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 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 [2021-07-09 17:09:39,495 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:09:39,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:39,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:39,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:39,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:39,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1316018015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:39,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:39,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:09:39,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286468770] [2021-07-09 17:09:39,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:39,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:39,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:39,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:39,543 INFO L87 Difference]: Start difference. First operand 6248 states and 17682 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:39,745 INFO L93 Difference]: Finished difference Result 6779 states and 18724 transitions. [2021-07-09 17:09:39,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:09:39,746 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:39,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:39,756 INFO L225 Difference]: With dead ends: 6779 [2021-07-09 17:09:39,756 INFO L226 Difference]: Without dead ends: 6779 [2021-07-09 17:09:39,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=99, Invalid=173, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:39,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6779 states. [2021-07-09 17:09:39,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6779 to 6214. [2021-07-09 17:09:39,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6214 states, 6213 states have (on average 2.829550941574119) internal successors, (17580), 6213 states have internal predecessors, (17580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6214 states to 6214 states and 17580 transitions. [2021-07-09 17:09:39,847 INFO L78 Accepts]: Start accepts. Automaton has 6214 states and 17580 transitions. Word has length 32 [2021-07-09 17:09:39,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:39,847 INFO L482 AbstractCegarLoop]: Abstraction has 6214 states and 17580 transitions. [2021-07-09 17:09:39,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:39,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6214 states and 17580 transitions. [2021-07-09 17:09:39,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:39,851 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:39,851 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:40,067 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:40,067 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:40,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:40,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1675261659, now seen corresponding path program 43 times [2021-07-09 17:09:40,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:40,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704883388] [2021-07-09 17:09:40,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:40,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:40,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:40,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704883388] [2021-07-09 17:09:40,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704883388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1763339314] [2021-07-09 17:09:40,112 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:09:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:40,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:40,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:40,241 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:40,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1763339314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:40,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-09 17:09:40,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135511799] [2021-07-09 17:09:40,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:09:40,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:40,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:09:40,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:09:40,243 INFO L87 Difference]: Start difference. First operand 6214 states and 17580 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:40,391 INFO L93 Difference]: Finished difference Result 9059 states and 24818 transitions. [2021-07-09 17:09:40,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:40,391 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:40,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:40,405 INFO L225 Difference]: With dead ends: 9059 [2021-07-09 17:09:40,405 INFO L226 Difference]: Without dead ends: 9035 [2021-07-09 17:09:40,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:40,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9035 states. [2021-07-09 17:09:40,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9035 to 7541. [2021-07-09 17:09:40,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7541 states, 7540 states have (on average 2.8545092838196284) internal successors, (21523), 7540 states have internal predecessors, (21523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7541 states to 7541 states and 21523 transitions. [2021-07-09 17:09:40,537 INFO L78 Accepts]: Start accepts. Automaton has 7541 states and 21523 transitions. Word has length 32 [2021-07-09 17:09:40,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:40,538 INFO L482 AbstractCegarLoop]: Abstraction has 7541 states and 21523 transitions. [2021-07-09 17:09:40,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:40,538 INFO L276 IsEmpty]: Start isEmpty. Operand 7541 states and 21523 transitions. [2021-07-09 17:09:40,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:40,542 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:40,543 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:40,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-07-09 17:09:40,759 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:40,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:40,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1825167733, now seen corresponding path program 44 times [2021-07-09 17:09:40,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:40,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624103145] [2021-07-09 17:09:40,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:40,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:40,791 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:40,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:40,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624103145] [2021-07-09 17:09:40,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624103145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902673714] [2021-07-09 17:09:40,792 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 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 [2021-07-09 17:09:40,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:40,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:40,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:40,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:40,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902673714] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:40,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:40,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-09 17:09:40,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258262250] [2021-07-09 17:09:40,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:40,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:40,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:40,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:40,864 INFO L87 Difference]: Start difference. First operand 7541 states and 21523 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:41,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:41,015 INFO L93 Difference]: Finished difference Result 9025 states and 24686 transitions. [2021-07-09 17:09:41,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:09:41,015 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:41,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:41,029 INFO L225 Difference]: With dead ends: 9025 [2021-07-09 17:09:41,029 INFO L226 Difference]: Without dead ends: 9025 [2021-07-09 17:09:41,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.5ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:41,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9025 states. [2021-07-09 17:09:41,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9025 to 7365. [2021-07-09 17:09:41,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7365 states, 7364 states have (on average 2.8473655621944594) internal successors, (20968), 7364 states have internal predecessors, (20968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:41,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7365 states to 7365 states and 20968 transitions. [2021-07-09 17:09:41,145 INFO L78 Accepts]: Start accepts. Automaton has 7365 states and 20968 transitions. Word has length 32 [2021-07-09 17:09:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:41,145 INFO L482 AbstractCegarLoop]: Abstraction has 7365 states and 20968 transitions. [2021-07-09 17:09:41,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 7365 states and 20968 transitions. [2021-07-09 17:09:41,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:41,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:41,150 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:41,366 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-07-09 17:09:41,366 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:41,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1537983116, now seen corresponding path program 45 times [2021-07-09 17:09:41,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:41,367 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999727135] [2021-07-09 17:09:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:41,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:41,400 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 21 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:41,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:41,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999727135] [2021-07-09 17:09:41,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999727135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:41,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880989914] [2021-07-09 17:09:41,401 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 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 [2021-07-09 17:09:41,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-09 17:09:41,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:41,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:41,542 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2021-07-09 17:09:41,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880989914] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:41,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:41,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-07-09 17:09:41,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181570465] [2021-07-09 17:09:41,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:41,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:41,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:41,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:41,543 INFO L87 Difference]: Start difference. First operand 7365 states and 20968 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:42,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:42,006 INFO L93 Difference]: Finished difference Result 8303 states and 22757 transitions. [2021-07-09 17:09:42,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:09:42,006 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:42,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:42,017 INFO L225 Difference]: With dead ends: 8303 [2021-07-09 17:09:42,017 INFO L226 Difference]: Without dead ends: 8260 [2021-07-09 17:09:42,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 303.5ms TimeCoverageRelationStatistics Valid=190, Invalid=680, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:09:42,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8260 states. [2021-07-09 17:09:42,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8260 to 7571. [2021-07-09 17:09:42,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7571 states, 7570 states have (on average 2.81664464993395) internal successors, (21322), 7570 states have internal predecessors, (21322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:42,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7571 states to 7571 states and 21322 transitions. [2021-07-09 17:09:42,122 INFO L78 Accepts]: Start accepts. Automaton has 7571 states and 21322 transitions. Word has length 32 [2021-07-09 17:09:42,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:42,122 INFO L482 AbstractCegarLoop]: Abstraction has 7571 states and 21322 transitions. [2021-07-09 17:09:42,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:42,122 INFO L276 IsEmpty]: Start isEmpty. Operand 7571 states and 21322 transitions. [2021-07-09 17:09:42,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:42,127 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:42,127 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:42,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-07-09 17:09:42,343 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:42,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:42,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1465178531, now seen corresponding path program 46 times [2021-07-09 17:09:42,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:42,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119870464] [2021-07-09 17:09:42,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:42,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:42,386 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 10 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:42,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:42,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119870464] [2021-07-09 17:09:42,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119870464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:42,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28596959] [2021-07-09 17:09:42,386 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 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 [2021-07-09 17:09:42,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:42,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:42,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:42,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 11 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:42,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28596959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:42,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:42,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-07-09 17:09:42,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57250934] [2021-07-09 17:09:42,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:42,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:42,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:42,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:42,490 INFO L87 Difference]: Start difference. First operand 7571 states and 21322 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:42,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:42,756 INFO L93 Difference]: Finished difference Result 13088 states and 35868 transitions. [2021-07-09 17:09:42,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:09:42,757 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:42,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:42,778 INFO L225 Difference]: With dead ends: 13088 [2021-07-09 17:09:42,778 INFO L226 Difference]: Without dead ends: 13088 [2021-07-09 17:09:42,778 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:42,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13088 states. [2021-07-09 17:09:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13088 to 10587. [2021-07-09 17:09:42,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.8707727186850556) internal successors, (30390), 10586 states have internal predecessors, (30390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:42,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 30390 transitions. [2021-07-09 17:09:42,955 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 30390 transitions. Word has length 32 [2021-07-09 17:09:42,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:42,956 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 30390 transitions. [2021-07-09 17:09:42,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:42,956 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 30390 transitions. [2021-07-09 17:09:42,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:42,961 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:42,961 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:43,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:43,174 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:43,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:43,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1653853746, now seen corresponding path program 47 times [2021-07-09 17:09:43,175 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:43,175 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931821859] [2021-07-09 17:09:43,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:43,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:43,207 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 8 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:43,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:43,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931821859] [2021-07-09 17:09:43,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931821859] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:43,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431134501] [2021-07-09 17:09:43,208 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 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 [2021-07-09 17:09:43,233 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:09:43,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:43,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:43,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:43,285 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:43,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431134501] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:43,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:43,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 8 [2021-07-09 17:09:43,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709760908] [2021-07-09 17:09:43,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:43,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:43,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:43,286 INFO L87 Difference]: Start difference. First operand 10587 states and 30390 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:43,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:43,536 INFO L93 Difference]: Finished difference Result 11705 states and 32668 transitions. [2021-07-09 17:09:43,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:09:43,536 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:43,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:43,557 INFO L225 Difference]: With dead ends: 11705 [2021-07-09 17:09:43,557 INFO L226 Difference]: Without dead ends: 11705 [2021-07-09 17:09:43,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 118.1ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:09:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11705 states. [2021-07-09 17:09:43,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11705 to 10573. [2021-07-09 17:09:43,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10573 states, 10572 states have (on average 2.8569807037457435) internal successors, (30204), 10572 states have internal predecessors, (30204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:43,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10573 states to 10573 states and 30204 transitions. [2021-07-09 17:09:43,755 INFO L78 Accepts]: Start accepts. Automaton has 10573 states and 30204 transitions. Word has length 32 [2021-07-09 17:09:43,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:43,755 INFO L482 AbstractCegarLoop]: Abstraction has 10573 states and 30204 transitions. [2021-07-09 17:09:43,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:43,755 INFO L276 IsEmpty]: Start isEmpty. Operand 10573 states and 30204 transitions. [2021-07-09 17:09:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:43,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:43,760 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:43,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-07-09 17:09:43,974 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:43,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:43,974 INFO L82 PathProgramCache]: Analyzing trace with hash 2101937765, now seen corresponding path program 48 times [2021-07-09 17:09:43,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:43,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468987857] [2021-07-09 17:09:43,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:43,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:44,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:44,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468987857] [2021-07-09 17:09:44,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468987857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:44,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011194561] [2021-07-09 17:09:44,005 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 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 [2021-07-09 17:09:44,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:09:44,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:44,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 27 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:44,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011194561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:44,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:44,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-09 17:09:44,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798065302] [2021-07-09 17:09:44,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:44,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:44,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:44,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:44,077 INFO L87 Difference]: Start difference. First operand 10573 states and 30204 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) [2021-07-09 17:09:44,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:44,253 INFO L93 Difference]: Finished difference Result 17407 states and 48712 transitions. [2021-07-09 17:09:44,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:09:44,253 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 32 [2021-07-09 17:09:44,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:44,284 INFO L225 Difference]: With dead ends: 17407 [2021-07-09 17:09:44,285 INFO L226 Difference]: Without dead ends: 17375 [2021-07-09 17:09:44,285 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 46.0ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:44,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17375 states. [2021-07-09 17:09:44,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17375 to 13902. [2021-07-09 17:09:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13902 states, 13901 states have (on average 2.8969138910869723) internal successors, (40270), 13901 states have internal predecessors, (40270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:44,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13902 states to 13902 states and 40270 transitions. [2021-07-09 17:09:44,699 INFO L78 Accepts]: Start accepts. Automaton has 13902 states and 40270 transitions. Word has length 32 [2021-07-09 17:09:44,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:44,699 INFO L482 AbstractCegarLoop]: Abstraction has 13902 states and 40270 transitions. [2021-07-09 17:09:44,700 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) [2021-07-09 17:09:44,700 INFO L276 IsEmpty]: Start isEmpty. Operand 13902 states and 40270 transitions. [2021-07-09 17:09:44,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:44,705 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:44,705 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:44,917 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-07-09 17:09:44,917 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:44,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:44,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1480057355, now seen corresponding path program 49 times [2021-07-09 17:09:44,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:44,917 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547943083] [2021-07-09 17:09:44,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:45,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:45,036 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 24 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:45,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:45,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547943083] [2021-07-09 17:09:45,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547943083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:45,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306185225] [2021-07-09 17:09:45,036 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 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 [2021-07-09 17:09:45,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:45,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:45,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:45,109 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:45,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306185225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:45,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:45,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 7 [2021-07-09 17:09:45,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196300340] [2021-07-09 17:09:45,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:45,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:45,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:45,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:45,110 INFO L87 Difference]: Start difference. First operand 13902 states and 40270 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) [2021-07-09 17:09:45,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:45,289 INFO L93 Difference]: Finished difference Result 17229 states and 47592 transitions. [2021-07-09 17:09:45,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:09:45,290 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 32 [2021-07-09 17:09:45,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:45,320 INFO L225 Difference]: With dead ends: 17229 [2021-07-09 17:09:45,320 INFO L226 Difference]: Without dead ends: 17226 [2021-07-09 17:09:45,321 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:45,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17226 states. [2021-07-09 17:09:45,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17226 to 13921. [2021-07-09 17:09:45,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13921 states, 13920 states have (on average 2.8902298850574715) internal successors, (40232), 13920 states have internal predecessors, (40232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 40232 transitions. [2021-07-09 17:09:45,582 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 40232 transitions. Word has length 32 [2021-07-09 17:09:45,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:45,582 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 40232 transitions. [2021-07-09 17:09:45,582 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) [2021-07-09 17:09:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 40232 transitions. [2021-07-09 17:09:45,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:45,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:45,587 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:45,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-07-09 17:09:45,804 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:45,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:45,804 INFO L82 PathProgramCache]: Analyzing trace with hash -157515101, now seen corresponding path program 50 times [2021-07-09 17:09:45,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:45,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509519733] [2021-07-09 17:09:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:45,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:45,843 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 25 proven. 7 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:09:45,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:45,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509519733] [2021-07-09 17:09:45,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509519733] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:45,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946665760] [2021-07-09 17:09:45,843 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 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 [2021-07-09 17:09:45,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:45,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:45,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:45,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:45,916 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 26 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:45,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946665760] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:45,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:45,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-07-09 17:09:45,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62994979] [2021-07-09 17:09:45,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:45,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:45,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:45,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:45,917 INFO L87 Difference]: Start difference. First operand 13921 states and 40232 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:46,236 INFO L93 Difference]: Finished difference Result 17332 states and 47741 transitions. [2021-07-09 17:09:46,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:09:46,236 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-07-09 17:09:46,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:46,269 INFO L225 Difference]: With dead ends: 17332 [2021-07-09 17:09:46,269 INFO L226 Difference]: Without dead ends: 17329 [2021-07-09 17:09:46,270 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=81, Invalid=129, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:46,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17329 states. [2021-07-09 17:09:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17329 to 13802. [2021-07-09 17:09:46,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13802 states, 13801 states have (on average 2.883124411274545) internal successors, (39790), 13801 states have internal predecessors, (39790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13802 states to 13802 states and 39790 transitions. [2021-07-09 17:09:46,599 INFO L78 Accepts]: Start accepts. Automaton has 13802 states and 39790 transitions. Word has length 32 [2021-07-09 17:09:46,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:46,599 INFO L482 AbstractCegarLoop]: Abstraction has 13802 states and 39790 transitions. [2021-07-09 17:09:46,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:46,599 INFO L276 IsEmpty]: Start isEmpty. Operand 13802 states and 39790 transitions. [2021-07-09 17:09:46,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-07-09 17:09:46,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:46,604 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:46,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-07-09 17:09:46,825 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:46,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:46,825 INFO L82 PathProgramCache]: Analyzing trace with hash 188377863, now seen corresponding path program 51 times [2021-07-09 17:09:46,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:46,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411092069] [2021-07-09 17:09:46,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:46,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 15 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:46,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:46,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411092069] [2021-07-09 17:09:46,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411092069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:46,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297717900] [2021-07-09 17:09:46,873 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 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 [2021-07-09 17:09:46,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:09:46,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:46,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-09 17:09:46,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 20 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2021-07-09 17:09:47,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297717900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:47,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:47,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 16 [2021-07-09 17:09:47,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169331993] [2021-07-09 17:09:47,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:09:47,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:47,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:09:47,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:09:47,052 INFO L87 Difference]: Start difference. First operand 13802 states and 39790 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-07-09 17:09:48,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:48,195 INFO L93 Difference]: Finished difference Result 22708 states and 63895 transitions. [2021-07-09 17:09:48,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-07-09 17:09:48,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 32 [2021-07-09 17:09:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:48,234 INFO L225 Difference]: With dead ends: 22708 [2021-07-09 17:09:48,235 INFO L226 Difference]: Without dead ends: 22654 [2021-07-09 17:09:48,235 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 806.4ms TimeCoverageRelationStatistics Valid=535, Invalid=1817, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:09:48,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22654 states. [2021-07-09 17:09:48,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22654 to 15246. [2021-07-09 17:09:48,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15246 states, 15245 states have (on average 2.8751065923253525) internal successors, (43831), 15245 states have internal predecessors, (43831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:48,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15246 states to 15246 states and 43831 transitions. [2021-07-09 17:09:48,527 INFO L78 Accepts]: Start accepts. Automaton has 15246 states and 43831 transitions. Word has length 32 [2021-07-09 17:09:48,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:48,527 INFO L482 AbstractCegarLoop]: Abstraction has 15246 states and 43831 transitions. [2021-07-09 17:09:48,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-07-09 17:09:48,527 INFO L276 IsEmpty]: Start isEmpty. Operand 15246 states and 43831 transitions. [2021-07-09 17:09:48,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:48,534 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:48,535 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:48,750 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-07-09 17:09:48,751 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:48,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:48,751 INFO L82 PathProgramCache]: Analyzing trace with hash -639720651, now seen corresponding path program 9 times [2021-07-09 17:09:48,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:48,751 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493482934] [2021-07-09 17:09:48,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:48,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:48,817 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:48,817 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:48,817 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493482934] [2021-07-09 17:09:48,817 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493482934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:48,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979995705] [2021-07-09 17:09:48,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:48,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:09:48,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:48,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:48,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:48,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979995705] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:48,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:48,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:09:48,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46288828] [2021-07-09 17:09:48,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:09:48,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:48,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:09:48,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:48,988 INFO L87 Difference]: Start difference. First operand 15246 states and 43831 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:49,412 INFO L93 Difference]: Finished difference Result 15940 states and 45262 transitions. [2021-07-09 17:09:49,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:09:49,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:09:49,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:49,443 INFO L225 Difference]: With dead ends: 15940 [2021-07-09 17:09:49,443 INFO L226 Difference]: Without dead ends: 15903 [2021-07-09 17:09:49,443 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:09:49,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15903 states. [2021-07-09 17:09:49,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15903 to 15141. [2021-07-09 17:09:49,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15141 states, 15140 states have (on average 2.8762879788639366) internal successors, (43547), 15140 states have internal predecessors, (43547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15141 states to 15141 states and 43547 transitions. [2021-07-09 17:09:49,838 INFO L78 Accepts]: Start accepts. Automaton has 15141 states and 43547 transitions. Word has length 35 [2021-07-09 17:09:49,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:49,838 INFO L482 AbstractCegarLoop]: Abstraction has 15141 states and 43547 transitions. [2021-07-09 17:09:49,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:49,838 INFO L276 IsEmpty]: Start isEmpty. Operand 15141 states and 43547 transitions. [2021-07-09 17:09:49,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:49,845 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:49,845 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:50,061 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:50,061 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:50,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:50,062 INFO L82 PathProgramCache]: Analyzing trace with hash 827459317, now seen corresponding path program 14 times [2021-07-09 17:09:50,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:50,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441714639] [2021-07-09 17:09:50,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:50,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:50,132 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:50,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:50,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441714639] [2021-07-09 17:09:50,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441714639] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:50,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88725561] [2021-07-09 17:09:50,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:50,157 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:50,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:50,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:50,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:50,284 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:50,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88725561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:50,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:50,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-07-09 17:09:50,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405013070] [2021-07-09 17:09:50,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:09:50,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:50,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:09:50,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:50,285 INFO L87 Difference]: Start difference. First operand 15141 states and 43547 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:50,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:50,780 INFO L93 Difference]: Finished difference Result 15119 states and 43386 transitions. [2021-07-09 17:09:50,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:50,780 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:09:50,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:50,810 INFO L225 Difference]: With dead ends: 15119 [2021-07-09 17:09:50,810 INFO L226 Difference]: Without dead ends: 15016 [2021-07-09 17:09:50,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:09:50,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15016 states. [2021-07-09 17:09:51,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15016 to 14977. [2021-07-09 17:09:51,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14977 states, 14976 states have (on average 2.878605769230769) internal successors, (43110), 14976 states have internal predecessors, (43110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-07-09 17:09:51,156 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-07-09 17:09:51,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:51,156 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-07-09 17:09:51,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:51,157 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-07-09 17:09:51,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:51,165 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:51,165 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:51,381 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-07-09 17:09:51,381 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:51,382 INFO L82 PathProgramCache]: Analyzing trace with hash 999532737, now seen corresponding path program 15 times [2021-07-09 17:09:51,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:51,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117413893] [2021-07-09 17:09:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:51,456 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:51,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:51,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117413893] [2021-07-09 17:09:51,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117413893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:51,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174163121] [2021-07-09 17:09:51,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-09 17:09:51,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:09:51,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:51,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:51,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:51,589 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:51,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174163121] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:51,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:51,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:09:51,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877300423] [2021-07-09 17:09:51,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:51,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:51,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:51,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:51,590 INFO L87 Difference]: Start difference. First operand 14977 states and 43110 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) [2021-07-09 17:09:51,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:51,845 INFO L93 Difference]: Finished difference Result 15202 states and 43548 transitions. [2021-07-09 17:09:51,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:51,846 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:09:51,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:51,878 INFO L225 Difference]: With dead ends: 15202 [2021-07-09 17:09:51,878 INFO L226 Difference]: Without dead ends: 15202 [2021-07-09 17:09:51,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 73.2ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:51,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15202 states. [2021-07-09 17:09:52,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15202 to 14977. [2021-07-09 17:09:52,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14977 states, 14976 states have (on average 2.878605769230769) internal successors, (43110), 14976 states have internal predecessors, (43110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14977 states to 14977 states and 43110 transitions. [2021-07-09 17:09:52,189 INFO L78 Accepts]: Start accepts. Automaton has 14977 states and 43110 transitions. Word has length 35 [2021-07-09 17:09:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:52,189 INFO L482 AbstractCegarLoop]: Abstraction has 14977 states and 43110 transitions. [2021-07-09 17:09:52,189 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) [2021-07-09 17:09:52,189 INFO L276 IsEmpty]: Start isEmpty. Operand 14977 states and 43110 transitions. [2021-07-09 17:09:52,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:52,196 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:52,196 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:52,413 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:52,413 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:52,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:52,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1845490552, now seen corresponding path program 10 times [2021-07-09 17:09:52,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:52,418 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38332414] [2021-07-09 17:09:52,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:52,501 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:52,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:52,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38332414] [2021-07-09 17:09:52,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38332414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:52,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529590635] [2021-07-09 17:09:52,501 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:52,524 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:52,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:52,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:09:52,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:52,619 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 27 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:09:52,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529590635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:52,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:52,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:09:52,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413381390] [2021-07-09 17:09:52,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:09:52,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:52,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:09:52,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:52,620 INFO L87 Difference]: Start difference. First operand 14977 states and 43110 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:52,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:52,872 INFO L93 Difference]: Finished difference Result 16718 states and 46945 transitions. [2021-07-09 17:09:52,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:52,873 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:09:52,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:52,916 INFO L225 Difference]: With dead ends: 16718 [2021-07-09 17:09:52,916 INFO L226 Difference]: Without dead ends: 16694 [2021-07-09 17:09:52,916 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:09:53,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16694 states. [2021-07-09 17:09:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16694 to 15013. [2021-07-09 17:09:53,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15013 states, 15012 states have (on average 2.8758326671995738) internal successors, (43172), 15012 states have internal predecessors, (43172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:53,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15013 states to 15013 states and 43172 transitions. [2021-07-09 17:09:53,458 INFO L78 Accepts]: Start accepts. Automaton has 15013 states and 43172 transitions. Word has length 35 [2021-07-09 17:09:53,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:53,458 INFO L482 AbstractCegarLoop]: Abstraction has 15013 states and 43172 transitions. [2021-07-09 17:09:53,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:53,458 INFO L276 IsEmpty]: Start isEmpty. Operand 15013 states and 43172 transitions. [2021-07-09 17:09:53,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:53,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:53,465 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:53,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:53,677 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:53,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash -731106251, now seen corresponding path program 16 times [2021-07-09 17:09:53,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:53,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366539489] [2021-07-09 17:09:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:53,740 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:53,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:53,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366539489] [2021-07-09 17:09:53,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366539489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:53,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798346806] [2021-07-09 17:09:53,741 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 [2021-07-09 17:09:53,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:09:53,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:53,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:53,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [798346806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:53,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:53,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:09:53,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745425585] [2021-07-09 17:09:53,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:53,836 INFO L87 Difference]: Start difference. First operand 15013 states and 43172 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:54,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:54,138 INFO L93 Difference]: Finished difference Result 15432 states and 43972 transitions. [2021-07-09 17:09:54,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:54,138 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:09:54,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:54,313 INFO L225 Difference]: With dead ends: 15432 [2021-07-09 17:09:54,313 INFO L226 Difference]: Without dead ends: 15289 [2021-07-09 17:09:54,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 73.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:54,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15289 states. [2021-07-09 17:09:54,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15289 to 14996. [2021-07-09 17:09:54,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14996 states, 14995 states have (on average 2.8635545181727244) internal successors, (42939), 14995 states have internal predecessors, (42939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:54,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14996 states to 14996 states and 42939 transitions. [2021-07-09 17:09:54,688 INFO L78 Accepts]: Start accepts. Automaton has 14996 states and 42939 transitions. Word has length 35 [2021-07-09 17:09:54,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:54,688 INFO L482 AbstractCegarLoop]: Abstraction has 14996 states and 42939 transitions. [2021-07-09 17:09:54,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 14996 states and 42939 transitions. [2021-07-09 17:09:54,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:54,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:54,698 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:54,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2021-07-09 17:09:54,918 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1344642431, now seen corresponding path program 17 times [2021-07-09 17:09:54,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:54,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943108439] [2021-07-09 17:09:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:54,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:54,992 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 27 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:54,992 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943108439] [2021-07-09 17:09:54,992 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943108439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:54,992 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717145998] [2021-07-09 17:09:54,992 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 [2021-07-09 17:09:55,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:09:55,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:55,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:55,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:55,067 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 28 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:09:55,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717145998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:55,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:55,068 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:09:55,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357218128] [2021-07-09 17:09:55,068 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:55,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:55,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:55,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:55,068 INFO L87 Difference]: Start difference. First operand 14996 states and 42939 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:55,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:55,291 INFO L93 Difference]: Finished difference Result 15805 states and 44721 transitions. [2021-07-09 17:09:55,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:55,292 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:09:55,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:55,326 INFO L225 Difference]: With dead ends: 15805 [2021-07-09 17:09:55,326 INFO L226 Difference]: Without dead ends: 15793 [2021-07-09 17:09:55,327 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:55,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15793 states. [2021-07-09 17:09:55,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15793 to 15263. [2021-07-09 17:09:55,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15263 states, 15262 states have (on average 2.8567029222906566) internal successors, (43599), 15262 states have internal predecessors, (43599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:55,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15263 states to 15263 states and 43599 transitions. [2021-07-09 17:09:55,850 INFO L78 Accepts]: Start accepts. Automaton has 15263 states and 43599 transitions. Word has length 35 [2021-07-09 17:09:55,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:55,850 INFO L482 AbstractCegarLoop]: Abstraction has 15263 states and 43599 transitions. [2021-07-09 17:09:55,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:55,850 INFO L276 IsEmpty]: Start isEmpty. Operand 15263 states and 43599 transitions. [2021-07-09 17:09:55,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:55,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:55,860 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:56,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-07-09 17:09:56,073 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:56,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:56,073 INFO L82 PathProgramCache]: Analyzing trace with hash 797274903, now seen corresponding path program 18 times [2021-07-09 17:09:56,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:56,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464980509] [2021-07-09 17:09:56,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:56,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:56,125 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:56,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464980509] [2021-07-09 17:09:56,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464980509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:56,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970657466] [2021-07-09 17:09:56,125 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 [2021-07-09 17:09:56,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:09:56,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:56,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:56,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:56,204 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:56,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970657466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:56,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:56,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:09:56,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383412441] [2021-07-09 17:09:56,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:56,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:56,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:56,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:56,205 INFO L87 Difference]: Start difference. First operand 15263 states and 43599 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:56,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:56,509 INFO L93 Difference]: Finished difference Result 16259 states and 45639 transitions. [2021-07-09 17:09:56,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:09:56,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:09:56,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:56,548 INFO L225 Difference]: With dead ends: 16259 [2021-07-09 17:09:56,548 INFO L226 Difference]: Without dead ends: 16247 [2021-07-09 17:09:56,548 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:09:56,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16247 states. [2021-07-09 17:09:56,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16247 to 14972. [2021-07-09 17:09:56,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14972 states, 14971 states have (on average 2.854652327833812) internal successors, (42737), 14971 states have internal predecessors, (42737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:56,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14972 states to 14972 states and 42737 transitions. [2021-07-09 17:09:56,923 INFO L78 Accepts]: Start accepts. Automaton has 14972 states and 42737 transitions. Word has length 35 [2021-07-09 17:09:56,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:56,923 INFO L482 AbstractCegarLoop]: Abstraction has 14972 states and 42737 transitions. [2021-07-09 17:09:56,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:56,923 INFO L276 IsEmpty]: Start isEmpty. Operand 14972 states and 42737 transitions. [2021-07-09 17:09:56,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:56,930 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:56,930 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:57,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:57,146 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:57,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:57,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1965133284, now seen corresponding path program 19 times [2021-07-09 17:09:57,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:57,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319258984] [2021-07-09 17:09:57,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:57,190 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:57,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:57,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319258984] [2021-07-09 17:09:57,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319258984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:57,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390235465] [2021-07-09 17:09:57,190 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 [2021-07-09 17:09:57,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:57,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:09:57,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:57,271 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 19 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:09:57,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390235465] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:57,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:57,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:09:57,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347403283] [2021-07-09 17:09:57,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:09:57,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:57,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:09:57,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:09:57,272 INFO L87 Difference]: Start difference. First operand 14972 states and 42737 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:57,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:57,528 INFO L93 Difference]: Finished difference Result 15256 states and 43217 transitions. [2021-07-09 17:09:57,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:09:57,529 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:09:57,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:57,565 INFO L225 Difference]: With dead ends: 15256 [2021-07-09 17:09:57,566 INFO L226 Difference]: Without dead ends: 15235 [2021-07-09 17:09:57,566 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 56.2ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:09:57,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15235 states. [2021-07-09 17:09:57,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15235 to 14340. [2021-07-09 17:09:57,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14340 states, 14339 states have (on average 2.861078178394588) internal successors, (41025), 14339 states have internal predecessors, (41025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:57,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14340 states to 14340 states and 41025 transitions. [2021-07-09 17:09:57,829 INFO L78 Accepts]: Start accepts. Automaton has 14340 states and 41025 transitions. Word has length 35 [2021-07-09 17:09:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:57,829 INFO L482 AbstractCegarLoop]: Abstraction has 14340 states and 41025 transitions. [2021-07-09 17:09:57,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 14340 states and 41025 transitions. [2021-07-09 17:09:57,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:57,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:57,894 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:58,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-07-09 17:09:58,094 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:58,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:58,094 INFO L82 PathProgramCache]: Analyzing trace with hash -729647013, now seen corresponding path program 11 times [2021-07-09 17:09:58,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:58,095 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276636590] [2021-07-09 17:09:58,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:58,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:58,146 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:58,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:58,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276636590] [2021-07-09 17:09:58,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276636590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:58,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858952383] [2021-07-09 17:09:58,147 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:58,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:09:58,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:58,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:58,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:58,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858952383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:58,233 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:58,233 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:09:58,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139590875] [2021-07-09 17:09:58,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:58,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:58,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:58,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:58,234 INFO L87 Difference]: Start difference. First operand 14340 states and 41025 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:58,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:58,458 INFO L93 Difference]: Finished difference Result 15289 states and 42956 transitions. [2021-07-09 17:09:58,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:58,459 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:09:58,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:58,492 INFO L225 Difference]: With dead ends: 15289 [2021-07-09 17:09:58,492 INFO L226 Difference]: Without dead ends: 15273 [2021-07-09 17:09:58,492 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 67.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:58,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15273 states. [2021-07-09 17:09:58,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15273 to 14606. [2021-07-09 17:09:58,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14606 states, 14605 states have (on average 2.8478603218076) internal successors, (41593), 14605 states have internal predecessors, (41593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14606 states to 14606 states and 41593 transitions. [2021-07-09 17:09:58,836 INFO L78 Accepts]: Start accepts. Automaton has 14606 states and 41593 transitions. Word has length 35 [2021-07-09 17:09:58,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:58,836 INFO L482 AbstractCegarLoop]: Abstraction has 14606 states and 41593 transitions. [2021-07-09 17:09:58,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:58,836 INFO L276 IsEmpty]: Start isEmpty. Operand 14606 states and 41593 transitions. [2021-07-09 17:09:58,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:58,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:58,843 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:09:59,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:09:59,059 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:09:59,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:09:59,059 INFO L82 PathProgramCache]: Analyzing trace with hash 770685979, now seen corresponding path program 20 times [2021-07-09 17:09:59,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:09:59,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352409342] [2021-07-09 17:09:59,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:09:59,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:09:59,112 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:59,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:09:59,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352409342] [2021-07-09 17:09:59,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352409342] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:59,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461536280] [2021-07-09 17:09:59,112 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 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 [2021-07-09 17:09:59,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:09:59,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:09:59,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:09:59,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:09:59,248 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 31 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:09:59,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461536280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:09:59,249 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:09:59,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:09:59,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813691773] [2021-07-09 17:09:59,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:09:59,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:09:59,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:09:59,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:09:59,249 INFO L87 Difference]: Start difference. First operand 14606 states and 41593 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:09:59,569 INFO L93 Difference]: Finished difference Result 14012 states and 39306 transitions. [2021-07-09 17:09:59,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:09:59,569 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:09:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:09:59,603 INFO L225 Difference]: With dead ends: 14012 [2021-07-09 17:09:59,603 INFO L226 Difference]: Without dead ends: 13783 [2021-07-09 17:09:59,604 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 68.9ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:09:59,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13783 states. [2021-07-09 17:09:59,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13783 to 13424. [2021-07-09 17:09:59,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13424 states, 13423 states have (on average 2.8016091782760935) internal successors, (37606), 13423 states have internal predecessors, (37606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13424 states to 13424 states and 37606 transitions. [2021-07-09 17:09:59,920 INFO L78 Accepts]: Start accepts. Automaton has 13424 states and 37606 transitions. Word has length 35 [2021-07-09 17:09:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:09:59,920 INFO L482 AbstractCegarLoop]: Abstraction has 13424 states and 37606 transitions. [2021-07-09 17:09:59,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:09:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 13424 states and 37606 transitions. [2021-07-09 17:09:59,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:09:59,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:09:59,927 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:00,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:00,129 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:00,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:00,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1491207704, now seen corresponding path program 21 times [2021-07-09 17:10:00,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:00,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870449062] [2021-07-09 17:10:00,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:00,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:00,165 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:00,165 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:00,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870449062] [2021-07-09 17:10:00,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870449062] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:00,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604140510] [2021-07-09 17:10:00,165 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 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 [2021-07-09 17:10:00,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:10:00,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:00,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:00,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:00,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604140510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:00,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:00,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:10:00,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966108794] [2021-07-09 17:10:00,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:10:00,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:00,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:10:00,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:10:00,240 INFO L87 Difference]: Start difference. First operand 13424 states and 37606 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:00,456 INFO L93 Difference]: Finished difference Result 14007 states and 38649 transitions. [2021-07-09 17:10:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:10:00,456 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:00,486 INFO L225 Difference]: With dead ends: 14007 [2021-07-09 17:10:00,487 INFO L226 Difference]: Without dead ends: 13986 [2021-07-09 17:10:00,487 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 47.0ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:00,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13986 states. [2021-07-09 17:10:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13986 to 13395. [2021-07-09 17:10:00,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13395 states, 13394 states have (on average 2.7938629236971777) internal successors, (37421), 13394 states have internal predecessors, (37421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:00,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13395 states to 13395 states and 37421 transitions. [2021-07-09 17:10:00,738 INFO L78 Accepts]: Start accepts. Automaton has 13395 states and 37421 transitions. Word has length 35 [2021-07-09 17:10:00,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:00,738 INFO L482 AbstractCegarLoop]: Abstraction has 13395 states and 37421 transitions. [2021-07-09 17:10:00,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:00,738 INFO L276 IsEmpty]: Start isEmpty. Operand 13395 states and 37421 transitions. [2021-07-09 17:10:00,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:00,745 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:00,745 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:00,961 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:00,961 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:00,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:00,961 INFO L82 PathProgramCache]: Analyzing trace with hash -463341054, now seen corresponding path program 22 times [2021-07-09 17:10:00,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:00,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339003453] [2021-07-09 17:10:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:01,053 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:01,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:01,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339003453] [2021-07-09 17:10:01,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339003453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:01,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817575497] [2021-07-09 17:10:01,054 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:10:01,102 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:01,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:01,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:01,103 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:01,183 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:01,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817575497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:01,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:01,184 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:10:01,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033520098] [2021-07-09 17:10:01,184 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:01,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:01,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:01,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:01,184 INFO L87 Difference]: Start difference. First operand 13395 states and 37421 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:01,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:01,448 INFO L93 Difference]: Finished difference Result 13987 states and 38480 transitions. [2021-07-09 17:10:01,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:01,448 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:01,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:01,479 INFO L225 Difference]: With dead ends: 13987 [2021-07-09 17:10:01,479 INFO L226 Difference]: Without dead ends: 13963 [2021-07-09 17:10:01,479 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 97.6ms TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:01,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13963 states. [2021-07-09 17:10:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13963 to 12486. [2021-07-09 17:10:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12486 states, 12485 states have (on average 2.7947937525030038) internal successors, (34893), 12485 states have internal predecessors, (34893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:01,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12486 states to 12486 states and 34893 transitions. [2021-07-09 17:10:01,766 INFO L78 Accepts]: Start accepts. Automaton has 12486 states and 34893 transitions. Word has length 35 [2021-07-09 17:10:01,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:01,767 INFO L482 AbstractCegarLoop]: Abstraction has 12486 states and 34893 transitions. [2021-07-09 17:10:01,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:01,767 INFO L276 IsEmpty]: Start isEmpty. Operand 12486 states and 34893 transitions. [2021-07-09 17:10:01,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:01,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:01,774 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:01,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-07-09 17:10:01,993 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:01,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:01,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1841063629, now seen corresponding path program 23 times [2021-07-09 17:10:01,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:01,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724917043] [2021-07-09 17:10:01,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:01,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:02,066 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:02,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:02,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724917043] [2021-07-09 17:10:02,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724917043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:02,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353076635] [2021-07-09 17:10:02,067 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 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 [2021-07-09 17:10:02,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:10:02,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:02,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:10:02,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:02,205 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:02,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353076635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:02,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:02,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:10:02,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249650829] [2021-07-09 17:10:02,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:02,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:02,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:02,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:02,206 INFO L87 Difference]: Start difference. First operand 12486 states and 34893 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:02,612 INFO L93 Difference]: Finished difference Result 12918 states and 35022 transitions. [2021-07-09 17:10:02,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:02,613 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:02,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:02,639 INFO L225 Difference]: With dead ends: 12918 [2021-07-09 17:10:02,639 INFO L226 Difference]: Without dead ends: 12852 [2021-07-09 17:10:02,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:02,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12852 states. [2021-07-09 17:10:02,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12852 to 9736. [2021-07-09 17:10:02,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9736 states, 9735 states have (on average 2.787057010785824) internal successors, (27132), 9735 states have internal predecessors, (27132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9736 states to 9736 states and 27132 transitions. [2021-07-09 17:10:02,838 INFO L78 Accepts]: Start accepts. Automaton has 9736 states and 27132 transitions. Word has length 35 [2021-07-09 17:10:02,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:02,838 INFO L482 AbstractCegarLoop]: Abstraction has 9736 states and 27132 transitions. [2021-07-09 17:10:02,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:02,838 INFO L276 IsEmpty]: Start isEmpty. Operand 9736 states and 27132 transitions. [2021-07-09 17:10:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:02,843 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:02,843 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:03,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:03,050 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:03,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:03,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1454460952, now seen corresponding path program 24 times [2021-07-09 17:10:03,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:03,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577705344] [2021-07-09 17:10:03,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:03,154 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:03,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:03,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577705344] [2021-07-09 17:10:03,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577705344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24691367] [2021-07-09 17:10:03,154 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 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 [2021-07-09 17:10:03,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-09 17:10:03,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:03,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:03,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:03,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [24691367] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:03,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:10:03,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594804009] [2021-07-09 17:10:03,234 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:03,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:03,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:03,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:03,235 INFO L87 Difference]: Start difference. First operand 9736 states and 27132 transitions. Second operand has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:03,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:03,458 INFO L93 Difference]: Finished difference Result 10128 states and 27807 transitions. [2021-07-09 17:10:03,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:03,458 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:03,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:03,474 INFO L225 Difference]: With dead ends: 10128 [2021-07-09 17:10:03,474 INFO L226 Difference]: Without dead ends: 10101 [2021-07-09 17:10:03,475 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 101.4ms TimeCoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:10:03,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10101 states. [2021-07-09 17:10:03,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10101 to 9757. [2021-07-09 17:10:03,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9757 states, 9756 states have (on average 2.7809553095530957) internal successors, (27131), 9756 states have internal predecessors, (27131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:03,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9757 states to 9757 states and 27131 transitions. [2021-07-09 17:10:03,627 INFO L78 Accepts]: Start accepts. Automaton has 9757 states and 27131 transitions. Word has length 35 [2021-07-09 17:10:03,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:03,627 INFO L482 AbstractCegarLoop]: Abstraction has 9757 states and 27131 transitions. [2021-07-09 17:10:03,627 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.4) internal successors, (34), 9 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:03,627 INFO L276 IsEmpty]: Start isEmpty. Operand 9757 states and 27131 transitions. [2021-07-09 17:10:03,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:03,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:03,632 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:03,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-07-09 17:10:03,848 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:03,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:03,848 INFO L82 PathProgramCache]: Analyzing trace with hash -208710795, now seen corresponding path program 12 times [2021-07-09 17:10:03,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:03,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513290084] [2021-07-09 17:10:03,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:03,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:03,922 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:03,922 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:03,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513290084] [2021-07-09 17:10:03,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513290084] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:03,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304775804] [2021-07-09 17:10:03,923 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 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 [2021-07-09 17:10:04,005 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:10:04,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:04,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:10:04,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:04,055 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:04,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304775804] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:04,056 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:04,056 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:10:04,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [390564457] [2021-07-09 17:10:04,056 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:04,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:04,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:04,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:04,057 INFO L87 Difference]: Start difference. First operand 9757 states and 27131 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:04,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:04,351 INFO L93 Difference]: Finished difference Result 10449 states and 28483 transitions. [2021-07-09 17:10:04,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:04,352 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:04,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:04,370 INFO L225 Difference]: With dead ends: 10449 [2021-07-09 17:10:04,370 INFO L226 Difference]: Without dead ends: 10431 [2021-07-09 17:10:04,370 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:04,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10431 states. [2021-07-09 17:10:04,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10431 to 9155. [2021-07-09 17:10:04,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9155 states, 9154 states have (on average 2.7968101376447456) internal successors, (25602), 9154 states have internal predecessors, (25602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:04,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9155 states to 9155 states and 25602 transitions. [2021-07-09 17:10:04,584 INFO L78 Accepts]: Start accepts. Automaton has 9155 states and 25602 transitions. Word has length 35 [2021-07-09 17:10:04,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:04,584 INFO L482 AbstractCegarLoop]: Abstraction has 9155 states and 25602 transitions. [2021-07-09 17:10:04,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:04,584 INFO L276 IsEmpty]: Start isEmpty. Operand 9155 states and 25602 transitions. [2021-07-09 17:10:04,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:04,589 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:04,590 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:04,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-07-09 17:10:04,809 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:04,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:04,809 INFO L82 PathProgramCache]: Analyzing trace with hash -305893054, now seen corresponding path program 25 times [2021-07-09 17:10:04,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:04,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156121496] [2021-07-09 17:10:04,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:04,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 23 proven. 0 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-07-09 17:10:04,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:04,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156121496] [2021-07-09 17:10:04,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156121496] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-09 17:10:04,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-09 17:10:04,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-07-09 17:10:04,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781970] [2021-07-09 17:10:04,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-07-09 17:10:04,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:04,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-07-09 17:10:04,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:10:04,819 INFO L87 Difference]: Start difference. First operand 9155 states and 25602 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:04,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:04,828 INFO L93 Difference]: Finished difference Result 2349 states and 5506 transitions. [2021-07-09 17:10:04,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-07-09 17:10:04,829 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:04,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:04,831 INFO L225 Difference]: With dead ends: 2349 [2021-07-09 17:10:04,831 INFO L226 Difference]: Without dead ends: 2331 [2021-07-09 17:10:04,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-07-09 17:10:04,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2331 states. [2021-07-09 17:10:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2331 to 1380. [2021-07-09 17:10:04,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3343002175489485) internal successors, (3219), 1379 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:04,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3219 transitions. [2021-07-09 17:10:04,847 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3219 transitions. Word has length 35 [2021-07-09 17:10:04,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:04,847 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3219 transitions. [2021-07-09 17:10:04,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:04,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3219 transitions. [2021-07-09 17:10:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:04,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:04,849 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:04,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2021-07-09 17:10:04,849 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:04,849 INFO L82 PathProgramCache]: Analyzing trace with hash -385601739, now seen corresponding path program 26 times [2021-07-09 17:10:04,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:04,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9364678] [2021-07-09 17:10:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:04,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:04,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9364678] [2021-07-09 17:10:04,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9364678] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:04,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101959352] [2021-07-09 17:10:04,934 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:04,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:04,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:04,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:10:04,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:05,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101959352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:05,101 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:05,101 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-07-09 17:10:05,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058370491] [2021-07-09 17:10:05,101 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:10:05,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:05,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:10:05,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:05,102 INFO L87 Difference]: Start difference. First operand 1380 states and 3219 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:05,311 INFO L93 Difference]: Finished difference Result 1429 states and 3294 transitions. [2021-07-09 17:10:05,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:05,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:05,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:05,313 INFO L225 Difference]: With dead ends: 1429 [2021-07-09 17:10:05,313 INFO L226 Difference]: Without dead ends: 1397 [2021-07-09 17:10:05,313 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:05,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-07-09 17:10:05,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 1380. [2021-07-09 17:10:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.3299492385786804) internal successors, (3213), 1379 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 3213 transitions. [2021-07-09 17:10:05,326 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 3213 transitions. Word has length 35 [2021-07-09 17:10:05,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:05,326 INFO L482 AbstractCegarLoop]: Abstraction has 1380 states and 3213 transitions. [2021-07-09 17:10:05,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,326 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 3213 transitions. [2021-07-09 17:10:05,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:05,327 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:05,327 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:05,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2021-07-09 17:10:05,545 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:05,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:05,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1551170986, now seen corresponding path program 27 times [2021-07-09 17:10:05,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:05,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209863145] [2021-07-09 17:10:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:05,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:05,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209863145] [2021-07-09 17:10:05,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209863145] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:05,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858958699] [2021-07-09 17:10:05,618 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:05,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:10:05,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:05,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:05,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:05,718 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [858958699] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:05,718 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:05,718 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:10:05,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868909161] [2021-07-09 17:10:05,718 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:05,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:05,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:05,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:05,719 INFO L87 Difference]: Start difference. First operand 1380 states and 3213 transitions. Second operand has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:05,873 INFO L93 Difference]: Finished difference Result 2071 states and 4706 transitions. [2021-07-09 17:10:05,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:10:05,874 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:05,876 INFO L225 Difference]: With dead ends: 2071 [2021-07-09 17:10:05,877 INFO L226 Difference]: Without dead ends: 2071 [2021-07-09 17:10:05,877 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 74.1ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2071 states. [2021-07-09 17:10:05,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2071 to 1527. [2021-07-09 17:10:05,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1526 states have (on average 2.4023591087811274) internal successors, (3666), 1526 states have internal predecessors, (3666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 3666 transitions. [2021-07-09 17:10:05,895 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 3666 transitions. Word has length 35 [2021-07-09 17:10:05,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:05,896 INFO L482 AbstractCegarLoop]: Abstraction has 1527 states and 3666 transitions. [2021-07-09 17:10:05,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.6666666666666665) internal successors, (33), 8 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:05,896 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 3666 transitions. [2021-07-09 17:10:05,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:05,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:05,897 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:06,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:06,105 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:06,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:06,105 INFO L82 PathProgramCache]: Analyzing trace with hash 780335319, now seen corresponding path program 13 times [2021-07-09 17:10:06,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:06,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [980762291] [2021-07-09 17:10:06,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:06,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:06,177 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:06,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:06,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [980762291] [2021-07-09 17:10:06,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [980762291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:06,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706814061] [2021-07-09 17:10:06,178 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:06,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:06,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:10:06,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:06,257 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:06,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706814061] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:06,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:06,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:10:06,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609661710] [2021-07-09 17:10:06,258 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:06,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:06,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:06,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:06,258 INFO L87 Difference]: Start difference. First operand 1527 states and 3666 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:06,466 INFO L93 Difference]: Finished difference Result 1909 states and 4411 transitions. [2021-07-09 17:10:06,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:06,466 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:06,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:06,469 INFO L225 Difference]: With dead ends: 1909 [2021-07-09 17:10:06,469 INFO L226 Difference]: Without dead ends: 1905 [2021-07-09 17:10:06,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 107.4ms TimeCoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:10:06,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-07-09 17:10:06,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 1526. [2021-07-09 17:10:06,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.40327868852459) internal successors, (3665), 1525 states have internal predecessors, (3665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3665 transitions. [2021-07-09 17:10:06,486 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3665 transitions. Word has length 35 [2021-07-09 17:10:06,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:06,486 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3665 transitions. [2021-07-09 17:10:06,486 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:06,486 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3665 transitions. [2021-07-09 17:10:06,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:06,488 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:06,488 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:06,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:06,691 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:06,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:06,691 INFO L82 PathProgramCache]: Analyzing trace with hash -852961065, now seen corresponding path program 28 times [2021-07-09 17:10:06,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:06,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81263664] [2021-07-09 17:10:06,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:06,769 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:06,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:06,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81263664] [2021-07-09 17:10:06,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81263664] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:06,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864620687] [2021-07-09 17:10:06,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:06,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:06,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:06,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:10:06,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:06,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [864620687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:06,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:06,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-07-09 17:10:06,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688906310] [2021-07-09 17:10:06,895 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:06,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:06,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:06,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:06,896 INFO L87 Difference]: Start difference. First operand 1526 states and 3665 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:07,072 INFO L93 Difference]: Finished difference Result 1563 states and 3719 transitions. [2021-07-09 17:10:07,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:10:07,073 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:07,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:07,074 INFO L225 Difference]: With dead ends: 1563 [2021-07-09 17:10:07,074 INFO L226 Difference]: Without dead ends: 1543 [2021-07-09 17:10:07,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:07,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1543 states. [2021-07-09 17:10:07,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1543 to 1526. [2021-07-09 17:10:07,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1526 states, 1525 states have (on average 2.401311475409836) internal successors, (3662), 1525 states have internal predecessors, (3662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1526 states to 1526 states and 3662 transitions. [2021-07-09 17:10:07,088 INFO L78 Accepts]: Start accepts. Automaton has 1526 states and 3662 transitions. Word has length 35 [2021-07-09 17:10:07,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:07,088 INFO L482 AbstractCegarLoop]: Abstraction has 1526 states and 3662 transitions. [2021-07-09 17:10:07,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1526 states and 3662 transitions. [2021-07-09 17:10:07,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:07,090 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:07,090 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:07,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-07-09 17:10:07,306 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash -1273583998, now seen corresponding path program 29 times [2021-07-09 17:10:07,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:07,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300281780] [2021-07-09 17:10:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:07,369 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:07,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:07,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300281780] [2021-07-09 17:10:07,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300281780] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:07,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160078422] [2021-07-09 17:10:07,370 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:07,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:10:07,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:07,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:07,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:07,526 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 18 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:07,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1160078422] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:07,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:07,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 9 [2021-07-09 17:10:07,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020089121] [2021-07-09 17:10:07,527 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:07,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:07,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:07,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:07,527 INFO L87 Difference]: Start difference. First operand 1526 states and 3662 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:07,646 INFO L93 Difference]: Finished difference Result 2415 states and 5508 transitions. [2021-07-09 17:10:07,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:07,646 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:07,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:07,649 INFO L225 Difference]: With dead ends: 2415 [2021-07-09 17:10:07,649 INFO L226 Difference]: Without dead ends: 2415 [2021-07-09 17:10:07,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 51.4ms TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:07,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2415 states. [2021-07-09 17:10:07,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2415 to 1653. [2021-07-09 17:10:07,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1653 states, 1652 states have (on average 2.4473365617433416) internal successors, (4043), 1652 states have internal predecessors, (4043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1653 states to 1653 states and 4043 transitions. [2021-07-09 17:10:07,671 INFO L78 Accepts]: Start accepts. Automaton has 1653 states and 4043 transitions. Word has length 35 [2021-07-09 17:10:07,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:07,671 INFO L482 AbstractCegarLoop]: Abstraction has 1653 states and 4043 transitions. [2021-07-09 17:10:07,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:07,671 INFO L276 IsEmpty]: Start isEmpty. Operand 1653 states and 4043 transitions. [2021-07-09 17:10:07,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:07,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:07,673 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:07,890 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:07,890 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:07,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:07,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1511645515, now seen corresponding path program 14 times [2021-07-09 17:10:07,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:07,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996905911] [2021-07-09 17:10:07,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:07,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:07,946 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:07,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:07,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996905911] [2021-07-09 17:10:07,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996905911] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:07,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488304371] [2021-07-09 17:10:07,946 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:07,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:07,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:10:07,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:08,063 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:08,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488304371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:08,063 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:08,063 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:10:08,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226345862] [2021-07-09 17:10:08,063 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:08,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:08,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:08,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:08,064 INFO L87 Difference]: Start difference. First operand 1653 states and 4043 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:08,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:08,335 INFO L93 Difference]: Finished difference Result 2638 states and 6132 transitions. [2021-07-09 17:10:08,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:08,335 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:08,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:08,339 INFO L225 Difference]: With dead ends: 2638 [2021-07-09 17:10:08,339 INFO L226 Difference]: Without dead ends: 2596 [2021-07-09 17:10:08,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 91.6ms TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:08,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-07-09 17:10:08,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1819. [2021-07-09 17:10:08,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1819 states, 1818 states have (on average 2.4592959295929595) internal successors, (4471), 1818 states have internal predecessors, (4471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:08,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1819 states to 1819 states and 4471 transitions. [2021-07-09 17:10:08,365 INFO L78 Accepts]: Start accepts. Automaton has 1819 states and 4471 transitions. Word has length 35 [2021-07-09 17:10:08,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:08,365 INFO L482 AbstractCegarLoop]: Abstraction has 1819 states and 4471 transitions. [2021-07-09 17:10:08,365 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:08,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1819 states and 4471 transitions. [2021-07-09 17:10:08,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:08,367 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:08,367 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:08,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:08,577 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:08,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:08,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1229624924, now seen corresponding path program 30 times [2021-07-09 17:10:08,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:08,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921761048] [2021-07-09 17:10:08,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:08,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:08,617 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:08,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:08,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921761048] [2021-07-09 17:10:08,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921761048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:08,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704483509] [2021-07-09 17:10:08,617 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:08,648 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:10:08,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:08,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:08,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:08,702 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:08,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704483509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:08,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:08,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:10:08,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46010939] [2021-07-09 17:10:08,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:10:08,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:08,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:10:08,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:10:08,703 INFO L87 Difference]: Start difference. First operand 1819 states and 4471 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:08,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:08,807 INFO L93 Difference]: Finished difference Result 2408 states and 5562 transitions. [2021-07-09 17:10:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:10:08,807 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:08,810 INFO L225 Difference]: With dead ends: 2408 [2021-07-09 17:10:08,811 INFO L226 Difference]: Without dead ends: 2405 [2021-07-09 17:10:08,811 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 37.4ms TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-07-09 17:10:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1818. [2021-07-09 17:10:08,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1818 states, 1817 states have (on average 2.45789763346175) internal successors, (4466), 1817 states have internal predecessors, (4466), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:08,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1818 states to 1818 states and 4466 transitions. [2021-07-09 17:10:08,841 INFO L78 Accepts]: Start accepts. Automaton has 1818 states and 4466 transitions. Word has length 35 [2021-07-09 17:10:08,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:08,841 INFO L482 AbstractCegarLoop]: Abstraction has 1818 states and 4466 transitions. [2021-07-09 17:10:08,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:08,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1818 states and 4466 transitions. [2021-07-09 17:10:08,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:08,844 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:08,844 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:09,056 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:09,085 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:09,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:09,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1436687490, now seen corresponding path program 31 times [2021-07-09 17:10:09,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:09,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708549689] [2021-07-09 17:10:09,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:09,128 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:09,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:09,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708549689] [2021-07-09 17:10:09,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708549689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:09,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068125055] [2021-07-09 17:10:09,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:09,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:09,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:09,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:09,199 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 20 proven. 20 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:09,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068125055] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:09,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:09,200 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:10:09,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768654634] [2021-07-09 17:10:09,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:10:09,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:09,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:10:09,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:10:09,200 INFO L87 Difference]: Start difference. First operand 1818 states and 4466 transitions. Second operand has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:09,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:09,278 INFO L93 Difference]: Finished difference Result 2608 states and 6106 transitions. [2021-07-09 17:10:09,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:10:09,279 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:09,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:09,283 INFO L225 Difference]: With dead ends: 2608 [2021-07-09 17:10:09,283 INFO L226 Difference]: Without dead ends: 2596 [2021-07-09 17:10:09,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 42.0ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2596 states. [2021-07-09 17:10:09,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2596 to 1953. [2021-07-09 17:10:09,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1953 states, 1952 states have (on average 2.4574795081967213) internal successors, (4797), 1952 states have internal predecessors, (4797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:09,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1953 states to 1953 states and 4797 transitions. [2021-07-09 17:10:09,313 INFO L78 Accepts]: Start accepts. Automaton has 1953 states and 4797 transitions. Word has length 35 [2021-07-09 17:10:09,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:09,314 INFO L482 AbstractCegarLoop]: Abstraction has 1953 states and 4797 transitions. [2021-07-09 17:10:09,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.125) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:09,314 INFO L276 IsEmpty]: Start isEmpty. Operand 1953 states and 4797 transitions. [2021-07-09 17:10:09,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:09,317 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:09,317 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:09,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:09,525 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:09,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:09,525 INFO L82 PathProgramCache]: Analyzing trace with hash -11312523, now seen corresponding path program 32 times [2021-07-09 17:10:09,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:09,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030998932] [2021-07-09 17:10:09,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:09,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:09,587 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 11 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:09,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:09,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030998932] [2021-07-09 17:10:09,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030998932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:09,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657597213] [2021-07-09 17:10:09,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:09,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:09,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:10:09,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 7 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:09,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657597213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:09,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:09,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-07-09 17:10:09,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147145098] [2021-07-09 17:10:09,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:10:09,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:09,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:10:09,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:10:09,682 INFO L87 Difference]: Start difference. First operand 1953 states and 4797 transitions. Second operand has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:09,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:09,919 INFO L93 Difference]: Finished difference Result 2377 states and 5580 transitions. [2021-07-09 17:10:09,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:09,920 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:09,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:09,923 INFO L225 Difference]: With dead ends: 2377 [2021-07-09 17:10:09,923 INFO L226 Difference]: Without dead ends: 2298 [2021-07-09 17:10:09,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 71.6ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:09,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2298 states. [2021-07-09 17:10:09,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2298 to 2023. [2021-07-09 17:10:09,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2023 states, 2022 states have (on average 2.4416419386745796) internal successors, (4937), 2022 states have internal predecessors, (4937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:09,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2023 states to 2023 states and 4937 transitions. [2021-07-09 17:10:09,950 INFO L78 Accepts]: Start accepts. Automaton has 2023 states and 4937 transitions. Word has length 35 [2021-07-09 17:10:09,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:09,950 INFO L482 AbstractCegarLoop]: Abstraction has 2023 states and 4937 transitions. [2021-07-09 17:10:09,950 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 5.0) internal successors, (40), 7 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:09,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2023 states and 4937 transitions. [2021-07-09 17:10:09,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:09,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:09,953 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:10,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-07-09 17:10:10,169 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:10,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:10,170 INFO L82 PathProgramCache]: Analyzing trace with hash -624848703, now seen corresponding path program 33 times [2021-07-09 17:10:10,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:10,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334410192] [2021-07-09 17:10:10,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:10,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:10,221 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 29 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:10,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:10,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334410192] [2021-07-09 17:10:10,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334410192] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:10,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844498213] [2021-07-09 17:10:10,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:10,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:10:10,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:10,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:10:10,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 30 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:10,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844498213] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:10,294 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:10,294 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-07-09 17:10:10,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549490341] [2021-07-09 17:10:10,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:10:10,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:10,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:10:10,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:10:10,295 INFO L87 Difference]: Start difference. First operand 2023 states and 4937 transitions. Second operand has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:10,434 INFO L93 Difference]: Finished difference Result 2392 states and 5647 transitions. [2021-07-09 17:10:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:10,434 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:10,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:10,438 INFO L225 Difference]: With dead ends: 2392 [2021-07-09 17:10:10,438 INFO L226 Difference]: Without dead ends: 2380 [2021-07-09 17:10:10,438 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 66.1ms TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:10,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-07-09 17:10:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2025. [2021-07-09 17:10:10,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2025 states, 2024 states have (on average 2.441205533596838) internal successors, (4941), 2024 states have internal predecessors, (4941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:10,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2025 states to 2025 states and 4941 transitions. [2021-07-09 17:10:10,468 INFO L78 Accepts]: Start accepts. Automaton has 2025 states and 4941 transitions. Word has length 35 [2021-07-09 17:10:10,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:10,468 INFO L482 AbstractCegarLoop]: Abstraction has 2025 states and 4941 transitions. [2021-07-09 17:10:10,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.375) internal successors, (35), 7 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:10,468 INFO L276 IsEmpty]: Start isEmpty. Operand 2025 states and 4941 transitions. [2021-07-09 17:10:10,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:10,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:10,471 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:10,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:10,685 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:10,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:10,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1517068631, now seen corresponding path program 34 times [2021-07-09 17:10:10,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:10,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798580317] [2021-07-09 17:10:10,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:10,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:10,733 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:10,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:10,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798580317] [2021-07-09 17:10:10,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1798580317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:10,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224510981] [2021-07-09 17:10:10,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:10,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:10,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:10,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:10:10,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:10,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224510981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:10,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:10,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:10:10,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454276972] [2021-07-09 17:10:10,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:10,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:10,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:10,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:10,821 INFO L87 Difference]: Start difference. First operand 2025 states and 4941 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:11,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:11,069 INFO L93 Difference]: Finished difference Result 3056 states and 7043 transitions. [2021-07-09 17:10:11,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:10:11,069 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:11,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:11,074 INFO L225 Difference]: With dead ends: 3056 [2021-07-09 17:10:11,075 INFO L226 Difference]: Without dead ends: 3002 [2021-07-09 17:10:11,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 115.6ms TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:11,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3002 states. [2021-07-09 17:10:11,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3002 to 2084. [2021-07-09 17:10:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2084 states, 2083 states have (on average 2.4459913586173787) internal successors, (5095), 2083 states have internal predecessors, (5095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:11,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2084 states to 2084 states and 5095 transitions. [2021-07-09 17:10:11,111 INFO L78 Accepts]: Start accepts. Automaton has 2084 states and 5095 transitions. Word has length 35 [2021-07-09 17:10:11,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:11,112 INFO L482 AbstractCegarLoop]: Abstraction has 2084 states and 5095 transitions. [2021-07-09 17:10:11,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 8 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:11,112 INFO L276 IsEmpty]: Start isEmpty. Operand 2084 states and 5095 transitions. [2021-07-09 17:10:11,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:11,114 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:11,114 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:11,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:11,329 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:11,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:11,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1245339556, now seen corresponding path program 35 times [2021-07-09 17:10:11,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:11,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633505066] [2021-07-09 17:10:11,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:11,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:11,383 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 15 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:11,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:11,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633505066] [2021-07-09 17:10:11,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633505066] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:11,384 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985408535] [2021-07-09 17:10:11,384 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:11,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:10:11,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:11,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:11,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:11,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985408535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:11,492 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:11,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-09 17:10:11,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81216398] [2021-07-09 17:10:11,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:11,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:11,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:11,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:11,493 INFO L87 Difference]: Start difference. First operand 2084 states and 5095 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:11,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:11,625 INFO L93 Difference]: Finished difference Result 2889 states and 6691 transitions. [2021-07-09 17:10:11,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:11,625 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:11,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:11,629 INFO L225 Difference]: With dead ends: 2889 [2021-07-09 17:10:11,629 INFO L226 Difference]: Without dead ends: 2865 [2021-07-09 17:10:11,629 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 73.0ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:11,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-07-09 17:10:11,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2164. [2021-07-09 17:10:11,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2164 states, 2163 states have (on average 2.4678687008784097) internal successors, (5338), 2163 states have internal predecessors, (5338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2164 states to 2164 states and 5338 transitions. [2021-07-09 17:10:11,669 INFO L78 Accepts]: Start accepts. Automaton has 2164 states and 5338 transitions. Word has length 35 [2021-07-09 17:10:11,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:11,669 INFO L482 AbstractCegarLoop]: Abstraction has 2164 states and 5338 transitions. [2021-07-09 17:10:11,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:11,669 INFO L276 IsEmpty]: Start isEmpty. Operand 2164 states and 5338 transitions. [2021-07-09 17:10:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:11,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:11,673 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:11,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-07-09 17:10:11,889 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:11,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:11,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1671905165, now seen corresponding path program 36 times [2021-07-09 17:10:11,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:11,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685922742] [2021-07-09 17:10:11,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:11,966 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:11,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:11,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685922742] [2021-07-09 17:10:11,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685922742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:11,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745535235] [2021-07-09 17:10:11,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:11,996 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:10:11,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:11,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:10:12,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 31 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:12,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745535235] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:12,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:12,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:10:12,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402079426] [2021-07-09 17:10:12,053 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:12,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:12,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:12,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:12,053 INFO L87 Difference]: Start difference. First operand 2164 states and 5338 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:12,511 INFO L93 Difference]: Finished difference Result 3794 states and 8733 transitions. [2021-07-09 17:10:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:10:12,512 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:12,517 INFO L225 Difference]: With dead ends: 3794 [2021-07-09 17:10:12,517 INFO L226 Difference]: Without dead ends: 3680 [2021-07-09 17:10:12,517 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 285.9ms TimeCoverageRelationStatistics Valid=159, Invalid=771, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:10:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3680 states. [2021-07-09 17:10:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3680 to 2276. [2021-07-09 17:10:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.474285714285714) internal successors, (5629), 2275 states have internal predecessors, (5629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5629 transitions. [2021-07-09 17:10:12,552 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5629 transitions. Word has length 35 [2021-07-09 17:10:12,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:12,552 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5629 transitions. [2021-07-09 17:10:12,552 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5629 transitions. [2021-07-09 17:10:12,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:12,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:12,555 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:12,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:12,769 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:12,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:12,769 INFO L82 PathProgramCache]: Analyzing trace with hash 2058507842, now seen corresponding path program 37 times [2021-07-09 17:10:12,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:12,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029875974] [2021-07-09 17:10:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:12,822 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:12,823 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:12,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029875974] [2021-07-09 17:10:12,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029875974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:12,823 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923223035] [2021-07-09 17:10:12,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:12,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:12,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:12,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923223035] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:12,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:12,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:10:12,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602654485] [2021-07-09 17:10:12,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:12,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:12,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:12,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:12,897 INFO L87 Difference]: Start difference. First operand 2276 states and 5629 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:13,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:13,013 INFO L93 Difference]: Finished difference Result 2985 states and 6922 transitions. [2021-07-09 17:10:13,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:10:13,013 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:13,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:13,018 INFO L225 Difference]: With dead ends: 2985 [2021-07-09 17:10:13,018 INFO L226 Difference]: Without dead ends: 2949 [2021-07-09 17:10:13,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 66.9ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:13,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2949 states. [2021-07-09 17:10:13,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2949 to 2276. [2021-07-09 17:10:13,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2276 states, 2275 states have (on average 2.4725274725274726) internal successors, (5625), 2275 states have internal predecessors, (5625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:13,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2276 states to 2276 states and 5625 transitions. [2021-07-09 17:10:13,053 INFO L78 Accepts]: Start accepts. Automaton has 2276 states and 5625 transitions. Word has length 35 [2021-07-09 17:10:13,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:13,053 INFO L482 AbstractCegarLoop]: Abstraction has 2276 states and 5625 transitions. [2021-07-09 17:10:13,053 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:13,053 INFO L276 IsEmpty]: Start isEmpty. Operand 2276 states and 5625 transitions. [2021-07-09 17:10:13,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:13,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:13,056 INFO L508 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:13,273 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:13,273 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:13,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:13,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1612213655, now seen corresponding path program 38 times [2021-07-09 17:10:13,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:13,274 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079315119] [2021-07-09 17:10:13,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:13,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:13,347 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:13,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:13,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079315119] [2021-07-09 17:10:13,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079315119] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:13,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266948341] [2021-07-09 17:10:13,347 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:13,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:13,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:13,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:10:13,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:13,437 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:13,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266948341] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:13,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:13,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:10:13,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596303009] [2021-07-09 17:10:13,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:13,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:13,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:13,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:13,438 INFO L87 Difference]: Start difference. First operand 2276 states and 5625 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:13,692 INFO L93 Difference]: Finished difference Result 3037 states and 7074 transitions. [2021-07-09 17:10:13,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:13,693 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:13,696 INFO L225 Difference]: With dead ends: 3037 [2021-07-09 17:10:13,697 INFO L226 Difference]: Without dead ends: 2881 [2021-07-09 17:10:13,697 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2881 states. [2021-07-09 17:10:13,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2881 to 2074. [2021-07-09 17:10:13,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2074 states, 2073 states have (on average 2.4582730342498795) internal successors, (5096), 2073 states have internal predecessors, (5096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:13,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2074 states to 2074 states and 5096 transitions. [2021-07-09 17:10:13,720 INFO L78 Accepts]: Start accepts. Automaton has 2074 states and 5096 transitions. Word has length 35 [2021-07-09 17:10:13,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:13,720 INFO L482 AbstractCegarLoop]: Abstraction has 2074 states and 5096 transitions. [2021-07-09 17:10:13,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:13,721 INFO L276 IsEmpty]: Start isEmpty. Operand 2074 states and 5096 transitions. [2021-07-09 17:10:13,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:13,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:13,723 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:13,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:13,941 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:13,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:13,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1374152138, now seen corresponding path program 15 times [2021-07-09 17:10:13,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:13,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120937051] [2021-07-09 17:10:13,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:13,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:13,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120937051] [2021-07-09 17:10:13,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120937051] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:13,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269997371] [2021-07-09 17:10:13,996 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:14,022 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:10:14,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:14,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:14,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:14,073 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:14,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269997371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:14,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:14,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 8 [2021-07-09 17:10:14,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433287713] [2021-07-09 17:10:14,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:14,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:14,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:14,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:14,074 INFO L87 Difference]: Start difference. First operand 2074 states and 5096 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:14,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:14,242 INFO L93 Difference]: Finished difference Result 2850 states and 6708 transitions. [2021-07-09 17:10:14,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:14,242 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:14,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:14,246 INFO L225 Difference]: With dead ends: 2850 [2021-07-09 17:10:14,246 INFO L226 Difference]: Without dead ends: 2832 [2021-07-09 17:10:14,246 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 62.9ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2832 states. [2021-07-09 17:10:14,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2832 to 2298. [2021-07-09 17:10:14,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2298 states, 2297 states have (on average 2.4902046147148456) internal successors, (5720), 2297 states have internal predecessors, (5720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:14,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2298 states to 2298 states and 5720 transitions. [2021-07-09 17:10:14,275 INFO L78 Accepts]: Start accepts. Automaton has 2298 states and 5720 transitions. Word has length 35 [2021-07-09 17:10:14,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:14,276 INFO L482 AbstractCegarLoop]: Abstraction has 2298 states and 5720 transitions. [2021-07-09 17:10:14,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:14,276 INFO L276 IsEmpty]: Start isEmpty. Operand 2298 states and 5720 transitions. [2021-07-09 17:10:14,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:14,278 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:14,278 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:14,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-07-09 17:10:14,481 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:14,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:14,481 INFO L82 PathProgramCache]: Analyzing trace with hash 752271728, now seen corresponding path program 16 times [2021-07-09 17:10:14,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:14,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904943165] [2021-07-09 17:10:14,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:14,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:14,531 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 32 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:14,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:14,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904943165] [2021-07-09 17:10:14,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904943165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:14,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799136165] [2021-07-09 17:10:14,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:14,555 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:14,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:14,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:10:14,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:14,618 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 33 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:14,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799136165] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:14,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:14,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-07-09 17:10:14,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324852334] [2021-07-09 17:10:14,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:14,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:14,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:14,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:14,619 INFO L87 Difference]: Start difference. First operand 2298 states and 5720 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:14,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:14,833 INFO L93 Difference]: Finished difference Result 2847 states and 6724 transitions. [2021-07-09 17:10:14,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:14,833 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:14,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:14,865 INFO L225 Difference]: With dead ends: 2847 [2021-07-09 17:10:14,865 INFO L226 Difference]: Without dead ends: 2847 [2021-07-09 17:10:14,865 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 117.7ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:14,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2847 states. [2021-07-09 17:10:14,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2847 to 2179. [2021-07-09 17:10:14,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2179 states, 2178 states have (on average 2.4724517906336088) internal successors, (5385), 2178 states have internal predecessors, (5385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:14,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2179 states to 2179 states and 5385 transitions. [2021-07-09 17:10:14,925 INFO L78 Accepts]: Start accepts. Automaton has 2179 states and 5385 transitions. Word has length 35 [2021-07-09 17:10:14,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:14,925 INFO L482 AbstractCegarLoop]: Abstraction has 2179 states and 5385 transitions. [2021-07-09 17:10:14,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:14,925 INFO L276 IsEmpty]: Start isEmpty. Operand 2179 states and 5385 transitions. [2021-07-09 17:10:14,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-07-09 17:10:14,927 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:14,927 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:15,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,105 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:15,142 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:15,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:15,142 INFO L82 PathProgramCache]: Analyzing trace with hash -789180772, now seen corresponding path program 39 times [2021-07-09 17:10:15,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:15,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352489782] [2021-07-09 17:10:15,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:15,211 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:15,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:15,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352489782] [2021-07-09 17:10:15,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352489782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:15,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849350248] [2021-07-09 17:10:15,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:15,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-09 17:10:15,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:15,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-09 17:10:15,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:15,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849350248] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:15,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:15,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:10:15,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898024199] [2021-07-09 17:10:15,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:15,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:15,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:15,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:15,290 INFO L87 Difference]: Start difference. First operand 2179 states and 5385 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:15,446 INFO L93 Difference]: Finished difference Result 2663 states and 6272 transitions. [2021-07-09 17:10:15,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:15,446 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-07-09 17:10:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:15,450 INFO L225 Difference]: With dead ends: 2663 [2021-07-09 17:10:15,450 INFO L226 Difference]: Without dead ends: 2616 [2021-07-09 17:10:15,450 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 93.3ms TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:10:15,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2616 states. [2021-07-09 17:10:15,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2616 to 2188. [2021-07-09 17:10:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2188 states, 2187 states have (on average 2.4686785550983084) internal successors, (5399), 2187 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:15,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2188 states to 2188 states and 5399 transitions. [2021-07-09 17:10:15,479 INFO L78 Accepts]: Start accepts. Automaton has 2188 states and 5399 transitions. Word has length 35 [2021-07-09 17:10:15,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:15,479 INFO L482 AbstractCegarLoop]: Abstraction has 2188 states and 5399 transitions. [2021-07-09 17:10:15,480 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 10 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:15,480 INFO L276 IsEmpty]: Start isEmpty. Operand 2188 states and 5399 transitions. [2021-07-09 17:10:15,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:15,481 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:15,482 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:15,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:15,697 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:15,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:15,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1018494725, now seen corresponding path program 40 times [2021-07-09 17:10:15,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:15,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633158672] [2021-07-09 17:10:15,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:15,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:15,742 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:15,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:15,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633158672] [2021-07-09 17:10:15,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633158672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:15,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092659753] [2021-07-09 17:10:15,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:15,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:15,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:15,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:10:15,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 22 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:15,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092659753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:15,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:15,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-07-09 17:10:15,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105928728] [2021-07-09 17:10:15,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:15,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:15,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:15,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:15,937 INFO L87 Difference]: Start difference. First operand 2188 states and 5399 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:16,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:16,713 INFO L93 Difference]: Finished difference Result 3588 states and 8244 transitions. [2021-07-09 17:10:16,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:10:16,713 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:16,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:16,718 INFO L225 Difference]: With dead ends: 3588 [2021-07-09 17:10:16,718 INFO L226 Difference]: Without dead ends: 3550 [2021-07-09 17:10:16,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 424.4ms TimeCoverageRelationStatistics Valid=345, Invalid=1215, Unknown=0, NotChecked=0, Total=1560 [2021-07-09 17:10:16,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-07-09 17:10:16,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2578. [2021-07-09 17:10:16,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.43500194024059) internal successors, (6275), 2577 states have internal predecessors, (6275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 6275 transitions. [2021-07-09 17:10:16,755 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 6275 transitions. Word has length 38 [2021-07-09 17:10:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:16,755 INFO L482 AbstractCegarLoop]: Abstraction has 2578 states and 6275 transitions. [2021-07-09 17:10:16,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 6275 transitions. [2021-07-09 17:10:16,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:16,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:16,758 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:16,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:16,960 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:16,960 INFO L82 PathProgramCache]: Analyzing trace with hash 988310311, now seen corresponding path program 41 times [2021-07-09 17:10:16,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:16,961 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852558882] [2021-07-09 17:10:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:16,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:17,007 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:10:17,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:17,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852558882] [2021-07-09 17:10:17,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852558882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:17,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217740697] [2021-07-09 17:10:17,007 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:17,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:10:17,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:17,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:10:17,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:17,089 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:10:17,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217740697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:17,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:17,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:10:17,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265801940] [2021-07-09 17:10:17,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:10:17,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:17,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:10:17,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:10:17,090 INFO L87 Difference]: Start difference. First operand 2578 states and 6275 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) [2021-07-09 17:10:17,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:17,244 INFO L93 Difference]: Finished difference Result 3224 states and 7683 transitions. [2021-07-09 17:10:17,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:10:17,245 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.142857142857143) internal successors, (36), 6 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:17,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:17,249 INFO L225 Difference]: With dead ends: 3224 [2021-07-09 17:10:17,250 INFO L226 Difference]: Without dead ends: 3189 [2021-07-09 17:10:17,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:10:17,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3189 states. [2021-07-09 17:10:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3189 to 2741. [2021-07-09 17:10:17,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2741 states, 2740 states have (on average 2.4572992700729928) internal successors, (6733), 2740 states have internal predecessors, (6733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:17,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2741 states to 2741 states and 6733 transitions. [2021-07-09 17:10:17,295 INFO L78 Accepts]: Start accepts. Automaton has 2741 states and 6733 transitions. Word has length 38 [2021-07-09 17:10:17,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:17,295 INFO L482 AbstractCegarLoop]: Abstraction has 2741 states and 6733 transitions. [2021-07-09 17:10:17,295 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) [2021-07-09 17:10:17,295 INFO L276 IsEmpty]: Start isEmpty. Operand 2741 states and 6733 transitions. [2021-07-09 17:10:17,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:17,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:17,298 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:17,500 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-07-09 17:10:17,500 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:17,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:17,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1650028221, now seen corresponding path program 42 times [2021-07-09 17:10:17,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:17,501 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98759861] [2021-07-09 17:10:17,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:17,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:17,574 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:10:17,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:17,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98759861] [2021-07-09 17:10:17,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98759861] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:17,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032448036] [2021-07-09 17:10:17,574 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:17,602 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:10:17,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:17,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-09 17:10:17,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:17,738 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 10 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:17,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032448036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:17,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:17,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-07-09 17:10:17,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631446423] [2021-07-09 17:10:17,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:10:17,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:17,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:10:17,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:17,739 INFO L87 Difference]: Start difference. First operand 2741 states and 6733 transitions. Second operand has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:18,305 INFO L93 Difference]: Finished difference Result 4464 states and 10129 transitions. [2021-07-09 17:10:18,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:10:18,305 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:18,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:18,312 INFO L225 Difference]: With dead ends: 4464 [2021-07-09 17:10:18,312 INFO L226 Difference]: Without dead ends: 4401 [2021-07-09 17:10:18,312 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 239.1ms TimeCoverageRelationStatistics Valid=158, Invalid=598, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:10:18,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4401 states. [2021-07-09 17:10:18,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4401 to 2892. [2021-07-09 17:10:18,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2892 states, 2891 states have (on average 2.4787270840539604) internal successors, (7166), 2891 states have internal predecessors, (7166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2892 states to 2892 states and 7166 transitions. [2021-07-09 17:10:18,359 INFO L78 Accepts]: Start accepts. Automaton has 2892 states and 7166 transitions. Word has length 38 [2021-07-09 17:10:18,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:18,360 INFO L482 AbstractCegarLoop]: Abstraction has 2892 states and 7166 transitions. [2021-07-09 17:10:18,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.538461538461538) internal successors, (72), 12 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,360 INFO L276 IsEmpty]: Start isEmpty. Operand 2892 states and 7166 transitions. [2021-07-09 17:10:18,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-07-09 17:10:18,363 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:18,363 INFO L508 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:18,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:18,580 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:18,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:18,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1035175619, now seen corresponding path program 43 times [2021-07-09 17:10:18,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:18,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352911927] [2021-07-09 17:10:18,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:18,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:18,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:18,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352911927] [2021-07-09 17:10:18,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352911927] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:18,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691766768] [2021-07-09 17:10:18,617 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:18,642 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:10:18,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:18,689 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:18,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691766768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:18,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:18,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-07-09 17:10:18,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809391947] [2021-07-09 17:10:18,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-09 17:10:18,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:18,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-09 17:10:18,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:10:18,690 INFO L87 Difference]: Start difference. First operand 2892 states and 7166 transitions. Second operand has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:18,824 INFO L93 Difference]: Finished difference Result 3617 states and 8704 transitions. [2021-07-09 17:10:18,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-09 17:10:18,824 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-07-09 17:10:18,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:18,830 INFO L225 Difference]: With dead ends: 3617 [2021-07-09 17:10:18,830 INFO L226 Difference]: Without dead ends: 3592 [2021-07-09 17:10:18,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.1ms TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-07-09 17:10:18,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3592 states. [2021-07-09 17:10:18,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3592 to 3175. [2021-07-09 17:10:18,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3175 states, 3174 states have (on average 2.4697542533081287) internal successors, (7839), 3174 states have internal predecessors, (7839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3175 states to 3175 states and 7839 transitions. [2021-07-09 17:10:18,871 INFO L78 Accepts]: Start accepts. Automaton has 3175 states and 7839 transitions. Word has length 38 [2021-07-09 17:10:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:18,872 INFO L482 AbstractCegarLoop]: Abstraction has 3175 states and 7839 transitions. [2021-07-09 17:10:18,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 5.285714285714286) internal successors, (37), 6 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3175 states and 7839 transitions. [2021-07-09 17:10:18,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:18,875 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:18,875 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:19,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-07-09 17:10:19,076 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:19,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:19,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1350282616, now seen corresponding path program 17 times [2021-07-09 17:10:19,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:19,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389401356] [2021-07-09 17:10:19,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:19,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:19,184 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:19,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:19,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389401356] [2021-07-09 17:10:19,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389401356] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:19,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432722122] [2021-07-09 17:10:19,184 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:19,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:10:19,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:19,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:19,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:19,284 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:19,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432722122] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:19,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:19,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:10:19,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903375535] [2021-07-09 17:10:19,285 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:10:19,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:19,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:10:19,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:19,285 INFO L87 Difference]: Start difference. First operand 3175 states and 7839 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:19,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:19,735 INFO L93 Difference]: Finished difference Result 4225 states and 9893 transitions. [2021-07-09 17:10:19,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:10:19,735 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:19,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:19,742 INFO L225 Difference]: With dead ends: 4225 [2021-07-09 17:10:19,742 INFO L226 Difference]: Without dead ends: 4189 [2021-07-09 17:10:19,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 231.3ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:10:19,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4189 states. [2021-07-09 17:10:19,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4189 to 3084. [2021-07-09 17:10:19,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.480051897502433) internal successors, (7646), 3083 states have internal predecessors, (7646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:19,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7646 transitions. [2021-07-09 17:10:19,788 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7646 transitions. Word has length 41 [2021-07-09 17:10:19,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:19,788 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7646 transitions. [2021-07-09 17:10:19,788 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:19,788 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7646 transitions. [2021-07-09 17:10:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:19,792 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:19,792 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:20,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:20,005 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:20,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:20,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1492128392, now seen corresponding path program 44 times [2021-07-09 17:10:20,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:20,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767068178] [2021-07-09 17:10:20,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:20,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:20,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:20,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767068178] [2021-07-09 17:10:20,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767068178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:20,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655215441] [2021-07-09 17:10:20,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:20,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:20,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:20,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:20,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:20,298 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:20,298 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655215441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:20,298 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:20,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-07-09 17:10:20,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126036681] [2021-07-09 17:10:20,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:10:20,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:20,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:10:20,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:20,299 INFO L87 Difference]: Start difference. First operand 3084 states and 7646 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:20,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:20,854 INFO L93 Difference]: Finished difference Result 3304 states and 7993 transitions. [2021-07-09 17:10:20,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:20,855 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:20,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:20,859 INFO L225 Difference]: With dead ends: 3304 [2021-07-09 17:10:20,859 INFO L226 Difference]: Without dead ends: 3236 [2021-07-09 17:10:20,860 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:20,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-07-09 17:10:20,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 3084. [2021-07-09 17:10:20,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 2.474862147259163) internal successors, (7630), 3083 states have internal predecessors, (7630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:20,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 7630 transitions. [2021-07-09 17:10:20,901 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 7630 transitions. Word has length 41 [2021-07-09 17:10:20,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:20,901 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 7630 transitions. [2021-07-09 17:10:20,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:20,901 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 7630 transitions. [2021-07-09 17:10:20,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:20,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:20,905 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:21,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable209 [2021-07-09 17:10:21,106 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:21,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:21,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1073103992, now seen corresponding path program 45 times [2021-07-09 17:10:21,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:21,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763340098] [2021-07-09 17:10:21,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:21,187 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:21,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:21,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763340098] [2021-07-09 17:10:21,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763340098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:21,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657443828] [2021-07-09 17:10:21,187 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:21,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:10:21,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:21,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:21,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:21,279 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:21,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657443828] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:21,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:21,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:10:21,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603864281] [2021-07-09 17:10:21,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:21,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:21,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:21,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:21,280 INFO L87 Difference]: Start difference. First operand 3084 states and 7630 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:21,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:21,531 INFO L93 Difference]: Finished difference Result 3450 states and 8325 transitions. [2021-07-09 17:10:21,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:21,531 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:21,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:21,536 INFO L225 Difference]: With dead ends: 3450 [2021-07-09 17:10:21,536 INFO L226 Difference]: Without dead ends: 3450 [2021-07-09 17:10:21,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:21,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3450 states. [2021-07-09 17:10:21,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3450 to 3096. [2021-07-09 17:10:21,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3096 states, 3095 states have (on average 2.477221324717286) internal successors, (7667), 3095 states have internal predecessors, (7667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:21,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3096 states to 3096 states and 7667 transitions. [2021-07-09 17:10:21,580 INFO L78 Accepts]: Start accepts. Automaton has 3096 states and 7667 transitions. Word has length 41 [2021-07-09 17:10:21,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:21,580 INFO L482 AbstractCegarLoop]: Abstraction has 3096 states and 7667 transitions. [2021-07-09 17:10:21,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:21,581 INFO L276 IsEmpty]: Start isEmpty. Operand 3096 states and 7667 transitions. [2021-07-09 17:10:21,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:21,584 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:21,584 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:21,801 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-07-09 17:10:21,801 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash 665060437, now seen corresponding path program 18 times [2021-07-09 17:10:21,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:21,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438001909] [2021-07-09 17:10:21,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:21,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:21,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438001909] [2021-07-09 17:10:21,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438001909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:21,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499471310] [2021-07-09 17:10:21,903 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:22,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:10:22,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:22,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:22,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:22,138 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 41 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:22,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499471310] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:22,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:22,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-07-09 17:10:22,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865582418] [2021-07-09 17:10:22,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:10:22,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:22,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:10:22,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:10:22,140 INFO L87 Difference]: Start difference. First operand 3096 states and 7667 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:22,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:22,368 INFO L93 Difference]: Finished difference Result 4321 states and 10236 transitions. [2021-07-09 17:10:22,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:22,368 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:22,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:22,375 INFO L225 Difference]: With dead ends: 4321 [2021-07-09 17:10:22,375 INFO L226 Difference]: Without dead ends: 4263 [2021-07-09 17:10:22,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 164.5ms TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4263 states. [2021-07-09 17:10:22,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4263 to 3240. [2021-07-09 17:10:22,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3240 states, 3239 states have (on average 2.4902747761654833) internal successors, (8066), 3239 states have internal predecessors, (8066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:22,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3240 states to 3240 states and 8066 transitions. [2021-07-09 17:10:22,426 INFO L78 Accepts]: Start accepts. Automaton has 3240 states and 8066 transitions. Word has length 41 [2021-07-09 17:10:22,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:22,426 INFO L482 AbstractCegarLoop]: Abstraction has 3240 states and 8066 transitions. [2021-07-09 17:10:22,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:22,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3240 states and 8066 transitions. [2021-07-09 17:10:22,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:22,430 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:22,430 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:22,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2021-07-09 17:10:22,647 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:22,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:22,647 INFO L82 PathProgramCache]: Analyzing trace with hash 9364347, now seen corresponding path program 19 times [2021-07-09 17:10:22,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:22,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817607787] [2021-07-09 17:10:22,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:22,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:22,692 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:22,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:22,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817607787] [2021-07-09 17:10:22,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817607787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:22,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561129584] [2021-07-09 17:10:22,692 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:22,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:22,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:22,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561129584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:22,800 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:22,800 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-09 17:10:22,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281079896] [2021-07-09 17:10:22,800 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:22,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:22,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:22,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:22,801 INFO L87 Difference]: Start difference. First operand 3240 states and 8066 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:22,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:22,949 INFO L93 Difference]: Finished difference Result 4797 states and 11528 transitions. [2021-07-09 17:10:22,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:22,950 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:22,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:22,957 INFO L225 Difference]: With dead ends: 4797 [2021-07-09 17:10:22,958 INFO L226 Difference]: Without dead ends: 4797 [2021-07-09 17:10:22,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 51.2ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:22,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4797 states. [2021-07-09 17:10:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4797 to 3486. [2021-07-09 17:10:23,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.5265423242467717) internal successors, (8805), 3485 states have internal predecessors, (8805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:23,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8805 transitions. [2021-07-09 17:10:23,029 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8805 transitions. Word has length 41 [2021-07-09 17:10:23,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:23,029 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 8805 transitions. [2021-07-09 17:10:23,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:23,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8805 transitions. [2021-07-09 17:10:23,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:23,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:23,033 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:23,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:23,250 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:23,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:23,250 INFO L82 PathProgramCache]: Analyzing trace with hash -524501029, now seen corresponding path program 46 times [2021-07-09 17:10:23,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:23,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226775163] [2021-07-09 17:10:23,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:23,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:23,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226775163] [2021-07-09 17:10:23,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226775163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:23,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685907837] [2021-07-09 17:10:23,305 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:23,333 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:23,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:23,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:23,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:23,399 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:23,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685907837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:23,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:23,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:10:23,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504691254] [2021-07-09 17:10:23,399 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:23,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:23,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:23,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:23,400 INFO L87 Difference]: Start difference. First operand 3486 states and 8805 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:23,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:23,525 INFO L93 Difference]: Finished difference Result 3733 states and 9242 transitions. [2021-07-09 17:10:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:10:23,525 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:23,531 INFO L225 Difference]: With dead ends: 3733 [2021-07-09 17:10:23,531 INFO L226 Difference]: Without dead ends: 3727 [2021-07-09 17:10:23,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:23,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3727 states. [2021-07-09 17:10:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3727 to 3447. [2021-07-09 17:10:23,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3447 states, 3446 states have (on average 2.5194428322692977) internal successors, (8682), 3446 states have internal predecessors, (8682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:23,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3447 states to 3447 states and 8682 transitions. [2021-07-09 17:10:23,589 INFO L78 Accepts]: Start accepts. Automaton has 3447 states and 8682 transitions. Word has length 41 [2021-07-09 17:10:23,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:23,589 INFO L482 AbstractCegarLoop]: Abstraction has 3447 states and 8682 transitions. [2021-07-09 17:10:23,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:23,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3447 states and 8682 transitions. [2021-07-09 17:10:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:23,593 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:23,594 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:23,810 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-07-09 17:10:23,810 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:23,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:23,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1583917210, now seen corresponding path program 20 times [2021-07-09 17:10:23,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:23,811 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209151229] [2021-07-09 17:10:23,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:23,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:23,878 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:23,878 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:23,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209151229] [2021-07-09 17:10:23,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209151229] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:23,878 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480423593] [2021-07-09 17:10:23,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:23,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:23,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:23,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:23,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:23,970 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:23,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480423593] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:23,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:23,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:10:23,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794940894] [2021-07-09 17:10:23,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:23,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:23,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:23,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:23,972 INFO L87 Difference]: Start difference. First operand 3447 states and 8682 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:24,217 INFO L93 Difference]: Finished difference Result 4309 states and 10396 transitions. [2021-07-09 17:10:24,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:24,218 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:24,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:24,223 INFO L225 Difference]: With dead ends: 4309 [2021-07-09 17:10:24,223 INFO L226 Difference]: Without dead ends: 4278 [2021-07-09 17:10:24,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 92.5ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-07-09 17:10:24,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3497. [2021-07-09 17:10:24,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3497 states, 3496 states have (on average 2.5160183066361554) internal successors, (8796), 3496 states have internal predecessors, (8796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3497 states to 3497 states and 8796 transitions. [2021-07-09 17:10:24,279 INFO L78 Accepts]: Start accepts. Automaton has 3497 states and 8796 transitions. Word has length 41 [2021-07-09 17:10:24,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:24,279 INFO L482 AbstractCegarLoop]: Abstraction has 3497 states and 8796 transitions. [2021-07-09 17:10:24,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3497 states and 8796 transitions. [2021-07-09 17:10:24,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:24,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:24,283 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:24,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable222,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:24,499 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:24,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:24,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1157353229, now seen corresponding path program 47 times [2021-07-09 17:10:24,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:24,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400424138] [2021-07-09 17:10:24,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:24,550 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 32 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:24,550 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:24,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400424138] [2021-07-09 17:10:24,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400424138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:24,550 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955085494] [2021-07-09 17:10:24,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:24,576 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:10:24,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:24,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:24,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:24,649 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:24,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955085494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:24,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:24,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 11 [2021-07-09 17:10:24,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878854454] [2021-07-09 17:10:24,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:10:24,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:24,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:10:24,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:24,650 INFO L87 Difference]: Start difference. First operand 3497 states and 8796 transitions. Second operand has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:24,827 INFO L93 Difference]: Finished difference Result 4421 states and 10653 transitions. [2021-07-09 17:10:24,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:24,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:24,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:24,834 INFO L225 Difference]: With dead ends: 4421 [2021-07-09 17:10:24,834 INFO L226 Difference]: Without dead ends: 4412 [2021-07-09 17:10:24,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 68.3ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:24,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4412 states. [2021-07-09 17:10:24,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4412 to 3587. [2021-07-09 17:10:24,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5312325711098715) internal successors, (9077), 3586 states have internal predecessors, (9077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9077 transitions. [2021-07-09 17:10:24,888 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9077 transitions. Word has length 41 [2021-07-09 17:10:24,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:24,888 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9077 transitions. [2021-07-09 17:10:24,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.583333333333333) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:24,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9077 transitions. [2021-07-09 17:10:24,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:24,892 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:24,892 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:25,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-07-09 17:10:25,105 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:25,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:25,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1364415795, now seen corresponding path program 48 times [2021-07-09 17:10:25,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:25,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662451718] [2021-07-09 17:10:25,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:25,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:25,151 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:25,151 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662451718] [2021-07-09 17:10:25,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662451718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:25,151 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553650207] [2021-07-09 17:10:25,152 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:25,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:10:25,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:25,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:25,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:25,247 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 35 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:25,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553650207] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:25,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:25,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:10:25,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45162848] [2021-07-09 17:10:25,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:25,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:25,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:25,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:25,248 INFO L87 Difference]: Start difference. First operand 3587 states and 9077 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:25,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:25,398 INFO L93 Difference]: Finished difference Result 4253 states and 10263 transitions. [2021-07-09 17:10:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:25,398 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:25,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:25,405 INFO L225 Difference]: With dead ends: 4253 [2021-07-09 17:10:25,405 INFO L226 Difference]: Without dead ends: 4235 [2021-07-09 17:10:25,405 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:25,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-07-09 17:10:25,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3587. [2021-07-09 17:10:25,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3587 states, 3586 states have (on average 2.5284439486893473) internal successors, (9067), 3586 states have internal predecessors, (9067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3587 states to 3587 states and 9067 transitions. [2021-07-09 17:10:25,465 INFO L78 Accepts]: Start accepts. Automaton has 3587 states and 9067 transitions. Word has length 41 [2021-07-09 17:10:25,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:25,465 INFO L482 AbstractCegarLoop]: Abstraction has 3587 states and 9067 transitions. [2021-07-09 17:10:25,465 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:25,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3587 states and 9067 transitions. [2021-07-09 17:10:25,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:25,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:25,470 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:25,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-07-09 17:10:25,687 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:25,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:25,687 INFO L82 PathProgramCache]: Analyzing trace with hash -83584218, now seen corresponding path program 49 times [2021-07-09 17:10:25,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:25,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341060666] [2021-07-09 17:10:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:25,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:25,760 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:25,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:25,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341060666] [2021-07-09 17:10:25,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341060666] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:25,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327613011] [2021-07-09 17:10:25,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:25,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:25,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:25,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327613011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:25,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:25,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:10:25,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39106691] [2021-07-09 17:10:25,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:25,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:25,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:25,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:25,876 INFO L87 Difference]: Start difference. First operand 3587 states and 9067 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:26,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:26,287 INFO L93 Difference]: Finished difference Result 4054 states and 9921 transitions. [2021-07-09 17:10:26,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:26,288 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:26,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:26,294 INFO L225 Difference]: With dead ends: 4054 [2021-07-09 17:10:26,294 INFO L226 Difference]: Without dead ends: 4016 [2021-07-09 17:10:26,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:26,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-07-09 17:10:26,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3593. [2021-07-09 17:10:26,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3593 states, 3592 states have (on average 2.525055679287305) internal successors, (9070), 3592 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:26,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3593 states to 3593 states and 9070 transitions. [2021-07-09 17:10:26,354 INFO L78 Accepts]: Start accepts. Automaton has 3593 states and 9070 transitions. Word has length 41 [2021-07-09 17:10:26,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:26,354 INFO L482 AbstractCegarLoop]: Abstraction has 3593 states and 9070 transitions. [2021-07-09 17:10:26,354 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:26,354 INFO L276 IsEmpty]: Start isEmpty. Operand 3593 states and 9070 transitions. [2021-07-09 17:10:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:26,359 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:26,359 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:26,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2021-07-09 17:10:26,575 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:26,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:26,575 INFO L82 PathProgramCache]: Analyzing trace with hash -697120398, now seen corresponding path program 50 times [2021-07-09 17:10:26,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:26,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439131684] [2021-07-09 17:10:26,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:26,641 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:26,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439131684] [2021-07-09 17:10:26,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439131684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:26,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664706612] [2021-07-09 17:10:26,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:26,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:26,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:26,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:26,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:26,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664706612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:26,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:26,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:10:26,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448600945] [2021-07-09 17:10:26,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:26,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:26,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:26,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:26,731 INFO L87 Difference]: Start difference. First operand 3593 states and 9070 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:26,990 INFO L93 Difference]: Finished difference Result 4259 states and 10390 transitions. [2021-07-09 17:10:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:26,991 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:26,997 INFO L225 Difference]: With dead ends: 4259 [2021-07-09 17:10:26,997 INFO L226 Difference]: Without dead ends: 4247 [2021-07-09 17:10:26,997 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-07-09 17:10:27,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3595. [2021-07-09 17:10:27,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3595 states, 3594 states have (on average 2.5242070116861437) internal successors, (9072), 3594 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:27,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3595 states to 3595 states and 9072 transitions. [2021-07-09 17:10:27,061 INFO L78 Accepts]: Start accepts. Automaton has 3595 states and 9072 transitions. Word has length 41 [2021-07-09 17:10:27,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:27,061 INFO L482 AbstractCegarLoop]: Abstraction has 3595 states and 9072 transitions. [2021-07-09 17:10:27,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:27,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3595 states and 9072 transitions. [2021-07-09 17:10:27,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:27,065 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:27,065 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:27,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:27,269 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:27,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:27,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1444796936, now seen corresponding path program 51 times [2021-07-09 17:10:27,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:27,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066058676] [2021-07-09 17:10:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:27,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:27,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066058676] [2021-07-09 17:10:27,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066058676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:27,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554335932] [2021-07-09 17:10:27,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:27,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:10:27,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:27,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:27,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:27,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554335932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:27,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:27,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:10:27,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605916763] [2021-07-09 17:10:27,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:27,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:27,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:27,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:27,436 INFO L87 Difference]: Start difference. First operand 3595 states and 9072 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:27,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:27,758 INFO L93 Difference]: Finished difference Result 4613 states and 11146 transitions. [2021-07-09 17:10:27,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:27,758 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:27,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:27,765 INFO L225 Difference]: With dead ends: 4613 [2021-07-09 17:10:27,766 INFO L226 Difference]: Without dead ends: 4601 [2021-07-09 17:10:27,766 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 116.6ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:27,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4601 states. [2021-07-09 17:10:27,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4601 to 3620. [2021-07-09 17:10:27,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 2.5230726720088423) internal successors, (9131), 3619 states have internal predecessors, (9131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:27,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 9131 transitions. [2021-07-09 17:10:27,832 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 9131 transitions. Word has length 41 [2021-07-09 17:10:27,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:27,832 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 9131 transitions. [2021-07-09 17:10:27,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:27,832 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 9131 transitions. [2021-07-09 17:10:27,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:27,836 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:27,836 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:28,052 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:28,053 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:28,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:28,053 INFO L82 PathProgramCache]: Analyzing trace with hash 1206735419, now seen corresponding path program 21 times [2021-07-09 17:10:28,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:28,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270981693] [2021-07-09 17:10:28,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:28,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:28,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:28,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270981693] [2021-07-09 17:10:28,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270981693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:28,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332706558] [2021-07-09 17:10:28,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:28,132 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:10:28,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:28,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:28,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:28,201 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:28,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332706558] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:28,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:28,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-09 17:10:28,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530142396] [2021-07-09 17:10:28,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:28,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:28,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:28,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:28,202 INFO L87 Difference]: Start difference. First operand 3620 states and 9131 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:28,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:28,366 INFO L93 Difference]: Finished difference Result 4855 states and 11693 transitions. [2021-07-09 17:10:28,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:28,366 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:28,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:28,375 INFO L225 Difference]: With dead ends: 4855 [2021-07-09 17:10:28,376 INFO L226 Difference]: Without dead ends: 4847 [2021-07-09 17:10:28,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:28,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4847 states. [2021-07-09 17:10:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4847 to 3739. [2021-07-09 17:10:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 2.537720706260032) internal successors, (9486), 3738 states have internal predecessors, (9486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:28,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 9486 transitions. [2021-07-09 17:10:28,461 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 9486 transitions. Word has length 41 [2021-07-09 17:10:28,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:28,461 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 9486 transitions. [2021-07-09 17:10:28,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:28,461 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 9486 transitions. [2021-07-09 17:10:28,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:28,465 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:28,466 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:28,681 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:28,682 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:28,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:28,682 INFO L82 PathProgramCache]: Analyzing trace with hash 584855009, now seen corresponding path program 22 times [2021-07-09 17:10:28,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:28,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978430774] [2021-07-09 17:10:28,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:28,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:28,746 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:28,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:28,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978430774] [2021-07-09 17:10:28,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978430774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:28,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131223118] [2021-07-09 17:10:28,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:28,781 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:28,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:28,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:28,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:28,850 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 46 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:28,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131223118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:28,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:28,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-09 17:10:28,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774890456] [2021-07-09 17:10:28,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:28,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:28,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:28,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:28,851 INFO L87 Difference]: Start difference. First operand 3739 states and 9486 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:29,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:29,006 INFO L93 Difference]: Finished difference Result 5507 states and 13181 transitions. [2021-07-09 17:10:29,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:29,006 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:29,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:29,014 INFO L225 Difference]: With dead ends: 5507 [2021-07-09 17:10:29,014 INFO L226 Difference]: Without dead ends: 5507 [2021-07-09 17:10:29,014 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 71.9ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:29,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5507 states. [2021-07-09 17:10:29,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5507 to 3748. [2021-07-09 17:10:29,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3748 states, 3747 states have (on average 2.536962903656258) internal successors, (9506), 3747 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3748 states to 3748 states and 9506 transitions. [2021-07-09 17:10:29,078 INFO L78 Accepts]: Start accepts. Automaton has 3748 states and 9506 transitions. Word has length 41 [2021-07-09 17:10:29,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:29,078 INFO L482 AbstractCegarLoop]: Abstraction has 3748 states and 9506 transitions. [2021-07-09 17:10:29,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:29,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3748 states and 9506 transitions. [2021-07-09 17:10:29,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:29,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:29,083 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:29,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-07-09 17:10:29,300 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:29,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:29,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1052717447, now seen corresponding path program 23 times [2021-07-09 17:10:29,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:29,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248445004] [2021-07-09 17:10:29,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:29,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 43 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:29,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:29,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248445004] [2021-07-09 17:10:29,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248445004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:29,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477937283] [2021-07-09 17:10:29,356 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:29,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:10:29,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:29,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:29,491 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:29,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477937283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:29,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:29,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 15 [2021-07-09 17:10:29,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341242580] [2021-07-09 17:10:29,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:10:29,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:29,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:10:29,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:29,492 INFO L87 Difference]: Start difference. First operand 3748 states and 9506 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:29,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:29,735 INFO L93 Difference]: Finished difference Result 5032 states and 12054 transitions. [2021-07-09 17:10:29,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:29,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:29,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:29,743 INFO L225 Difference]: With dead ends: 5032 [2021-07-09 17:10:29,743 INFO L226 Difference]: Without dead ends: 5032 [2021-07-09 17:10:29,743 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 153.0ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:29,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5032 states. [2021-07-09 17:10:29,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5032 to 3584. [2021-07-09 17:10:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.521629919062238) internal successors, (9035), 3583 states have internal predecessors, (9035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9035 transitions. [2021-07-09 17:10:29,813 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9035 transitions. Word has length 41 [2021-07-09 17:10:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:29,813 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9035 transitions. [2021-07-09 17:10:29,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9035 transitions. [2021-07-09 17:10:29,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:29,817 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:29,817 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:30,033 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-07-09 17:10:30,033 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:30,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:30,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1317611251, now seen corresponding path program 52 times [2021-07-09 17:10:30,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:30,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499970118] [2021-07-09 17:10:30,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:30,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:30,090 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:30,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:30,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499970118] [2021-07-09 17:10:30,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499970118] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:30,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33752763] [2021-07-09 17:10:30,091 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:30,116 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:30,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:30,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:30,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:30,182 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 30 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:30,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33752763] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:30,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:30,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:10:30,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602041818] [2021-07-09 17:10:30,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:30,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:30,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:30,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:30,183 INFO L87 Difference]: Start difference. First operand 3584 states and 9035 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:30,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:30,350 INFO L93 Difference]: Finished difference Result 4100 states and 9963 transitions. [2021-07-09 17:10:30,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:30,350 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:30,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:30,356 INFO L225 Difference]: With dead ends: 4100 [2021-07-09 17:10:30,357 INFO L226 Difference]: Without dead ends: 4082 [2021-07-09 17:10:30,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:30,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-07-09 17:10:30,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3584. [2021-07-09 17:10:30,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 2.520234440413062) internal successors, (9030), 3583 states have internal predecessors, (9030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:30,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 9030 transitions. [2021-07-09 17:10:30,419 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 9030 transitions. Word has length 41 [2021-07-09 17:10:30,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:30,419 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 9030 transitions. [2021-07-09 17:10:30,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:30,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 9030 transitions. [2021-07-09 17:10:30,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:30,423 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:30,424 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:30,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-07-09 17:10:30,635 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:30,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:30,635 INFO L82 PathProgramCache]: Analyzing trace with hash 1869360074, now seen corresponding path program 24 times [2021-07-09 17:10:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:30,635 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936228469] [2021-07-09 17:10:30,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:30,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 6 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:30,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:30,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936228469] [2021-07-09 17:10:30,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936228469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:30,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34916746] [2021-07-09 17:10:30,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:30,739 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:10:30,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:30,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:30,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:30,803 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 58 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:30,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [34916746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:30,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:30,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:10:30,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346712385] [2021-07-09 17:10:30,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:30,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:30,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:30,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:30,804 INFO L87 Difference]: Start difference. First operand 3584 states and 9030 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:31,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:31,057 INFO L93 Difference]: Finished difference Result 4419 states and 10697 transitions. [2021-07-09 17:10:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:31,057 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:31,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:31,064 INFO L225 Difference]: With dead ends: 4419 [2021-07-09 17:10:31,064 INFO L226 Difference]: Without dead ends: 4397 [2021-07-09 17:10:31,064 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:31,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4397 states. [2021-07-09 17:10:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4397 to 3612. [2021-07-09 17:10:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3612 states, 3611 states have (on average 2.5206314040432014) internal successors, (9102), 3611 states have internal predecessors, (9102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:31,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3612 states to 3612 states and 9102 transitions. [2021-07-09 17:10:31,128 INFO L78 Accepts]: Start accepts. Automaton has 3612 states and 9102 transitions. Word has length 41 [2021-07-09 17:10:31,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:31,128 INFO L482 AbstractCegarLoop]: Abstraction has 3612 states and 9102 transitions. [2021-07-09 17:10:31,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:31,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3612 states and 9102 transitions. [2021-07-09 17:10:31,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:31,132 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:31,132 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:31,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-07-09 17:10:31,334 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:31,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:31,334 INFO L82 PathProgramCache]: Analyzing trace with hash -925274230, now seen corresponding path program 53 times [2021-07-09 17:10:31,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:31,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715184795] [2021-07-09 17:10:31,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:31,396 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:31,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:31,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715184795] [2021-07-09 17:10:31,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715184795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:31,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854302694] [2021-07-09 17:10:31,396 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:31,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:10:31,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:31,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:31,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:31,513 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:31,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854302694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:31,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:31,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:10:31,513 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745193849] [2021-07-09 17:10:31,513 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:31,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:31,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:31,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:31,514 INFO L87 Difference]: Start difference. First operand 3612 states and 9102 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:31,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:31,830 INFO L93 Difference]: Finished difference Result 4113 states and 10023 transitions. [2021-07-09 17:10:31,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:31,830 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:31,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:31,835 INFO L225 Difference]: With dead ends: 4113 [2021-07-09 17:10:31,835 INFO L226 Difference]: Without dead ends: 4057 [2021-07-09 17:10:31,836 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 87.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:31,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4057 states. [2021-07-09 17:10:31,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4057 to 3639. [2021-07-09 17:10:31,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 2.51456844420011) internal successors, (9148), 3638 states have internal predecessors, (9148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 9148 transitions. [2021-07-09 17:10:31,884 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 9148 transitions. Word has length 41 [2021-07-09 17:10:31,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:31,884 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 9148 transitions. [2021-07-09 17:10:31,884 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:31,885 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 9148 transitions. [2021-07-09 17:10:31,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:31,887 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:31,888 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:32,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:32,104 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:32,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:32,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1538810410, now seen corresponding path program 54 times [2021-07-09 17:10:32,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:32,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124398517] [2021-07-09 17:10:32,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:32,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:32,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:32,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124398517] [2021-07-09 17:10:32,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124398517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:32,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930966697] [2021-07-09 17:10:32,166 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:32,195 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:10:32,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:32,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:32,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:32,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930966697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:32,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:32,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:10:32,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900186179] [2021-07-09 17:10:32,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:32,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:32,266 INFO L87 Difference]: Start difference. First operand 3639 states and 9148 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:32,543 INFO L93 Difference]: Finished difference Result 4375 states and 10599 transitions. [2021-07-09 17:10:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:32,543 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:32,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:32,550 INFO L225 Difference]: With dead ends: 4375 [2021-07-09 17:10:32,550 INFO L226 Difference]: Without dead ends: 4363 [2021-07-09 17:10:32,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:32,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-07-09 17:10:32,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3649. [2021-07-09 17:10:32,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3649 states, 3648 states have (on average 2.513157894736842) internal successors, (9168), 3648 states have internal predecessors, (9168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:32,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3649 states to 3649 states and 9168 transitions. [2021-07-09 17:10:32,615 INFO L78 Accepts]: Start accepts. Automaton has 3649 states and 9168 transitions. Word has length 41 [2021-07-09 17:10:32,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:32,616 INFO L482 AbstractCegarLoop]: Abstraction has 3649 states and 9168 transitions. [2021-07-09 17:10:32,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:32,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3649 states and 9168 transitions. [2021-07-09 17:10:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:32,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:32,620 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:32,829 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:32,829 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1696109897, now seen corresponding path program 25 times [2021-07-09 17:10:32,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:32,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022475651] [2021-07-09 17:10:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:32,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:32,876 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 40 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:32,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:32,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022475651] [2021-07-09 17:10:32,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022475651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:32,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326428060] [2021-07-09 17:10:32,876 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:32,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:32,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 42 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:33,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326428060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:33,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:33,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-09 17:10:33,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032531682] [2021-07-09 17:10:33,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:33,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:33,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:33,020 INFO L87 Difference]: Start difference. First operand 3649 states and 9168 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:33,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:33,160 INFO L93 Difference]: Finished difference Result 4653 states and 11200 transitions. [2021-07-09 17:10:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:33,161 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:33,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:33,168 INFO L225 Difference]: With dead ends: 4653 [2021-07-09 17:10:33,168 INFO L226 Difference]: Without dead ends: 4643 [2021-07-09 17:10:33,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 65.4ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:33,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4643 states. [2021-07-09 17:10:33,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4643 to 3759. [2021-07-09 17:10:33,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 2.5172964342735495) internal successors, (9460), 3758 states have internal predecessors, (9460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 9460 transitions. [2021-07-09 17:10:33,230 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 9460 transitions. Word has length 41 [2021-07-09 17:10:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:33,230 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 9460 transitions. [2021-07-09 17:10:33,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:33,230 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 9460 transitions. [2021-07-09 17:10:33,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:33,235 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:33,235 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:33,451 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,130 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:33,452 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:33,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1107799383, now seen corresponding path program 55 times [2021-07-09 17:10:33,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:33,452 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283269667] [2021-07-09 17:10:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:33,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:33,494 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:33,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:33,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283269667] [2021-07-09 17:10:33,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283269667] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:33,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427797254] [2021-07-09 17:10:33,495 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:33,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:33,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:33,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:33,575 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 43 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:33,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427797254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:33,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:33,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:10:33,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481245677] [2021-07-09 17:10:33,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:33,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:33,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:33,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:33,576 INFO L87 Difference]: Start difference. First operand 3759 states and 9460 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:33,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:33,706 INFO L93 Difference]: Finished difference Result 4425 states and 10642 transitions. [2021-07-09 17:10:33,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:33,707 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:33,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:33,714 INFO L225 Difference]: With dead ends: 4425 [2021-07-09 17:10:33,714 INFO L226 Difference]: Without dead ends: 4407 [2021-07-09 17:10:33,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 54.7ms TimeCoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:33,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4407 states. [2021-07-09 17:10:33,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4407 to 3746. [2021-07-09 17:10:33,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3746 states, 3745 states have (on average 2.5124165554072095) internal successors, (9409), 3745 states have internal predecessors, (9409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:33,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3746 states to 3746 states and 9409 transitions. [2021-07-09 17:10:33,770 INFO L78 Accepts]: Start accepts. Automaton has 3746 states and 9409 transitions. Word has length 41 [2021-07-09 17:10:33,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:33,770 INFO L482 AbstractCegarLoop]: Abstraction has 3746 states and 9409 transitions. [2021-07-09 17:10:33,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:33,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3746 states and 9409 transitions. [2021-07-09 17:10:33,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:33,774 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:33,774 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:33,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable245,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:33,990 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:33,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:33,990 INFO L82 PathProgramCache]: Analyzing trace with hash 603106924, now seen corresponding path program 56 times [2021-07-09 17:10:33,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:33,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273042366] [2021-07-09 17:10:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:34,067 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:34,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:34,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273042366] [2021-07-09 17:10:34,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273042366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:34,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675805553] [2021-07-09 17:10:34,067 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:34,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:34,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:34,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:34,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:34,151 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:34,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675805553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:34,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:34,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:10:34,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185869072] [2021-07-09 17:10:34,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:34,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:34,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:34,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:34,152 INFO L87 Difference]: Start difference. First operand 3746 states and 9409 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:34,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:34,479 INFO L93 Difference]: Finished difference Result 5163 states and 12313 transitions. [2021-07-09 17:10:34,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:10:34,480 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:34,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:34,488 INFO L225 Difference]: With dead ends: 5163 [2021-07-09 17:10:34,488 INFO L226 Difference]: Without dead ends: 5121 [2021-07-09 17:10:34,488 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 132.6ms TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:34,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5121 states. [2021-07-09 17:10:34,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5121 to 3767. [2021-07-09 17:10:34,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3767 states, 3766 states have (on average 2.5132766861391396) internal successors, (9465), 3766 states have internal predecessors, (9465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:34,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3767 states to 3767 states and 9465 transitions. [2021-07-09 17:10:34,562 INFO L78 Accepts]: Start accepts. Automaton has 3767 states and 9465 transitions. Word has length 41 [2021-07-09 17:10:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:34,562 INFO L482 AbstractCegarLoop]: Abstraction has 3767 states and 9465 transitions. [2021-07-09 17:10:34,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:34,562 INFO L276 IsEmpty]: Start isEmpty. Operand 3767 states and 9465 transitions. [2021-07-09 17:10:34,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:34,567 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:34,567 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:34,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-07-09 17:10:34,784 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:34,784 INFO L82 PathProgramCache]: Analyzing trace with hash 2135666033, now seen corresponding path program 57 times [2021-07-09 17:10:34,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:34,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092042909] [2021-07-09 17:10:34,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:34,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:34,834 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:34,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:34,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092042909] [2021-07-09 17:10:34,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092042909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:34,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123779453] [2021-07-09 17:10:34,835 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:34,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:10:34,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:34,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:34,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:34,920 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 45 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:34,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123779453] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:34,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:34,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:10:34,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668055287] [2021-07-09 17:10:34,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:34,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:34,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:34,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:34,921 INFO L87 Difference]: Start difference. First operand 3767 states and 9465 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:35,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:35,046 INFO L93 Difference]: Finished difference Result 4453 states and 10682 transitions. [2021-07-09 17:10:35,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:35,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:35,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:35,053 INFO L225 Difference]: With dead ends: 4453 [2021-07-09 17:10:35,053 INFO L226 Difference]: Without dead ends: 4429 [2021-07-09 17:10:35,053 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 62.8ms TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4429 states. [2021-07-09 17:10:35,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4429 to 3631. [2021-07-09 17:10:35,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3631 states, 3630 states have (on average 2.4991735537190083) internal successors, (9072), 3630 states have internal predecessors, (9072), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:35,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3631 states to 3631 states and 9072 transitions. [2021-07-09 17:10:35,106 INFO L78 Accepts]: Start accepts. Automaton has 3631 states and 9072 transitions. Word has length 41 [2021-07-09 17:10:35,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:35,106 INFO L482 AbstractCegarLoop]: Abstraction has 3631 states and 9072 transitions. [2021-07-09 17:10:35,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3631 states and 9072 transitions. [2021-07-09 17:10:35,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:35,110 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:35,110 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:35,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2021-07-09 17:10:35,327 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:35,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:35,327 INFO L82 PathProgramCache]: Analyzing trace with hash 757943458, now seen corresponding path program 58 times [2021-07-09 17:10:35,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:35,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813880285] [2021-07-09 17:10:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:35,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:35,417 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:35,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:35,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813880285] [2021-07-09 17:10:35,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813880285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:35,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54974449] [2021-07-09 17:10:35,418 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:35,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:35,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:35,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:35,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:35,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54974449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:35,528 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:35,528 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:10:35,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455549543] [2021-07-09 17:10:35,529 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:35,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:35,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:35,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:35,529 INFO L87 Difference]: Start difference. First operand 3631 states and 9072 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:35,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:35,888 INFO L93 Difference]: Finished difference Result 4939 states and 11659 transitions. [2021-07-09 17:10:35,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:35,888 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:35,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:35,896 INFO L225 Difference]: With dead ends: 4939 [2021-07-09 17:10:35,896 INFO L226 Difference]: Without dead ends: 4885 [2021-07-09 17:10:35,896 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 146.6ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:10:35,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4885 states. [2021-07-09 17:10:35,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4885 to 3618. [2021-07-09 17:10:35,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3618 states, 3617 states have (on average 2.493779375172795) internal successors, (9020), 3617 states have internal predecessors, (9020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:35,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3618 states to 3618 states and 9020 transitions. [2021-07-09 17:10:35,955 INFO L78 Accepts]: Start accepts. Automaton has 3618 states and 9020 transitions. Word has length 41 [2021-07-09 17:10:35,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:35,955 INFO L482 AbstractCegarLoop]: Abstraction has 3618 states and 9020 transitions. [2021-07-09 17:10:35,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3618 states and 9020 transitions. [2021-07-09 17:10:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:35,960 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:35,960 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:36,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:36,176 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:36,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:36,176 INFO L82 PathProgramCache]: Analyzing trace with hash -101998469, now seen corresponding path program 26 times [2021-07-09 17:10:36,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:36,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140696611] [2021-07-09 17:10:36,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:36,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:36,223 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:36,223 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:36,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140696611] [2021-07-09 17:10:36,223 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140696611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:36,223 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098406024] [2021-07-09 17:10:36,223 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:36,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:36,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:36,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:36,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:36,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098406024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:36,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:36,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 9 [2021-07-09 17:10:36,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777172097] [2021-07-09 17:10:36,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:36,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:36,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:36,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:36,312 INFO L87 Difference]: Start difference. First operand 3618 states and 9020 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:36,489 INFO L93 Difference]: Finished difference Result 5763 states and 13661 transitions. [2021-07-09 17:10:36,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:36,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:36,497 INFO L225 Difference]: With dead ends: 5763 [2021-07-09 17:10:36,497 INFO L226 Difference]: Without dead ends: 5763 [2021-07-09 17:10:36,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 80.2ms TimeCoverageRelationStatistics Valid=66, Invalid=90, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:36,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5763 states. [2021-07-09 17:10:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5763 to 3703. [2021-07-09 17:10:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3703 states, 3702 states have (on average 2.5062128579146408) internal successors, (9278), 3702 states have internal predecessors, (9278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3703 states to 3703 states and 9278 transitions. [2021-07-09 17:10:36,549 INFO L78 Accepts]: Start accepts. Automaton has 3703 states and 9278 transitions. Word has length 41 [2021-07-09 17:10:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:36,549 INFO L482 AbstractCegarLoop]: Abstraction has 3703 states and 9278 transitions. [2021-07-09 17:10:36,549 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3703 states and 9278 transitions. [2021-07-09 17:10:36,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:36,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:36,552 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:36,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:36,768 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:36,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:36,768 INFO L82 PathProgramCache]: Analyzing trace with hash -1739570925, now seen corresponding path program 27 times [2021-07-09 17:10:36,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:36,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665889722] [2021-07-09 17:10:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:36,831 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 51 proven. 15 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:36,831 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:36,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665889722] [2021-07-09 17:10:36,831 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665889722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:36,831 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269136878] [2021-07-09 17:10:36,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:36,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:10:36,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:36,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:36,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:36,924 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 52 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:36,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269136878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:36,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:36,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-09 17:10:36,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991400313] [2021-07-09 17:10:36,924 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:36,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:36,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:36,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:36,925 INFO L87 Difference]: Start difference. First operand 3703 states and 9278 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:37,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:37,156 INFO L93 Difference]: Finished difference Result 5686 states and 13483 transitions. [2021-07-09 17:10:37,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:37,156 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:37,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:37,167 INFO L225 Difference]: With dead ends: 5686 [2021-07-09 17:10:37,167 INFO L226 Difference]: Without dead ends: 5686 [2021-07-09 17:10:37,167 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 92.7ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:10:37,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5686 states. [2021-07-09 17:10:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5686 to 3719. [2021-07-09 17:10:37,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3719 states, 3718 states have (on average 2.5080688542227003) internal successors, (9325), 3718 states have internal predecessors, (9325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:37,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3719 states to 3719 states and 9325 transitions. [2021-07-09 17:10:37,234 INFO L78 Accepts]: Start accepts. Automaton has 3719 states and 9325 transitions. Word has length 41 [2021-07-09 17:10:37,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:37,234 INFO L482 AbstractCegarLoop]: Abstraction has 3719 states and 9325 transitions. [2021-07-09 17:10:37,234 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:37,234 INFO L276 IsEmpty]: Start isEmpty. Operand 3719 states and 9325 transitions. [2021-07-09 17:10:37,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:37,238 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:37,238 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:37,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-07-09 17:10:37,455 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:37,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:37,455 INFO L82 PathProgramCache]: Analyzing trace with hash 865401207, now seen corresponding path program 28 times [2021-07-09 17:10:37,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:37,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287533245] [2021-07-09 17:10:37,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:37,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 44 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:37,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:37,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287533245] [2021-07-09 17:10:37,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287533245] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:37,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89165550] [2021-07-09 17:10:37,516 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:37,541 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:37,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:37,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:37,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 45 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:37,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89165550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:37,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:37,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:10:37,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204029347] [2021-07-09 17:10:37,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:10:37,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:37,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:10:37,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:37,605 INFO L87 Difference]: Start difference. First operand 3719 states and 9325 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:37,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:37,843 INFO L93 Difference]: Finished difference Result 4882 states and 11625 transitions. [2021-07-09 17:10:37,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:37,844 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:37,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:37,850 INFO L225 Difference]: With dead ends: 4882 [2021-07-09 17:10:37,850 INFO L226 Difference]: Without dead ends: 4882 [2021-07-09 17:10:37,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 108.4ms TimeCoverageRelationStatistics Valid=103, Invalid=169, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4882 states. [2021-07-09 17:10:37,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4882 to 3551. [2021-07-09 17:10:37,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507887323943662) internal successors, (8903), 3550 states have internal predecessors, (8903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:37,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8903 transitions. [2021-07-09 17:10:37,899 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8903 transitions. Word has length 41 [2021-07-09 17:10:37,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:37,900 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8903 transitions. [2021-07-09 17:10:37,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:37,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8903 transitions. [2021-07-09 17:10:37,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:37,903 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:37,903 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:38,116 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 137 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-07-09 17:10:38,117 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:38,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:38,117 INFO L82 PathProgramCache]: Analyzing trace with hash 1144546135, now seen corresponding path program 59 times [2021-07-09 17:10:38,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:38,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923384595] [2021-07-09 17:10:38,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:38,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:38,186 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:38,186 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923384595] [2021-07-09 17:10:38,186 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [923384595] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:38,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70713876] [2021-07-09 17:10:38,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:38,212 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-07-09 17:10:38,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:38,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:38,213 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:38,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70713876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:38,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:38,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 13 [2021-07-09 17:10:38,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286876669] [2021-07-09 17:10:38,308 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:10:38,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:38,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:10:38,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:38,308 INFO L87 Difference]: Start difference. First operand 3551 states and 8903 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:38,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:38,509 INFO L93 Difference]: Finished difference Result 4193 states and 10086 transitions. [2021-07-09 17:10:38,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:38,510 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:38,515 INFO L225 Difference]: With dead ends: 4193 [2021-07-09 17:10:38,515 INFO L226 Difference]: Without dead ends: 4166 [2021-07-09 17:10:38,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 103.2ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:38,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-07-09 17:10:38,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3551. [2021-07-09 17:10:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.507042253521127) internal successors, (8900), 3550 states have internal predecessors, (8900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:38,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8900 transitions. [2021-07-09 17:10:38,560 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8900 transitions. Word has length 41 [2021-07-09 17:10:38,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:38,560 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8900 transitions. [2021-07-09 17:10:38,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:38,561 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8900 transitions. [2021-07-09 17:10:38,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:38,564 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:38,564 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:38,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-07-09 17:10:38,777 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:38,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:38,777 INFO L82 PathProgramCache]: Analyzing trace with hash -245347661, now seen corresponding path program 60 times [2021-07-09 17:10:38,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:38,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620232157] [2021-07-09 17:10:38,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:38,822 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:38,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:38,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620232157] [2021-07-09 17:10:38,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620232157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:38,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767033918] [2021-07-09 17:10:38,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:38,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:10:38,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:38,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:38,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:38,906 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 39 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:38,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767033918] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:38,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:38,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:10:38,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594697937] [2021-07-09 17:10:38,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:38,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:38,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:38,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:38,907 INFO L87 Difference]: Start difference. First operand 3551 states and 8900 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:39,035 INFO L93 Difference]: Finished difference Result 4381 states and 10397 transitions. [2021-07-09 17:10:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:39,035 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:39,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:39,042 INFO L225 Difference]: With dead ends: 4381 [2021-07-09 17:10:39,042 INFO L226 Difference]: Without dead ends: 4363 [2021-07-09 17:10:39,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.2ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:39,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-07-09 17:10:39,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3551. [2021-07-09 17:10:39,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3551 states, 3550 states have (on average 2.5019718309859154) internal successors, (8882), 3550 states have internal predecessors, (8882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3551 states to 3551 states and 8882 transitions. [2021-07-09 17:10:39,099 INFO L78 Accepts]: Start accepts. Automaton has 3551 states and 8882 transitions. Word has length 41 [2021-07-09 17:10:39,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:39,099 INFO L482 AbstractCegarLoop]: Abstraction has 3551 states and 8882 transitions. [2021-07-09 17:10:39,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) internal successors, (38), 8 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:39,099 INFO L276 IsEmpty]: Start isEmpty. Operand 3551 states and 8882 transitions. [2021-07-09 17:10:39,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:39,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:39,103 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:39,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:39,304 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:39,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:39,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1693347674, now seen corresponding path program 61 times [2021-07-09 17:10:39,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:39,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992688509] [2021-07-09 17:10:39,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:39,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 49 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:39,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:39,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992688509] [2021-07-09 17:10:39,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992688509] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:39,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667196524] [2021-07-09 17:10:39,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:39,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:39,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:39,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:39,482 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 54 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:39,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667196524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:39,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:39,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:10:39,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721309631] [2021-07-09 17:10:39,483 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:39,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:39,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:39,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:39,483 INFO L87 Difference]: Start difference. First operand 3551 states and 8882 transitions. Second operand has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:39,861 INFO L93 Difference]: Finished difference Result 4355 states and 10366 transitions. [2021-07-09 17:10:39,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:39,861 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:39,868 INFO L225 Difference]: With dead ends: 4355 [2021-07-09 17:10:39,868 INFO L226 Difference]: Without dead ends: 4156 [2021-07-09 17:10:39,868 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 106.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:39,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4156 states. [2021-07-09 17:10:39,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4156 to 3529. [2021-07-09 17:10:39,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3529 states, 3528 states have (on average 2.484126984126984) internal successors, (8764), 3528 states have internal predecessors, (8764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:39,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3529 states to 3529 states and 8764 transitions. [2021-07-09 17:10:39,920 INFO L78 Accepts]: Start accepts. Automaton has 3529 states and 8764 transitions. Word has length 41 [2021-07-09 17:10:39,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:39,920 INFO L482 AbstractCegarLoop]: Abstraction has 3529 states and 8764 transitions. [2021-07-09 17:10:39,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.0) internal successors, (45), 8 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:39,920 INFO L276 IsEmpty]: Start isEmpty. Operand 3529 states and 8764 transitions. [2021-07-09 17:10:39,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:39,924 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:39,924 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:40,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-07-09 17:10:40,141 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:40,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:40,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1988083442, now seen corresponding path program 62 times [2021-07-09 17:10:40,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:40,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682783826] [2021-07-09 17:10:40,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:40,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:40,206 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 50 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:40,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:40,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682783826] [2021-07-09 17:10:40,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682783826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:40,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [259319875] [2021-07-09 17:10:40,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:40,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:40,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:40,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:40,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:40,299 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 51 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:10:40,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [259319875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:40,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:40,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:10:40,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088833748] [2021-07-09 17:10:40,300 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:40,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:40,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:40,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:40,300 INFO L87 Difference]: Start difference. First operand 3529 states and 8764 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:40,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:40,563 INFO L93 Difference]: Finished difference Result 4389 states and 10491 transitions. [2021-07-09 17:10:40,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:40,564 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:40,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:40,571 INFO L225 Difference]: With dead ends: 4389 [2021-07-09 17:10:40,571 INFO L226 Difference]: Without dead ends: 4377 [2021-07-09 17:10:40,571 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 89.6ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4377 states. [2021-07-09 17:10:40,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4377 to 3601. [2021-07-09 17:10:40,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3601 states, 3600 states have (on average 2.4819444444444443) internal successors, (8935), 3600 states have internal predecessors, (8935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:40,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3601 states to 3601 states and 8935 transitions. [2021-07-09 17:10:40,628 INFO L78 Accepts]: Start accepts. Automaton has 3601 states and 8935 transitions. Word has length 41 [2021-07-09 17:10:40,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:40,628 INFO L482 AbstractCegarLoop]: Abstraction has 3601 states and 8935 transitions. [2021-07-09 17:10:40,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:40,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3601 states and 8935 transitions. [2021-07-09 17:10:40,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:40,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:40,632 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:40,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:40,849 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:40,849 INFO L82 PathProgramCache]: Analyzing trace with hash -164966520, now seen corresponding path program 63 times [2021-07-09 17:10:40,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:40,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044918786] [2021-07-09 17:10:40,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:40,906 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:40,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:40,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044918786] [2021-07-09 17:10:40,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044918786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:40,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045886181] [2021-07-09 17:10:40,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:40,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:10:40,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:40,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:40,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:40,991 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:40,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045886181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:40,991 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:40,992 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:10:40,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989172133] [2021-07-09 17:10:40,992 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:40,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:40,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:40,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:40,992 INFO L87 Difference]: Start difference. First operand 3601 states and 8935 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:41,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:41,365 INFO L93 Difference]: Finished difference Result 5587 states and 13170 transitions. [2021-07-09 17:10:41,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:10:41,365 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:41,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:41,374 INFO L225 Difference]: With dead ends: 5587 [2021-07-09 17:10:41,374 INFO L226 Difference]: Without dead ends: 5533 [2021-07-09 17:10:41,375 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 141.9ms TimeCoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:10:41,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5533 states. [2021-07-09 17:10:41,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5533 to 3793. [2021-07-09 17:10:41,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.4897151898734178) internal successors, (9441), 3792 states have internal predecessors, (9441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:41,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9441 transitions. [2021-07-09 17:10:41,449 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9441 transitions. Word has length 41 [2021-07-09 17:10:41,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:41,449 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9441 transitions. [2021-07-09 17:10:41,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:41,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9441 transitions. [2021-07-09 17:10:41,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:41,453 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:41,453 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:41,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-07-09 17:10:41,669 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:41,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:41,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1367592589, now seen corresponding path program 64 times [2021-07-09 17:10:41,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:41,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096709913] [2021-07-09 17:10:41,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:41,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:41,720 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:41,720 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:41,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096709913] [2021-07-09 17:10:41,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096709913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:41,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966021631] [2021-07-09 17:10:41,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:41,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:41,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:41,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:41,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:41,804 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 19 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:41,804 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966021631] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:41,804 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:41,804 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:10:41,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128651269] [2021-07-09 17:10:41,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:41,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:41,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:41,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:41,805 INFO L87 Difference]: Start difference. First operand 3793 states and 9441 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:41,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:41,952 INFO L93 Difference]: Finished difference Result 4607 states and 10909 transitions. [2021-07-09 17:10:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:41,953 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:41,960 INFO L225 Difference]: With dead ends: 4607 [2021-07-09 17:10:41,960 INFO L226 Difference]: Without dead ends: 4583 [2021-07-09 17:10:41,961 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 64.4ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:41,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4583 states. [2021-07-09 17:10:42,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4583 to 3793. [2021-07-09 17:10:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 2.485495780590717) internal successors, (9425), 3792 states have internal predecessors, (9425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:42,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 9425 transitions. [2021-07-09 17:10:42,020 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 9425 transitions. Word has length 41 [2021-07-09 17:10:42,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:42,020 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 9425 transitions. [2021-07-09 17:10:42,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:42,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 9425 transitions. [2021-07-09 17:10:42,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:42,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:42,024 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:42,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-07-09 17:10:42,241 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:42,241 INFO L82 PathProgramCache]: Analyzing trace with hash -10129986, now seen corresponding path program 65 times [2021-07-09 17:10:42,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:42,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563951002] [2021-07-09 17:10:42,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:42,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:42,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563951002] [2021-07-09 17:10:42,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563951002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:42,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082273582] [2021-07-09 17:10:42,320 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:42,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:10:42,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:42,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:42,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:42,420 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:42,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082273582] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:42,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:42,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:10:42,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308367205] [2021-07-09 17:10:42,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:42,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:42,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:42,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:42,421 INFO L87 Difference]: Start difference. First operand 3793 states and 9425 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:42,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:42,949 INFO L93 Difference]: Finished difference Result 7022 states and 16378 transitions. [2021-07-09 17:10:42,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:10:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:42,961 INFO L225 Difference]: With dead ends: 7022 [2021-07-09 17:10:42,962 INFO L226 Difference]: Without dead ends: 6908 [2021-07-09 17:10:42,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 264.0ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:10:42,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6908 states. [2021-07-09 17:10:43,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6908 to 3954. [2021-07-09 17:10:43,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3954 states, 3953 states have (on average 2.489501644320769) internal successors, (9841), 3953 states have internal predecessors, (9841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:43,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3954 states to 3954 states and 9841 transitions. [2021-07-09 17:10:43,042 INFO L78 Accepts]: Start accepts. Automaton has 3954 states and 9841 transitions. Word has length 41 [2021-07-09 17:10:43,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:43,043 INFO L482 AbstractCegarLoop]: Abstraction has 3954 states and 9841 transitions. [2021-07-09 17:10:43,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:43,043 INFO L276 IsEmpty]: Start isEmpty. Operand 3954 states and 9841 transitions. [2021-07-09 17:10:43,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:43,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:43,047 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:43,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:43,264 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:43,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:43,264 INFO L82 PathProgramCache]: Analyzing trace with hash 376472691, now seen corresponding path program 66 times [2021-07-09 17:10:43,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:43,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438280598] [2021-07-09 17:10:43,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:43,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:43,327 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:43,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:43,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438280598] [2021-07-09 17:10:43,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438280598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:43,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018097910] [2021-07-09 17:10:43,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:43,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:10:43,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:43,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:43,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 20 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:43,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018097910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:43,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:43,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:10:43,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528403332] [2021-07-09 17:10:43,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:43,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:43,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:43,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:43,413 INFO L87 Difference]: Start difference. First operand 3954 states and 9841 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:43,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:43,594 INFO L93 Difference]: Finished difference Result 4805 states and 11375 transitions. [2021-07-09 17:10:43,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:43,594 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:43,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:43,604 INFO L225 Difference]: With dead ends: 4805 [2021-07-09 17:10:43,605 INFO L226 Difference]: Without dead ends: 4772 [2021-07-09 17:10:43,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 84.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:10:43,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4772 states. [2021-07-09 17:10:43,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4772 to 3796. [2021-07-09 17:10:43,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 2.477470355731225) internal successors, (9402), 3795 states have internal predecessors, (9402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:43,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 9402 transitions. [2021-07-09 17:10:43,694 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 9402 transitions. Word has length 41 [2021-07-09 17:10:43,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:43,694 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 9402 transitions. [2021-07-09 17:10:43,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:43,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 9402 transitions. [2021-07-09 17:10:43,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:43,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:43,700 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:43,912 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable273 [2021-07-09 17:10:43,913 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:43,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:43,913 INFO L82 PathProgramCache]: Analyzing trace with hash -69821496, now seen corresponding path program 67 times [2021-07-09 17:10:43,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:43,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17363726] [2021-07-09 17:10:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:44,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:44,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17363726] [2021-07-09 17:10:44,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17363726] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:44,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227957510] [2021-07-09 17:10:44,005 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:44,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:44,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:44,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:44,090 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:44,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227957510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:44,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:44,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:10:44,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030589452] [2021-07-09 17:10:44,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:10:44,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:44,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:10:44,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:44,091 INFO L87 Difference]: Start difference. First operand 3796 states and 9402 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:44,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:44,481 INFO L93 Difference]: Finished difference Result 5143 states and 11987 transitions. [2021-07-09 17:10:44,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:44,481 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:44,489 INFO L225 Difference]: With dead ends: 5143 [2021-07-09 17:10:44,489 INFO L226 Difference]: Without dead ends: 4987 [2021-07-09 17:10:44,489 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 190.4ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4987 states. [2021-07-09 17:10:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4987 to 3332. [2021-07-09 17:10:44,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3332 states, 3331 states have (on average 2.4377063944761335) internal successors, (8120), 3331 states have internal predecessors, (8120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:44,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3332 states to 3332 states and 8120 transitions. [2021-07-09 17:10:44,549 INFO L78 Accepts]: Start accepts. Automaton has 3332 states and 8120 transitions. Word has length 41 [2021-07-09 17:10:44,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:44,550 INFO L482 AbstractCegarLoop]: Abstraction has 3332 states and 8120 transitions. [2021-07-09 17:10:44,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:44,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3332 states and 8120 transitions. [2021-07-09 17:10:44,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:44,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:44,554 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:44,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-07-09 17:10:44,769 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:44,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:44,769 INFO L82 PathProgramCache]: Analyzing trace with hash -307883013, now seen corresponding path program 29 times [2021-07-09 17:10:44,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:44,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447639396] [2021-07-09 17:10:44,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:44,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:44,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447639396] [2021-07-09 17:10:44,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447639396] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:44,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516253454] [2021-07-09 17:10:44,813 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:44,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:10:44,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:44,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:44,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:44,902 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 54 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:44,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516253454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:44,902 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:44,902 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-07-09 17:10:44,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073429433] [2021-07-09 17:10:44,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:44,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:44,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:44,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:44,903 INFO L87 Difference]: Start difference. First operand 3332 states and 8120 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:45,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:45,060 INFO L93 Difference]: Finished difference Result 4368 states and 10283 transitions. [2021-07-09 17:10:45,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:45,060 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:45,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:45,067 INFO L225 Difference]: With dead ends: 4368 [2021-07-09 17:10:45,067 INFO L226 Difference]: Without dead ends: 4354 [2021-07-09 17:10:45,067 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:45,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4354 states. [2021-07-09 17:10:45,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4354 to 3443. [2021-07-09 17:10:45,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3443 states, 3442 states have (on average 2.4468332364904124) internal successors, (8422), 3442 states have internal predecessors, (8422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:45,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3443 states to 3443 states and 8422 transitions. [2021-07-09 17:10:45,133 INFO L78 Accepts]: Start accepts. Automaton has 3443 states and 8422 transitions. Word has length 41 [2021-07-09 17:10:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:45,133 INFO L482 AbstractCegarLoop]: Abstraction has 3443 states and 8422 transitions. [2021-07-09 17:10:45,133 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:45,133 INFO L276 IsEmpty]: Start isEmpty. Operand 3443 states and 8422 transitions. [2021-07-09 17:10:45,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:45,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:45,137 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:45,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2021-07-09 17:10:45,353 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:45,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:45,353 INFO L82 PathProgramCache]: Analyzing trace with hash -929763423, now seen corresponding path program 30 times [2021-07-09 17:10:45,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:45,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359243921] [2021-07-09 17:10:45,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:45,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:45,401 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 53 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:45,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:45,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359243921] [2021-07-09 17:10:45,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [359243921] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:45,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626211553] [2021-07-09 17:10:45,402 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:45,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:10:45,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:45,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:10:45,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 56 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:45,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626211553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:45,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:45,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-09 17:10:45,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085757444] [2021-07-09 17:10:45,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:45,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:45,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:45,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:45,499 INFO L87 Difference]: Start difference. First operand 3443 states and 8422 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:45,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:45,719 INFO L93 Difference]: Finished difference Result 4338 states and 10163 transitions. [2021-07-09 17:10:45,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:45,720 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:45,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:45,726 INFO L225 Difference]: With dead ends: 4338 [2021-07-09 17:10:45,726 INFO L226 Difference]: Without dead ends: 4338 [2021-07-09 17:10:45,726 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 111.1ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:45,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-07-09 17:10:45,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3179. [2021-07-09 17:10:45,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3179 states, 3178 states have (on average 2.4389553178099432) internal successors, (7751), 3178 states have internal predecessors, (7751), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:45,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3179 states to 3179 states and 7751 transitions. [2021-07-09 17:10:45,776 INFO L78 Accepts]: Start accepts. Automaton has 3179 states and 7751 transitions. Word has length 41 [2021-07-09 17:10:45,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:45,776 INFO L482 AbstractCegarLoop]: Abstraction has 3179 states and 7751 transitions. [2021-07-09 17:10:45,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:45,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3179 states and 7751 transitions. [2021-07-09 17:10:45,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:45,780 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:45,780 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:45,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable281,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:45,996 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1823751373, now seen corresponding path program 68 times [2021-07-09 17:10:45,997 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:45,997 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618627215] [2021-07-09 17:10:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:45,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:46,065 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:46,065 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618627215] [2021-07-09 17:10:46,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618627215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:46,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991416645] [2021-07-09 17:10:46,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:46,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:46,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:46,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:46,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:46,150 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:46,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991416645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:46,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:46,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:10:46,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244519930] [2021-07-09 17:10:46,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:10:46,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:46,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:10:46,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:46,151 INFO L87 Difference]: Start difference. First operand 3179 states and 7751 transitions. Second operand has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:46,332 INFO L93 Difference]: Finished difference Result 3775 states and 8829 transitions. [2021-07-09 17:10:46,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:46,332 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:46,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:46,337 INFO L225 Difference]: With dead ends: 3775 [2021-07-09 17:10:46,337 INFO L226 Difference]: Without dead ends: 3739 [2021-07-09 17:10:46,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:46,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-07-09 17:10:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3188. [2021-07-09 17:10:46,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3188 states, 3187 states have (on average 2.4339504235958582) internal successors, (7757), 3187 states have internal predecessors, (7757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:46,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3188 states to 3188 states and 7757 transitions. [2021-07-09 17:10:46,387 INFO L78 Accepts]: Start accepts. Automaton has 3188 states and 7757 transitions. Word has length 41 [2021-07-09 17:10:46,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:46,387 INFO L482 AbstractCegarLoop]: Abstraction has 3188 states and 7757 transitions. [2021-07-09 17:10:46,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.3333333333333335) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:46,387 INFO L276 IsEmpty]: Start isEmpty. Operand 3188 states and 7757 transitions. [2021-07-09 17:10:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:46,390 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:46,391 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:46,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:46,608 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:46,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:46,608 INFO L82 PathProgramCache]: Analyzing trace with hash 370314101, now seen corresponding path program 69 times [2021-07-09 17:10:46,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:46,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138724306] [2021-07-09 17:10:46,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:46,682 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:46,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:46,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138724306] [2021-07-09 17:10:46,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138724306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:46,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710702671] [2021-07-09 17:10:46,682 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:46,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:10:46,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:46,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:46,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:46,772 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 33 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:46,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710702671] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:46,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:46,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:10:46,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701521495] [2021-07-09 17:10:46,773 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:10:46,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:46,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:10:46,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:46,773 INFO L87 Difference]: Start difference. First operand 3188 states and 7757 transitions. Second operand has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:47,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:47,023 INFO L93 Difference]: Finished difference Result 4138 states and 9762 transitions. [2021-07-09 17:10:47,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:47,023 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:47,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:47,030 INFO L225 Difference]: With dead ends: 4138 [2021-07-09 17:10:47,030 INFO L226 Difference]: Without dead ends: 4138 [2021-07-09 17:10:47,030 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:10:47,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-07-09 17:10:47,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3170. [2021-07-09 17:10:47,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3170 states, 3169 states have (on average 2.454717576522562) internal successors, (7779), 3169 states have internal predecessors, (7779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:47,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3170 states to 3170 states and 7779 transitions. [2021-07-09 17:10:47,077 INFO L78 Accepts]: Start accepts. Automaton has 3170 states and 7779 transitions. Word has length 41 [2021-07-09 17:10:47,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:47,077 INFO L482 AbstractCegarLoop]: Abstraction has 3170 states and 7779 transitions. [2021-07-09 17:10:47,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.25) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:47,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3170 states and 7779 transitions. [2021-07-09 17:10:47,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:47,119 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:47,119 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:47,332 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable290 [2021-07-09 17:10:47,333 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:47,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:47,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1062684898, now seen corresponding path program 31 times [2021-07-09 17:10:47,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:47,333 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528699993] [2021-07-09 17:10:47,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:47,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:47,418 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:47,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:47,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528699993] [2021-07-09 17:10:47,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528699993] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:47,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74736670] [2021-07-09 17:10:47,418 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:47,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:47,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:47,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:47,504 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:47,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74736670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:47,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:47,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:10:47,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403670946] [2021-07-09 17:10:47,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:10:47,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:47,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:10:47,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:47,505 INFO L87 Difference]: Start difference. First operand 3170 states and 7779 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:47,827 INFO L93 Difference]: Finished difference Result 4257 states and 9988 transitions. [2021-07-09 17:10:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:10:47,828 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:47,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:47,833 INFO L225 Difference]: With dead ends: 4257 [2021-07-09 17:10:47,833 INFO L226 Difference]: Without dead ends: 4227 [2021-07-09 17:10:47,833 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 182.1ms TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:47,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4227 states. [2021-07-09 17:10:47,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4227 to 3157. [2021-07-09 17:10:47,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.459442332065906) internal successors, (7762), 3156 states have internal predecessors, (7762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:47,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7762 transitions. [2021-07-09 17:10:47,870 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7762 transitions. Word has length 41 [2021-07-09 17:10:47,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:47,870 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7762 transitions. [2021-07-09 17:10:47,870 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:47,870 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7762 transitions. [2021-07-09 17:10:47,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:47,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:47,873 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:48,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:48,088 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:48,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:48,089 INFO L82 PathProgramCache]: Analyzing trace with hash 900632802, now seen corresponding path program 70 times [2021-07-09 17:10:48,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:48,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040452030] [2021-07-09 17:10:48,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:48,171 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:48,171 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040452030] [2021-07-09 17:10:48,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040452030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:48,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620734569] [2021-07-09 17:10:48,172 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:48,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:48,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:48,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:48,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:48,346 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:48,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620734569] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:48,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:48,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 14 [2021-07-09 17:10:48,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037236588] [2021-07-09 17:10:48,347 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:10:48,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:48,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:10:48,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:10:48,347 INFO L87 Difference]: Start difference. First operand 3157 states and 7762 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:48,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:48,687 INFO L93 Difference]: Finished difference Result 3218 states and 7858 transitions. [2021-07-09 17:10:48,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:48,687 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:48,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:48,692 INFO L225 Difference]: With dead ends: 3218 [2021-07-09 17:10:48,692 INFO L226 Difference]: Without dead ends: 3174 [2021-07-09 17:10:48,693 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 125.3ms TimeCoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:10:48,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3174 states. [2021-07-09 17:10:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3174 to 3157. [2021-07-09 17:10:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3157 states, 3156 states have (on average 2.45659062103929) internal successors, (7753), 3156 states have internal predecessors, (7753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:48,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3157 states to 3157 states and 7753 transitions. [2021-07-09 17:10:48,734 INFO L78 Accepts]: Start accepts. Automaton has 3157 states and 7753 transitions. Word has length 41 [2021-07-09 17:10:48,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:48,734 INFO L482 AbstractCegarLoop]: Abstraction has 3157 states and 7753 transitions. [2021-07-09 17:10:48,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:48,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3157 states and 7753 transitions. [2021-07-09 17:10:48,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:48,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:48,737 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:48,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable292 [2021-07-09 17:10:48,953 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:48,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:48,953 INFO L82 PathProgramCache]: Analyzing trace with hash -514678441, now seen corresponding path program 71 times [2021-07-09 17:10:48,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:48,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100783463] [2021-07-09 17:10:48,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:48,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:49,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:49,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100783463] [2021-07-09 17:10:49,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100783463] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:49,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768292662] [2021-07-09 17:10:49,015 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:49,042 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:10:49,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:49,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:49,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:49,115 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 33 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:49,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768292662] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:49,115 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:49,115 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 12 [2021-07-09 17:10:49,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877507627] [2021-07-09 17:10:49,116 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:10:49,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:49,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:10:49,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:49,116 INFO L87 Difference]: Start difference. First operand 3157 states and 7753 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:49,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:49,332 INFO L93 Difference]: Finished difference Result 4264 states and 10096 transitions. [2021-07-09 17:10:49,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:49,333 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:49,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:49,339 INFO L225 Difference]: With dead ends: 4264 [2021-07-09 17:10:49,339 INFO L226 Difference]: Without dead ends: 4264 [2021-07-09 17:10:49,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:10:49,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-07-09 17:10:49,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3336. [2021-07-09 17:10:49,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 2.489055472263868) internal successors, (8301), 3335 states have internal predecessors, (8301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:49,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 8301 transitions. [2021-07-09 17:10:49,390 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 8301 transitions. Word has length 41 [2021-07-09 17:10:49,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:49,390 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 8301 transitions. [2021-07-09 17:10:49,390 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:49,390 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 8301 transitions. [2021-07-09 17:10:49,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:49,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:49,393 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:49,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:49,601 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:49,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:49,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1038909258, now seen corresponding path program 32 times [2021-07-09 17:10:49,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:49,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074789178] [2021-07-09 17:10:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:49,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:49,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074789178] [2021-07-09 17:10:49,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074789178] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:49,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523244331] [2021-07-09 17:10:49,669 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:49,693 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:49,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:49,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:49,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:49,746 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:49,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523244331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:49,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:49,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:10:49,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191064893] [2021-07-09 17:10:49,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:49,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:49,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:49,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:49,746 INFO L87 Difference]: Start difference. First operand 3336 states and 8301 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:50,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:50,012 INFO L93 Difference]: Finished difference Result 4243 states and 10191 transitions. [2021-07-09 17:10:50,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:50,013 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:50,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:50,018 INFO L225 Difference]: With dead ends: 4243 [2021-07-09 17:10:50,018 INFO L226 Difference]: Without dead ends: 4243 [2021-07-09 17:10:50,018 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 128.5ms TimeCoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:10:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-07-09 17:10:50,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3327. [2021-07-09 17:10:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.495189416716777) internal successors, (8299), 3326 states have internal predecessors, (8299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8299 transitions. [2021-07-09 17:10:50,061 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8299 transitions. Word has length 41 [2021-07-09 17:10:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:50,061 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8299 transitions. [2021-07-09 17:10:50,061 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8299 transitions. [2021-07-09 17:10:50,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:50,063 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:50,064 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:50,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:50,277 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:50,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:50,278 INFO L82 PathProgramCache]: Analyzing trace with hash 862018314, now seen corresponding path program 72 times [2021-07-09 17:10:50,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:50,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389460277] [2021-07-09 17:10:50,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:50,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:50,369 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:50,370 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:50,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389460277] [2021-07-09 17:10:50,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389460277] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:50,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850292816] [2021-07-09 17:10:50,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:50,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:10:50,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:50,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:50,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:50,511 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:50,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850292816] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:50,511 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:50,511 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-07-09 17:10:50,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75071894] [2021-07-09 17:10:50,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:10:50,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:50,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:10:50,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:50,512 INFO L87 Difference]: Start difference. First operand 3327 states and 8299 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:50,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:50,820 INFO L93 Difference]: Finished difference Result 3397 states and 8404 transitions. [2021-07-09 17:10:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:10:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:50,824 INFO L225 Difference]: With dead ends: 3397 [2021-07-09 17:10:50,824 INFO L226 Difference]: Without dead ends: 3365 [2021-07-09 17:10:50,824 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:50,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3365 states. [2021-07-09 17:10:50,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3365 to 3327. [2021-07-09 17:10:50,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.493385447985568) internal successors, (8293), 3326 states have internal predecessors, (8293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 8293 transitions. [2021-07-09 17:10:50,857 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 8293 transitions. Word has length 41 [2021-07-09 17:10:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:50,857 INFO L482 AbstractCegarLoop]: Abstraction has 3327 states and 8293 transitions. [2021-07-09 17:10:50,857 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 8293 transitions. [2021-07-09 17:10:50,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:50,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:50,859 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:51,075 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:51,075 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:51,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:51,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1554389111, now seen corresponding path program 33 times [2021-07-09 17:10:51,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:51,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854767161] [2021-07-09 17:10:51,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:51,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:51,136 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 28 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:51,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:51,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854767161] [2021-07-09 17:10:51,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854767161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:51,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364928894] [2021-07-09 17:10:51,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:51,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:10:51,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:51,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:51,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:51,231 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:51,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1364928894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:51,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:51,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:10:51,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008808514] [2021-07-09 17:10:51,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:10:51,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:51,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:10:51,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:51,232 INFO L87 Difference]: Start difference. First operand 3327 states and 8293 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:51,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:51,387 INFO L93 Difference]: Finished difference Result 3937 states and 9522 transitions. [2021-07-09 17:10:51,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:51,387 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:51,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:51,393 INFO L225 Difference]: With dead ends: 3937 [2021-07-09 17:10:51,393 INFO L226 Difference]: Without dead ends: 3909 [2021-07-09 17:10:51,393 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 79.2ms TimeCoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:10:51,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-07-09 17:10:51,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3225. [2021-07-09 17:10:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3225 states, 3224 states have (on average 2.507754342431762) internal successors, (8085), 3224 states have internal predecessors, (8085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3225 states to 3225 states and 8085 transitions. [2021-07-09 17:10:51,438 INFO L78 Accepts]: Start accepts. Automaton has 3225 states and 8085 transitions. Word has length 41 [2021-07-09 17:10:51,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:51,438 INFO L482 AbstractCegarLoop]: Abstraction has 3225 states and 8085 transitions. [2021-07-09 17:10:51,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:51,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3225 states and 8085 transitions. [2021-07-09 17:10:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:51,441 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:51,441 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:51,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:51,657 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash -692902219, now seen corresponding path program 73 times [2021-07-09 17:10:51,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:51,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408664995] [2021-07-09 17:10:51,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:51,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:51,710 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:51,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408664995] [2021-07-09 17:10:51,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408664995] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:51,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [416500397] [2021-07-09 17:10:51,710 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 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:51,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:51,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:51,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:51,805 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 29 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:51,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [416500397] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:51,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:51,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:10:51,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032852430] [2021-07-09 17:10:51,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:51,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:51,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:51,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:51,806 INFO L87 Difference]: Start difference. First operand 3225 states and 8085 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:51,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:51,975 INFO L93 Difference]: Finished difference Result 4305 states and 10371 transitions. [2021-07-09 17:10:51,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:10:51,976 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:51,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:51,982 INFO L225 Difference]: With dead ends: 4305 [2021-07-09 17:10:51,982 INFO L226 Difference]: Without dead ends: 4305 [2021-07-09 17:10:51,983 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 72.1ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:51,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-07-09 17:10:52,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3427. [2021-07-09 17:10:52,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3427 states, 3426 states have (on average 2.538237011091652) internal successors, (8696), 3426 states have internal predecessors, (8696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:52,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3427 states to 3427 states and 8696 transitions. [2021-07-09 17:10:52,038 INFO L78 Accepts]: Start accepts. Automaton has 3427 states and 8696 transitions. Word has length 41 [2021-07-09 17:10:52,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:52,038 INFO L482 AbstractCegarLoop]: Abstraction has 3427 states and 8696 transitions. [2021-07-09 17:10:52,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:52,038 INFO L276 IsEmpty]: Start isEmpty. Operand 3427 states and 8696 transitions. [2021-07-09 17:10:52,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:52,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:52,042 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:52,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2021-07-09 17:10:52,257 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:52,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:52,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1463737886, now seen corresponding path program 34 times [2021-07-09 17:10:52,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:52,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343805871] [2021-07-09 17:10:52,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:52,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:52,314 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:52,315 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:52,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343805871] [2021-07-09 17:10:52,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343805871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:52,315 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2115911181] [2021-07-09 17:10:52,315 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:52,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:52,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:52,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:52,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:52,403 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:52,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2115911181] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:52,403 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:52,403 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:10:52,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43672499] [2021-07-09 17:10:52,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:52,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:52,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:52,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:52,404 INFO L87 Difference]: Start difference. First operand 3427 states and 8696 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:52,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:52,685 INFO L93 Difference]: Finished difference Result 4051 states and 9977 transitions. [2021-07-09 17:10:52,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:10:52,685 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:52,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:52,690 INFO L225 Difference]: With dead ends: 4051 [2021-07-09 17:10:52,690 INFO L226 Difference]: Without dead ends: 4047 [2021-07-09 17:10:52,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:52,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-07-09 17:10:52,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3315. [2021-07-09 17:10:52,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.55944477972239) internal successors, (8482), 3314 states have internal predecessors, (8482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8482 transitions. [2021-07-09 17:10:52,729 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8482 transitions. Word has length 41 [2021-07-09 17:10:52,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:52,729 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8482 transitions. [2021-07-09 17:10:52,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:52,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8482 transitions. [2021-07-09 17:10:52,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:52,732 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:52,732 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:52,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:52,936 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:52,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:52,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1197933026, now seen corresponding path program 74 times [2021-07-09 17:10:52,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:52,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768068630] [2021-07-09 17:10:52,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:53,003 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:53,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:53,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768068630] [2021-07-09 17:10:53,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768068630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:53,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363306534] [2021-07-09 17:10:53,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:53,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:53,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:53,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:53,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:53,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:10:53,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:10:53,079 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-07-09 17:10:53,079 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:10:53,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:10:53,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-07-09 17:10:53,084 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 12 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:53,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363306534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:53,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:53,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:10:53,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519952763] [2021-07-09 17:10:53,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:53,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:53,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:53,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:53,085 INFO L87 Difference]: Start difference. First operand 3315 states and 8482 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:53,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:53,200 INFO L93 Difference]: Finished difference Result 3335 states and 8513 transitions. [2021-07-09 17:10:53,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:10:53,200 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:53,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:53,204 INFO L225 Difference]: With dead ends: 3335 [2021-07-09 17:10:53,205 INFO L226 Difference]: Without dead ends: 3315 [2021-07-09 17:10:53,205 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 54.4ms TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:53,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-07-09 17:10:53,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 3315. [2021-07-09 17:10:53,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3315 states, 3314 states have (on average 2.5585395292697646) internal successors, (8479), 3314 states have internal predecessors, (8479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:53,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3315 states to 3315 states and 8479 transitions. [2021-07-09 17:10:53,252 INFO L78 Accepts]: Start accepts. Automaton has 3315 states and 8479 transitions. Word has length 41 [2021-07-09 17:10:53,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:53,252 INFO L482 AbstractCegarLoop]: Abstraction has 3315 states and 8479 transitions. [2021-07-09 17:10:53,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:53,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3315 states and 8479 transitions. [2021-07-09 17:10:53,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:53,255 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:53,255 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:53,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2021-07-09 17:10:53,470 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:53,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:53,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1045836265, now seen corresponding path program 75 times [2021-07-09 17:10:53,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:53,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496725215] [2021-07-09 17:10:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:53,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:53,513 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:53,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:53,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496725215] [2021-07-09 17:10:53,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496725215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:53,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163873298] [2021-07-09 17:10:53,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:53,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:10:53,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:53,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:53,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:53,598 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 27 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:53,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163873298] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:53,598 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:53,598 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:10:53,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022842265] [2021-07-09 17:10:53,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:53,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:53,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:53,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:53,599 INFO L87 Difference]: Start difference. First operand 3315 states and 8479 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:53,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:53,710 INFO L93 Difference]: Finished difference Result 4538 states and 11042 transitions. [2021-07-09 17:10:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:10:53,710 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:53,717 INFO L225 Difference]: With dead ends: 4538 [2021-07-09 17:10:53,717 INFO L226 Difference]: Without dead ends: 4538 [2021-07-09 17:10:53,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:53,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4538 states. [2021-07-09 17:10:53,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4538 to 3547. [2021-07-09 17:10:53,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3547 states, 3546 states have (on average 2.586576424139876) internal successors, (9172), 3546 states have internal predecessors, (9172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:53,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3547 states to 3547 states and 9172 transitions. [2021-07-09 17:10:53,769 INFO L78 Accepts]: Start accepts. Automaton has 3547 states and 9172 transitions. Word has length 41 [2021-07-09 17:10:53,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:53,769 INFO L482 AbstractCegarLoop]: Abstraction has 3547 states and 9172 transitions. [2021-07-09 17:10:53,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:53,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3547 states and 9172 transitions. [2021-07-09 17:10:53,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:53,772 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:53,772 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:53,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:53,980 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:53,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:53,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1283897782, now seen corresponding path program 35 times [2021-07-09 17:10:53,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:53,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349815099] [2021-07-09 17:10:53,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:53,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:54,045 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:54,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:54,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349815099] [2021-07-09 17:10:54,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349815099] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:54,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046743934] [2021-07-09 17:10:54,046 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:54,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:10:54,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:54,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:54,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 5 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:54,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046743934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:54,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:54,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:10:54,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627967439] [2021-07-09 17:10:54,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:54,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:54,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:54,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:54,136 INFO L87 Difference]: Start difference. First operand 3547 states and 9172 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:54,373 INFO L93 Difference]: Finished difference Result 4055 states and 10165 transitions. [2021-07-09 17:10:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:54,373 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:54,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:54,379 INFO L225 Difference]: With dead ends: 4055 [2021-07-09 17:10:54,379 INFO L226 Difference]: Without dead ends: 4047 [2021-07-09 17:10:54,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:54,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4047 states. [2021-07-09 17:10:54,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4047 to 3606. [2021-07-09 17:10:54,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3606 states, 3605 states have (on average 2.582246879334258) internal successors, (9309), 3605 states have internal predecessors, (9309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:54,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3606 states to 3606 states and 9309 transitions. [2021-07-09 17:10:54,424 INFO L78 Accepts]: Start accepts. Automaton has 3606 states and 9309 transitions. Word has length 41 [2021-07-09 17:10:54,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:54,424 INFO L482 AbstractCegarLoop]: Abstraction has 3606 states and 9309 transitions. [2021-07-09 17:10:54,424 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:54,424 INFO L276 IsEmpty]: Start isEmpty. Operand 3606 states and 9309 transitions. [2021-07-09 17:10:54,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:54,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:54,427 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:54,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-07-09 17:10:54,643 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:54,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1457372657, now seen corresponding path program 76 times [2021-07-09 17:10:54,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:54,644 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986026083] [2021-07-09 17:10:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:54,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:54,687 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:54,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:54,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986026083] [2021-07-09 17:10:54,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986026083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:54,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396781063] [2021-07-09 17:10:54,688 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:54,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:54,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:54,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:54,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:54,771 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:54,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396781063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:54,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:54,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:10:54,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446151667] [2021-07-09 17:10:54,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:54,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:54,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:54,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:54,772 INFO L87 Difference]: Start difference. First operand 3606 states and 9309 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:54,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:54,875 INFO L93 Difference]: Finished difference Result 4522 states and 10995 transitions. [2021-07-09 17:10:54,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:10:54,875 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:54,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:54,881 INFO L225 Difference]: With dead ends: 4522 [2021-07-09 17:10:54,881 INFO L226 Difference]: Without dead ends: 4519 [2021-07-09 17:10:54,881 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 40.2ms TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:54,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4519 states. [2021-07-09 17:10:54,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4519 to 3605. [2021-07-09 17:10:54,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3604 states have (on average 2.5812985571587124) internal successors, (9303), 3604 states have internal predecessors, (9303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:54,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9303 transitions. [2021-07-09 17:10:54,930 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9303 transitions. Word has length 41 [2021-07-09 17:10:54,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:54,930 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9303 transitions. [2021-07-09 17:10:54,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 8 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:54,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9303 transitions. [2021-07-09 17:10:54,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:54,933 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:54,933 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:55,138 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:55,138 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:55,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:55,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1664435223, now seen corresponding path program 77 times [2021-07-09 17:10:55,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:55,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098092875] [2021-07-09 17:10:55,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:55,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:55,196 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 32 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:55,197 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:55,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098092875] [2021-07-09 17:10:55,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098092875] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:55,197 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236111092] [2021-07-09 17:10:55,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:55,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:10:55,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:55,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:55,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:55,289 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 35 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:55,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1236111092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:55,290 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:55,290 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 10 [2021-07-09 17:10:55,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140797222] [2021-07-09 17:10:55,290 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:10:55,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:55,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:10:55,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:10:55,290 INFO L87 Difference]: Start difference. First operand 3605 states and 9303 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:55,419 INFO L93 Difference]: Finished difference Result 4564 states and 11216 transitions. [2021-07-09 17:10:55,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:10:55,420 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:55,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:55,426 INFO L225 Difference]: With dead ends: 4564 [2021-07-09 17:10:55,427 INFO L226 Difference]: Without dead ends: 4552 [2021-07-09 17:10:55,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:55,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4552 states. [2021-07-09 17:10:55,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4552 to 3605. [2021-07-09 17:10:55,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3605 states, 3604 states have (on average 2.5804661487236404) internal successors, (9300), 3604 states have internal predecessors, (9300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:55,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3605 states to 3605 states and 9300 transitions. [2021-07-09 17:10:55,481 INFO L78 Accepts]: Start accepts. Automaton has 3605 states and 9300 transitions. Word has length 41 [2021-07-09 17:10:55,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:55,481 INFO L482 AbstractCegarLoop]: Abstraction has 3605 states and 9300 transitions. [2021-07-09 17:10:55,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:55,481 INFO L276 IsEmpty]: Start isEmpty. Operand 3605 states and 9300 transitions. [2021-07-09 17:10:55,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:55,484 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:55,484 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:55,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:55,690 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:55,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:55,690 INFO L82 PathProgramCache]: Analyzing trace with hash 216435210, now seen corresponding path program 78 times [2021-07-09 17:10:55,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:55,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769621669] [2021-07-09 17:10:55,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:55,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:55,758 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 13 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:55,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:55,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769621669] [2021-07-09 17:10:55,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769621669] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:55,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344235098] [2021-07-09 17:10:55,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:55,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:10:55,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:55,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:55,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:55,854 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 9 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:55,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344235098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:55,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:55,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-07-09 17:10:55,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091262908] [2021-07-09 17:10:55,855 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:55,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:55,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:55,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:55,855 INFO L87 Difference]: Start difference. First operand 3605 states and 9300 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) [2021-07-09 17:10:56,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:56,210 INFO L93 Difference]: Finished difference Result 3907 states and 9798 transitions. [2021-07-09 17:10:56,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:56,211 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.111111111111111) internal successors, (46), 8 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:56,216 INFO L225 Difference]: With dead ends: 3907 [2021-07-09 17:10:56,216 INFO L226 Difference]: Without dead ends: 3810 [2021-07-09 17:10:56,216 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 89.1ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:56,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-07-09 17:10:56,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3511. [2021-07-09 17:10:56,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3511 states, 3510 states have (on average 2.5866096866096866) internal successors, (9079), 3510 states have internal predecessors, (9079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:56,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3511 states to 3511 states and 9079 transitions. [2021-07-09 17:10:56,262 INFO L78 Accepts]: Start accepts. Automaton has 3511 states and 9079 transitions. Word has length 41 [2021-07-09 17:10:56,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:56,262 INFO L482 AbstractCegarLoop]: Abstraction has 3511 states and 9079 transitions. [2021-07-09 17:10:56,262 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) [2021-07-09 17:10:56,262 INFO L276 IsEmpty]: Start isEmpty. Operand 3511 states and 9079 transitions. [2021-07-09 17:10:56,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:56,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:56,265 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:56,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2021-07-09 17:10:56,481 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:56,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:56,481 INFO L82 PathProgramCache]: Analyzing trace with hash -397100970, now seen corresponding path program 79 times [2021-07-09 17:10:56,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:56,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636710096] [2021-07-09 17:10:56,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:56,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 52 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:56,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:56,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636710096] [2021-07-09 17:10:56,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636710096] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:56,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925793641] [2021-07-09 17:10:56,540 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:56,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:56,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:10:56,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:56,660 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 53 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:10:56,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925793641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:56,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:56,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-07-09 17:10:56,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438454559] [2021-07-09 17:10:56,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:10:56,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:56,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:10:56,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:10:56,662 INFO L87 Difference]: Start difference. First operand 3511 states and 9079 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:56,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:56,885 INFO L93 Difference]: Finished difference Result 3950 states and 9921 transitions. [2021-07-09 17:10:56,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:10:56,886 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:56,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:56,892 INFO L225 Difference]: With dead ends: 3950 [2021-07-09 17:10:56,892 INFO L226 Difference]: Without dead ends: 3938 [2021-07-09 17:10:56,892 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 86.0ms TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:10:56,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-07-09 17:10:56,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 3513. [2021-07-09 17:10:56,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3513 states, 3512 states have (on average 2.5865603644646926) internal successors, (9084), 3512 states have internal predecessors, (9084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3513 states to 3513 states and 9084 transitions. [2021-07-09 17:10:56,942 INFO L78 Accepts]: Start accepts. Automaton has 3513 states and 9084 transitions. Word has length 41 [2021-07-09 17:10:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:56,942 INFO L482 AbstractCegarLoop]: Abstraction has 3513 states and 9084 transitions. [2021-07-09 17:10:56,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 3513 states and 9084 transitions. [2021-07-09 17:10:56,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:56,945 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:56,945 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:57,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-07-09 17:10:57,161 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:57,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:57,162 INFO L82 PathProgramCache]: Analyzing trace with hash -554400457, now seen corresponding path program 36 times [2021-07-09 17:10:57,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:57,162 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251744449] [2021-07-09 17:10:57,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:57,207 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 36 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:57,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:57,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251744449] [2021-07-09 17:10:57,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251744449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:57,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934701246] [2021-07-09 17:10:57,207 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:57,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:10:57,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:57,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:57,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:57,312 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:10:57,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934701246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:57,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:57,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 13 [2021-07-09 17:10:57,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165178799] [2021-07-09 17:10:57,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:10:57,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:57,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:10:57,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:57,313 INFO L87 Difference]: Start difference. First operand 3513 states and 9084 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:57,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:57,497 INFO L93 Difference]: Finished difference Result 4278 states and 10675 transitions. [2021-07-09 17:10:57,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:10:57,497 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:57,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:57,503 INFO L225 Difference]: With dead ends: 4278 [2021-07-09 17:10:57,503 INFO L226 Difference]: Without dead ends: 4268 [2021-07-09 17:10:57,503 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 84.2ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:10:57,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-07-09 17:10:57,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3755. [2021-07-09 17:10:57,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3755 states, 3754 states have (on average 2.587906233351092) internal successors, (9715), 3754 states have internal predecessors, (9715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:57,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3755 states to 3755 states and 9715 transitions. [2021-07-09 17:10:57,550 INFO L78 Accepts]: Start accepts. Automaton has 3755 states and 9715 transitions. Word has length 41 [2021-07-09 17:10:57,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:57,550 INFO L482 AbstractCegarLoop]: Abstraction has 3755 states and 9715 transitions. [2021-07-09 17:10:57,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:57,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3755 states and 9715 transitions. [2021-07-09 17:10:57,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:57,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:57,553 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:57,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable313,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:57,754 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:57,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:57,754 INFO L82 PathProgramCache]: Analyzing trace with hash 1744816364, now seen corresponding path program 80 times [2021-07-09 17:10:57,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:57,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624008955] [2021-07-09 17:10:57,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:57,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:57,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624008955] [2021-07-09 17:10:57,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624008955] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:57,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507264423] [2021-07-09 17:10:57,809 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:57,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:10:57,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:57,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:57,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:57,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:10:57,900 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:10:57,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:10:57,902 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:10:57,902 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:10:57,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:10:57,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:10:57,909 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:57,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507264423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:57,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:57,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:10:57,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112622952] [2021-07-09 17:10:57,909 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:10:57,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:57,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:10:57,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:57,909 INFO L87 Difference]: Start difference. First operand 3755 states and 9715 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:58,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:58,283 INFO L93 Difference]: Finished difference Result 5015 states and 12296 transitions. [2021-07-09 17:10:58,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:10:58,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:58,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:58,289 INFO L225 Difference]: With dead ends: 5015 [2021-07-09 17:10:58,289 INFO L226 Difference]: Without dead ends: 4961 [2021-07-09 17:10:58,290 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 153.4ms TimeCoverageRelationStatistics Valid=87, Invalid=419, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:10:58,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4961 states. [2021-07-09 17:10:58,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4961 to 3838. [2021-07-09 17:10:58,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3838 states, 3837 states have (on average 2.5882199635131613) internal successors, (9931), 3837 states have internal predecessors, (9931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:58,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3838 states to 3838 states and 9931 transitions. [2021-07-09 17:10:58,358 INFO L78 Accepts]: Start accepts. Automaton has 3838 states and 9931 transitions. Word has length 41 [2021-07-09 17:10:58,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:58,358 INFO L482 AbstractCegarLoop]: Abstraction has 3838 states and 9931 transitions. [2021-07-09 17:10:58,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 11 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:58,358 INFO L276 IsEmpty]: Start isEmpty. Operand 3838 states and 9931 transitions. [2021-07-09 17:10:58,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:58,362 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:58,362 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:58,579 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-07-09 17:10:58,580 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:58,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:58,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1017591823, now seen corresponding path program 81 times [2021-07-09 17:10:58,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:58,580 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500013411] [2021-07-09 17:10:58,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:58,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:58,634 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:58,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:58,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500013411] [2021-07-09 17:10:58,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500013411] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:58,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168042080] [2021-07-09 17:10:58,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:58,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:10:58,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:58,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:10:58,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:58,753 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:10:58,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168042080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:58,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:58,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:10:58,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54718710] [2021-07-09 17:10:58,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:10:58,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:58,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:10:58,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:10:58,754 INFO L87 Difference]: Start difference. First operand 3838 states and 9931 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:58,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:58,868 INFO L93 Difference]: Finished difference Result 4722 states and 11676 transitions. [2021-07-09 17:10:58,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:10:58,868 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:58,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:58,874 INFO L225 Difference]: With dead ends: 4722 [2021-07-09 17:10:58,874 INFO L226 Difference]: Without dead ends: 4704 [2021-07-09 17:10:58,874 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 61.6ms TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:10:58,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4704 states. [2021-07-09 17:10:58,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4704 to 3928. [2021-07-09 17:10:58,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 2.6002037178507766) internal successors, (10211), 3927 states have internal predecessors, (10211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:58,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 10211 transitions. [2021-07-09 17:10:58,925 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 10211 transitions. Word has length 41 [2021-07-09 17:10:58,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:58,925 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 10211 transitions. [2021-07-09 17:10:58,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:58,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 10211 transitions. [2021-07-09 17:10:58,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:58,928 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:58,928 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:10:59,140 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable317,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:59,141 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:10:59,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:10:59,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1899652898, now seen corresponding path program 82 times [2021-07-09 17:10:59,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:10:59,141 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [261009602] [2021-07-09 17:10:59,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:10:59,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:10:59,202 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:59,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:10:59,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [261009602] [2021-07-09 17:10:59,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [261009602] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:59,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508928529] [2021-07-09 17:10:59,203 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:10:59,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:10:59,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:10:59,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 24 conjunts are in the unsatisfiable core [2021-07-09 17:10:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:10:59,308 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:10:59,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:10:59,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:10:59,311 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:10:59,311 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:10:59,311 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:10:59,311 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:10:59,317 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 14 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:10:59,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508928529] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:10:59,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:10:59,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:10:59,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107546031] [2021-07-09 17:10:59,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:10:59,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:10:59,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:10:59,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:10:59,318 INFO L87 Difference]: Start difference. First operand 3928 states and 10211 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:59,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:10:59,928 INFO L93 Difference]: Finished difference Result 7135 states and 16888 transitions. [2021-07-09 17:10:59,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:10:59,929 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:10:59,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:10:59,937 INFO L225 Difference]: With dead ends: 7135 [2021-07-09 17:10:59,937 INFO L226 Difference]: Without dead ends: 6955 [2021-07-09 17:10:59,937 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 297.2ms TimeCoverageRelationStatistics Valid=213, Invalid=1269, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:10:59,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6955 states. [2021-07-09 17:10:59,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6955 to 4145. [2021-07-09 17:10:59,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 2.5921814671814674) internal successors, (10742), 4144 states have internal predecessors, (10742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:59,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10742 transitions. [2021-07-09 17:10:59,995 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10742 transitions. Word has length 41 [2021-07-09 17:10:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:10:59,995 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10742 transitions. [2021-07-09 17:10:59,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:10:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10742 transitions. [2021-07-09 17:10:59,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:10:59,998 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:10:59,998 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:00,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-07-09 17:11:00,213 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:00,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:00,213 INFO L82 PathProgramCache]: Analyzing trace with hash -2008711721, now seen corresponding path program 83 times [2021-07-09 17:11:00,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:00,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079894361] [2021-07-09 17:11:00,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:00,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:00,270 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:00,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:00,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079894361] [2021-07-09 17:11:00,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079894361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:00,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975781242] [2021-07-09 17:11:00,271 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:00,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:11:00,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:00,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:11:00,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:00,387 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 22 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:00,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [975781242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:00,387 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:00,387 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-07-09 17:11:00,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578255394] [2021-07-09 17:11:00,387 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:11:00,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:00,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:11:00,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:00,388 INFO L87 Difference]: Start difference. First operand 4145 states and 10742 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:00,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:00,577 INFO L93 Difference]: Finished difference Result 5126 states and 12564 transitions. [2021-07-09 17:11:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:00,578 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:11:00,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:00,585 INFO L225 Difference]: With dead ends: 5126 [2021-07-09 17:11:00,585 INFO L226 Difference]: Without dead ends: 5099 [2021-07-09 17:11:00,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 87.2ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:11:00,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-07-09 17:11:00,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 4145. [2021-07-09 17:11:00,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4145 states, 4144 states have (on average 2.591457528957529) internal successors, (10739), 4144 states have internal predecessors, (10739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:00,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4145 states to 4145 states and 10739 transitions. [2021-07-09 17:11:00,646 INFO L78 Accepts]: Start accepts. Automaton has 4145 states and 10739 transitions. Word has length 41 [2021-07-09 17:11:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:00,646 INFO L482 AbstractCegarLoop]: Abstraction has 4145 states and 10739 transitions. [2021-07-09 17:11:00,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4145 states and 10739 transitions. [2021-07-09 17:11:00,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:11:00,650 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:00,650 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:00,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-07-09 17:11:00,866 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:00,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:00,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1839961388, now seen corresponding path program 84 times [2021-07-09 17:11:00,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:00,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984761961] [2021-07-09 17:11:00,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:00,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 11 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:00,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:00,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984761961] [2021-07-09 17:11:00,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984761961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:00,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186763417] [2021-07-09 17:11:00,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:00,965 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:11:00,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:00,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:11:00,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:01,021 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:01,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186763417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:01,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:01,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:11:01,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117770733] [2021-07-09 17:11:01,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:11:01,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:01,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:11:01,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:11:01,022 INFO L87 Difference]: Start difference. First operand 4145 states and 10739 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:01,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:01,933 INFO L93 Difference]: Finished difference Result 8258 states and 19418 transitions. [2021-07-09 17:11:01,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 17:11:01,934 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:11:01,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:01,947 INFO L225 Difference]: With dead ends: 8258 [2021-07-09 17:11:01,947 INFO L226 Difference]: Without dead ends: 7982 [2021-07-09 17:11:01,948 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1320 ImplicationChecksByTransitivity, 570.2ms TimeCoverageRelationStatistics Valid=483, Invalid=3423, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 17:11:01,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7982 states. [2021-07-09 17:11:02,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7982 to 4501. [2021-07-09 17:11:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 2.5802222222222224) internal successors, (11611), 4500 states have internal predecessors, (11611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:02,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11611 transitions. [2021-07-09 17:11:02,034 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11611 transitions. Word has length 41 [2021-07-09 17:11:02,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:02,034 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11611 transitions. [2021-07-09 17:11:02,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:02,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11611 transitions. [2021-07-09 17:11:02,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:11:02,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:02,038 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:02,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2021-07-09 17:11:02,248 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:02,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:02,248 INFO L82 PathProgramCache]: Analyzing trace with hash -561433039, now seen corresponding path program 85 times [2021-07-09 17:11:02,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:02,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155920079] [2021-07-09 17:11:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:02,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:02,314 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:02,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:02,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155920079] [2021-07-09 17:11:02,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155920079] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:02,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229068382] [2021-07-09 17:11:02,314 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 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:02,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:11:02,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:02,398 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 26 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:02,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229068382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:02,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:02,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:11:02,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223217878] [2021-07-09 17:11:02,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:11:02,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:02,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:11:02,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:11:02,398 INFO L87 Difference]: Start difference. First operand 4501 states and 11611 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:02,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:02,549 INFO L93 Difference]: Finished difference Result 5578 states and 13597 transitions. [2021-07-09 17:11:02,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:02,549 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:11:02,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:02,557 INFO L225 Difference]: With dead ends: 5578 [2021-07-09 17:11:02,557 INFO L226 Difference]: Without dead ends: 5542 [2021-07-09 17:11:02,557 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 88.7ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:11:02,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5542 states. [2021-07-09 17:11:02,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5542 to 4501. [2021-07-09 17:11:02,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 2.5795555555555554) internal successors, (11608), 4500 states have internal predecessors, (11608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:02,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 11608 transitions. [2021-07-09 17:11:02,626 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 11608 transitions. Word has length 41 [2021-07-09 17:11:02,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:02,626 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 11608 transitions. [2021-07-09 17:11:02,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:02,626 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 11608 transitions. [2021-07-09 17:11:02,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:11:02,630 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:02,630 INFO L508 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:02,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:02,834 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:02,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:02,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1686647522, now seen corresponding path program 86 times [2021-07-09 17:11:02,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:02,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648604158] [2021-07-09 17:11:02,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:02,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:02,913 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:02,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:02,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648604158] [2021-07-09 17:11:02,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648604158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:02,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085236988] [2021-07-09 17:11:02,913 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 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:02,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:02,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:11:02,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:02,990 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:02,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2085236988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:02,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:02,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:11:02,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993773105] [2021-07-09 17:11:02,991 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:11:02,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:02,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:11:02,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:02,991 INFO L87 Difference]: Start difference. First operand 4501 states and 11608 transitions. Second operand has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:03,354 INFO L93 Difference]: Finished difference Result 5731 states and 13840 transitions. [2021-07-09 17:11:03,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:11:03,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:11:03,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:03,361 INFO L225 Difference]: With dead ends: 5731 [2021-07-09 17:11:03,362 INFO L226 Difference]: Without dead ends: 5353 [2021-07-09 17:11:03,372 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 196.8ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:11:03,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5353 states. [2021-07-09 17:11:03,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5353 to 3673. [2021-07-09 17:11:03,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3673 states, 3672 states have (on average 2.6173747276688455) internal successors, (9611), 3672 states have internal predecessors, (9611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:03,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3673 states to 3673 states and 9611 transitions. [2021-07-09 17:11:03,417 INFO L78 Accepts]: Start accepts. Automaton has 3673 states and 9611 transitions. Word has length 41 [2021-07-09 17:11:03,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:03,418 INFO L482 AbstractCegarLoop]: Abstraction has 3673 states and 9611 transitions. [2021-07-09 17:11:03,418 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3076923076923075) internal successors, (43), 12 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:03,418 INFO L276 IsEmpty]: Start isEmpty. Operand 3673 states and 9611 transitions. [2021-07-09 17:11:03,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:11:03,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:03,420 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:03,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-07-09 17:11:03,636 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:03,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:03,636 INFO L82 PathProgramCache]: Analyzing trace with hash 826705595, now seen corresponding path program 37 times [2021-07-09 17:11:03,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:03,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695970588] [2021-07-09 17:11:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 48 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:03,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:03,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695970588] [2021-07-09 17:11:03,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695970588] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:03,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135951269] [2021-07-09 17:11:03,681 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:03,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:11:03,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:03,791 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 49 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:03,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135951269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:03,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:03,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-07-09 17:11:03,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428238443] [2021-07-09 17:11:03,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:03,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:03,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:03,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:03,792 INFO L87 Difference]: Start difference. First operand 3673 states and 9611 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:04,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:04,037 INFO L93 Difference]: Finished difference Result 4473 states and 11190 transitions. [2021-07-09 17:11:04,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:11:04,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:11:04,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:04,043 INFO L225 Difference]: With dead ends: 4473 [2021-07-09 17:11:04,043 INFO L226 Difference]: Without dead ends: 4473 [2021-07-09 17:11:04,043 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:04,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4473 states. [2021-07-09 17:11:04,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4473 to 3628. [2021-07-09 17:11:04,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 2.626413013509788) internal successors, (9526), 3627 states have internal predecessors, (9526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:04,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 9526 transitions. [2021-07-09 17:11:04,085 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 9526 transitions. Word has length 41 [2021-07-09 17:11:04,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:04,085 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 9526 transitions. [2021-07-09 17:11:04,085 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:04,085 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 9526 transitions. [2021-07-09 17:11:04,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-07-09 17:11:04,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:04,088 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:04,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:04,303 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:04,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:04,304 INFO L82 PathProgramCache]: Analyzing trace with hash -1858902121, now seen corresponding path program 87 times [2021-07-09 17:11:04,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:04,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042434519] [2021-07-09 17:11:04,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:04,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:04,395 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:04,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:04,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042434519] [2021-07-09 17:11:04,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042434519] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:04,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893582443] [2021-07-09 17:11:04,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:04,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-09 17:11:04,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:04,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-09 17:11:04,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:04,486 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 37 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:04,486 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893582443] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:04,486 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:04,486 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:11:04,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7069718] [2021-07-09 17:11:04,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:11:04,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:04,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:11:04,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:04,487 INFO L87 Difference]: Start difference. First operand 3628 states and 9526 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:04,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:04,673 INFO L93 Difference]: Finished difference Result 4326 states and 10808 transitions. [2021-07-09 17:11:04,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:04,673 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-07-09 17:11:04,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:04,680 INFO L225 Difference]: With dead ends: 4326 [2021-07-09 17:11:04,680 INFO L226 Difference]: Without dead ends: 4279 [2021-07-09 17:11:04,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:11:04,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-07-09 17:11:04,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3637. [2021-07-09 17:11:04,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 2.623762376237624) internal successors, (9540), 3636 states have internal predecessors, (9540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:04,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 9540 transitions. [2021-07-09 17:11:04,740 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 9540 transitions. Word has length 41 [2021-07-09 17:11:04,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:04,740 INFO L482 AbstractCegarLoop]: Abstraction has 3637 states and 9540 transitions. [2021-07-09 17:11:04,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 12 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:04,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 9540 transitions. [2021-07-09 17:11:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 17:11:04,743 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:04,743 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:04,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2021-07-09 17:11:04,944 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:04,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:04,944 INFO L82 PathProgramCache]: Analyzing trace with hash 714915480, now seen corresponding path program 88 times [2021-07-09 17:11:04,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:04,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89828535] [2021-07-09 17:11:04,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:04,991 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:04,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:04,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89828535] [2021-07-09 17:11:04,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [89828535] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:04,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860152002] [2021-07-09 17:11:04,991 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:05,019 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:05,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:05,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:11:05,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:05,225 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 35 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:05,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860152002] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:05,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:05,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 13] total 19 [2021-07-09 17:11:05,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424575243] [2021-07-09 17:11:05,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:11:05,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:05,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:11:05,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:11:05,226 INFO L87 Difference]: Start difference. First operand 3637 states and 9540 transitions. Second operand has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:06,167 INFO L93 Difference]: Finished difference Result 5488 states and 13282 transitions. [2021-07-09 17:11:06,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:11:06,168 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 17:11:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:06,175 INFO L225 Difference]: With dead ends: 5488 [2021-07-09 17:11:06,175 INFO L226 Difference]: Without dead ends: 5450 [2021-07-09 17:11:06,175 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 542.1ms TimeCoverageRelationStatistics Valid=473, Invalid=1783, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:11:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-07-09 17:11:06,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4188. [2021-07-09 17:11:06,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4188 states, 4187 states have (on average 2.571053260090757) internal successors, (10765), 4187 states have internal predecessors, (10765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:06,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4188 states to 4188 states and 10765 transitions. [2021-07-09 17:11:06,230 INFO L78 Accepts]: Start accepts. Automaton has 4188 states and 10765 transitions. Word has length 44 [2021-07-09 17:11:06,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:06,230 INFO L482 AbstractCegarLoop]: Abstraction has 4188 states and 10765 transitions. [2021-07-09 17:11:06,230 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.35) internal successors, (87), 19 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:06,230 INFO L276 IsEmpty]: Start isEmpty. Operand 4188 states and 10765 transitions. [2021-07-09 17:11:06,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 17:11:06,234 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:06,234 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:06,450 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2021-07-09 17:11:06,450 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:06,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:06,451 INFO L82 PathProgramCache]: Analyzing trace with hash 667584024, now seen corresponding path program 89 times [2021-07-09 17:11:06,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:06,451 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870926749] [2021-07-09 17:11:06,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:06,508 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:11:06,508 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:06,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870926749] [2021-07-09 17:11:06,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870926749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:06,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742591376] [2021-07-09 17:11:06,509 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:06,535 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:11:06,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:06,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:11:06,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:06,583 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:11:06,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742591376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:06,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:06,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:11:06,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326992847] [2021-07-09 17:11:06,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:11:06,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:06,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:11:06,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:11:06,584 INFO L87 Difference]: Start difference. First operand 4188 states and 10765 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) [2021-07-09 17:11:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:06,763 INFO L93 Difference]: Finished difference Result 4818 states and 11987 transitions. [2021-07-09 17:11:06,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:11:06,763 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 17:11:06,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:06,771 INFO L225 Difference]: With dead ends: 4818 [2021-07-09 17:11:06,771 INFO L226 Difference]: Without dead ends: 4783 [2021-07-09 17:11:06,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 33.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:11:06,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4783 states. [2021-07-09 17:11:06,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4783 to 4206. [2021-07-09 17:11:06,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4206 states, 4205 states have (on average 2.5690844233055885) internal successors, (10803), 4205 states have internal predecessors, (10803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:06,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4206 states to 4206 states and 10803 transitions. [2021-07-09 17:11:06,829 INFO L78 Accepts]: Start accepts. Automaton has 4206 states and 10803 transitions. Word has length 44 [2021-07-09 17:11:06,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:06,829 INFO L482 AbstractCegarLoop]: Abstraction has 4206 states and 10803 transitions. [2021-07-09 17:11:06,829 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) [2021-07-09 17:11:06,829 INFO L276 IsEmpty]: Start isEmpty. Operand 4206 states and 10803 transitions. [2021-07-09 17:11:06,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 17:11:06,833 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:06,833 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:07,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:07,049 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:07,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:07,049 INFO L82 PathProgramCache]: Analyzing trace with hash -19269454, now seen corresponding path program 90 times [2021-07-09 17:11:07,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:07,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522455204] [2021-07-09 17:11:07,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:07,101 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:11:07,101 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:07,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522455204] [2021-07-09 17:11:07,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522455204] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:07,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89369891] [2021-07-09 17:11:07,101 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:07,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:11:07,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:07,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:11:07,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:07,264 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 19 proven. 60 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:07,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89369891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:07,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:07,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:11:07,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028292014] [2021-07-09 17:11:07,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:11:07,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:07,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:11:07,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:07,265 INFO L87 Difference]: Start difference. First operand 4206 states and 10803 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:07,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:07,916 INFO L93 Difference]: Finished difference Result 6446 states and 15040 transitions. [2021-07-09 17:11:07,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:11:07,916 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 17:11:07,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:07,926 INFO L225 Difference]: With dead ends: 6446 [2021-07-09 17:11:07,927 INFO L226 Difference]: Without dead ends: 6383 [2021-07-09 17:11:07,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 296.3ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:11:07,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6383 states. [2021-07-09 17:11:08,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6383 to 4276. [2021-07-09 17:11:08,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4276 states, 4275 states have (on average 2.56046783625731) internal successors, (10946), 4275 states have internal predecessors, (10946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:08,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4276 states to 4276 states and 10946 transitions. [2021-07-09 17:11:08,019 INFO L78 Accepts]: Start accepts. Automaton has 4276 states and 10946 transitions. Word has length 44 [2021-07-09 17:11:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:08,019 INFO L482 AbstractCegarLoop]: Abstraction has 4276 states and 10946 transitions. [2021-07-09 17:11:08,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4276 states and 10946 transitions. [2021-07-09 17:11:08,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 17:11:08,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:08,025 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:08,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable347 [2021-07-09 17:11:08,249 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:08,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:08,249 INFO L82 PathProgramCache]: Analyzing trace with hash -847034408, now seen corresponding path program 91 times [2021-07-09 17:11:08,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:08,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176147385] [2021-07-09 17:11:08,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:08,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:08,304 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:11:08,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:08,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176147385] [2021-07-09 17:11:08,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176147385] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:08,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60173915] [2021-07-09 17:11:08,305 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:08,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:08,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:11:08,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:08,393 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:11:08,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60173915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:08,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:08,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-07-09 17:11:08,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220928848] [2021-07-09 17:11:08,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-09 17:11:08,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:08,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-09 17:11:08,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:11:08,394 INFO L87 Difference]: Start difference. First operand 4276 states and 10946 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) [2021-07-09 17:11:08,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:08,580 INFO L93 Difference]: Finished difference Result 4915 states and 12209 transitions. [2021-07-09 17:11:08,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-09 17:11:08,580 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.25) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 17:11:08,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:08,588 INFO L225 Difference]: With dead ends: 4915 [2021-07-09 17:11:08,588 INFO L226 Difference]: Without dead ends: 4877 [2021-07-09 17:11:08,588 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-07-09 17:11:08,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4877 states. [2021-07-09 17:11:08,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4877 to 4348. [2021-07-09 17:11:08,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4348 states, 4347 states have (on average 2.5500345065562455) internal successors, (11085), 4347 states have internal predecessors, (11085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:08,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4348 states to 4348 states and 11085 transitions. [2021-07-09 17:11:08,647 INFO L78 Accepts]: Start accepts. Automaton has 4348 states and 11085 transitions. Word has length 44 [2021-07-09 17:11:08,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:08,648 INFO L482 AbstractCegarLoop]: Abstraction has 4348 states and 11085 transitions. [2021-07-09 17:11:08,648 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) [2021-07-09 17:11:08,648 INFO L276 IsEmpty]: Start isEmpty. Operand 4348 states and 11085 transitions. [2021-07-09 17:11:08,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 17:11:08,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:08,652 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:08,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable348,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:08,861 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:08,861 INFO L82 PathProgramCache]: Analyzing trace with hash 909434610, now seen corresponding path program 92 times [2021-07-09 17:11:08,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:08,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043348335] [2021-07-09 17:11:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:11:08,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:08,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043348335] [2021-07-09 17:11:08,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043348335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:08,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250892006] [2021-07-09 17:11:08,908 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:08,933 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:08,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:08,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:11:08,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 17 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:09,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250892006] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:09,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:09,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:11:09,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965544158] [2021-07-09 17:11:09,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:11:09,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:09,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:11:09,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:09,052 INFO L87 Difference]: Start difference. First operand 4348 states and 11085 transitions. Second operand has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:09,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:09,679 INFO L93 Difference]: Finished difference Result 6734 states and 15579 transitions. [2021-07-09 17:11:09,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:11:09,680 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 17:11:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:09,690 INFO L225 Difference]: With dead ends: 6734 [2021-07-09 17:11:09,691 INFO L226 Difference]: Without dead ends: 6671 [2021-07-09 17:11:09,691 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 262.0ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:11:09,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6671 states. [2021-07-09 17:11:09,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6671 to 4452. [2021-07-09 17:11:09,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4452 states, 4451 states have (on average 2.5362839811278364) internal successors, (11289), 4451 states have internal predecessors, (11289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:09,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4452 states to 4452 states and 11289 transitions. [2021-07-09 17:11:09,767 INFO L78 Accepts]: Start accepts. Automaton has 4452 states and 11289 transitions. Word has length 44 [2021-07-09 17:11:09,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:09,767 INFO L482 AbstractCegarLoop]: Abstraction has 4452 states and 11289 transitions. [2021-07-09 17:11:09,767 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.6) internal successors, (84), 14 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:09,767 INFO L276 IsEmpty]: Start isEmpty. Operand 4452 states and 11289 transitions. [2021-07-09 17:11:09,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-07-09 17:11:09,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:09,773 INFO L508 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:09,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable349,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:09,989 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:09,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:09,989 INFO L82 PathProgramCache]: Analyzing trace with hash -2003584616, now seen corresponding path program 93 times [2021-07-09 17:11:09,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:09,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321184741] [2021-07-09 17:11:09,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:09,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:10,035 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:10,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:10,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321184741] [2021-07-09 17:11:10,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321184741] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:10,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576580290] [2021-07-09 17:11:10,035 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:10,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:11:10,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:10,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 15 conjunts are in the unsatisfiable core [2021-07-09 17:11:10,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:10,195 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 26 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:10,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576580290] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:10,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:10,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-09 17:11:10,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979549559] [2021-07-09 17:11:10,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:11:10,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:10,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:11:10,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:10,196 INFO L87 Difference]: Start difference. First operand 4452 states and 11289 transitions. Second operand has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:10,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:10,877 INFO L93 Difference]: Finished difference Result 7036 states and 16396 transitions. [2021-07-09 17:11:10,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:11:10,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-07-09 17:11:10,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:10,889 INFO L225 Difference]: With dead ends: 7036 [2021-07-09 17:11:10,889 INFO L226 Difference]: Without dead ends: 6998 [2021-07-09 17:11:10,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 299.5ms TimeCoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:11:10,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6998 states. [2021-07-09 17:11:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6998 to 4889. [2021-07-09 17:11:10,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4889 states, 4888 states have (on average 2.5384615384615383) internal successors, (12408), 4888 states have internal predecessors, (12408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:10,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4889 states to 4889 states and 12408 transitions. [2021-07-09 17:11:10,973 INFO L78 Accepts]: Start accepts. Automaton has 4889 states and 12408 transitions. Word has length 44 [2021-07-09 17:11:10,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:10,973 INFO L482 AbstractCegarLoop]: Abstraction has 4889 states and 12408 transitions. [2021-07-09 17:11:10,973 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.733333333333333) internal successors, (86), 14 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:10,973 INFO L276 IsEmpty]: Start isEmpty. Operand 4889 states and 12408 transitions. [2021-07-09 17:11:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:10,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:10,979 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:11,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:11,195 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:11,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:11,195 INFO L82 PathProgramCache]: Analyzing trace with hash 106678869, now seen corresponding path program 38 times [2021-07-09 17:11:11,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:11,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552546469] [2021-07-09 17:11:11,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:11,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:11,305 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:11,305 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:11,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552546469] [2021-07-09 17:11:11,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552546469] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:11,305 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911757405] [2021-07-09 17:11:11,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:11,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:11,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:11,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:11:11,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:11,998 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:11,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911757405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:11,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:11,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 29 [2021-07-09 17:11:11,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163063324] [2021-07-09 17:11:11,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-07-09 17:11:11,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:11,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-07-09 17:11:11,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:11:11,999 INFO L87 Difference]: Start difference. First operand 4889 states and 12408 transitions. Second operand has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:19,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:19,954 INFO L93 Difference]: Finished difference Result 12578 states and 28875 transitions. [2021-07-09 17:11:19,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2021-07-09 17:11:19,954 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:19,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:19,975 INFO L225 Difference]: With dead ends: 12578 [2021-07-09 17:11:19,975 INFO L226 Difference]: Without dead ends: 12155 [2021-07-09 17:11:19,980 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 210 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17409 ImplicationChecksByTransitivity, 6552.3ms TimeCoverageRelationStatistics Valid=5955, Invalid=38777, Unknown=0, NotChecked=0, Total=44732 [2021-07-09 17:11:19,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12155 states. [2021-07-09 17:11:20,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12155 to 6139. [2021-07-09 17:11:20,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6139 states, 6138 states have (on average 2.623330074942978) internal successors, (16102), 6138 states have internal predecessors, (16102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:20,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6139 states to 6139 states and 16102 transitions. [2021-07-09 17:11:20,126 INFO L78 Accepts]: Start accepts. Automaton has 6139 states and 16102 transitions. Word has length 47 [2021-07-09 17:11:20,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:20,126 INFO L482 AbstractCegarLoop]: Abstraction has 6139 states and 16102 transitions. [2021-07-09 17:11:20,126 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.8666666666666667) internal successors, (86), 29 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:20,126 INFO L276 IsEmpty]: Start isEmpty. Operand 6139 states and 16102 transitions. [2021-07-09 17:11:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:20,133 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:20,133 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:20,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:20,341 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:20,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:20,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1531001323, now seen corresponding path program 94 times [2021-07-09 17:11:20,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:20,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552972319] [2021-07-09 17:11:20,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:20,480 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:20,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552972319] [2021-07-09 17:11:20,480 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [552972319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:20,480 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992676116] [2021-07-09 17:11:20,480 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:20,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:20,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:20,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:20,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992676116] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:20,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:20,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-07-09 17:11:20,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805033275] [2021-07-09 17:11:20,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:11:20,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:20,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:11:20,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:11:20,763 INFO L87 Difference]: Start difference. First operand 6139 states and 16102 transitions. Second operand has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:21,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:21,462 INFO L93 Difference]: Finished difference Result 6357 states and 16438 transitions. [2021-07-09 17:11:21,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:21,462 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:21,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:21,471 INFO L225 Difference]: With dead ends: 6357 [2021-07-09 17:11:21,471 INFO L226 Difference]: Without dead ends: 6277 [2021-07-09 17:11:21,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:11:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6277 states. [2021-07-09 17:11:21,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6277 to 6123. [2021-07-09 17:11:21,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6123 states, 6122 states have (on average 2.6210388761842536) internal successors, (16046), 6122 states have internal predecessors, (16046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:21,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6123 states to 6123 states and 16046 transitions. [2021-07-09 17:11:21,543 INFO L78 Accepts]: Start accepts. Automaton has 6123 states and 16046 transitions. Word has length 47 [2021-07-09 17:11:21,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:21,543 INFO L482 AbstractCegarLoop]: Abstraction has 6123 states and 16046 transitions. [2021-07-09 17:11:21,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.35) internal successors, (67), 19 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:21,543 INFO L276 IsEmpty]: Start isEmpty. Operand 6123 states and 16046 transitions. [2021-07-09 17:11:21,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:21,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:21,548 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:21,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,183 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:21,764 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:21,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:21,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1758131688, now seen corresponding path program 39 times [2021-07-09 17:11:21,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:21,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054309391] [2021-07-09 17:11:21,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:21,824 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:21,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054309391] [2021-07-09 17:11:21,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054309391] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:21,824 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253783926] [2021-07-09 17:11:21,824 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:21,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:11:21,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:21,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:21,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:21,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253783926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:21,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:21,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-09 17:11:21,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426379213] [2021-07-09 17:11:21,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:21,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:21,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:21,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:21,947 INFO L87 Difference]: Start difference. First operand 6123 states and 16046 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:22,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:22,098 INFO L93 Difference]: Finished difference Result 8127 states and 20029 transitions. [2021-07-09 17:11:22,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:22,099 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:22,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:22,109 INFO L225 Difference]: With dead ends: 8127 [2021-07-09 17:11:22,110 INFO L226 Difference]: Without dead ends: 8117 [2021-07-09 17:11:22,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 66.6ms TimeCoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:22,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-07-09 17:11:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6179. [2021-07-09 17:11:22,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6179 states, 6178 states have (on average 2.6264163159598577) internal successors, (16226), 6178 states have internal predecessors, (16226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:22,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6179 states to 6179 states and 16226 transitions. [2021-07-09 17:11:22,197 INFO L78 Accepts]: Start accepts. Automaton has 6179 states and 16226 transitions. Word has length 47 [2021-07-09 17:11:22,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:22,197 INFO L482 AbstractCegarLoop]: Abstraction has 6179 states and 16226 transitions. [2021-07-09 17:11:22,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:22,197 INFO L276 IsEmpty]: Start isEmpty. Operand 6179 states and 16226 transitions. [2021-07-09 17:11:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:22,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:22,203 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:22,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:22,418 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:22,419 INFO L82 PathProgramCache]: Analyzing trace with hash 800939048, now seen corresponding path program 40 times [2021-07-09 17:11:22,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:22,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584236016] [2021-07-09 17:11:22,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:22,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:22,471 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 59 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:22,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:22,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584236016] [2021-07-09 17:11:22,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584236016] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:22,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581284160] [2021-07-09 17:11:22,471 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:22,495 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:22,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:22,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:22,496 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:22,569 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:22,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581284160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:22,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:22,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-09 17:11:22,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571977592] [2021-07-09 17:11:22,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:22,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:22,570 INFO L87 Difference]: Start difference. First operand 6179 states and 16226 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:22,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:22,724 INFO L93 Difference]: Finished difference Result 9199 states and 22998 transitions. [2021-07-09 17:11:22,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:22,724 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:22,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:22,739 INFO L225 Difference]: With dead ends: 9199 [2021-07-09 17:11:22,739 INFO L226 Difference]: Without dead ends: 9199 [2021-07-09 17:11:22,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 58.0ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:11:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9199 states. [2021-07-09 17:11:22,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9199 to 6799. [2021-07-09 17:11:22,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6799 states, 6798 states have (on average 2.674315975286849) internal successors, (18180), 6798 states have internal predecessors, (18180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6799 states to 6799 states and 18180 transitions. [2021-07-09 17:11:22,847 INFO L78 Accepts]: Start accepts. Automaton has 6799 states and 18180 transitions. Word has length 47 [2021-07-09 17:11:22,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:22,847 INFO L482 AbstractCegarLoop]: Abstraction has 6799 states and 18180 transitions. [2021-07-09 17:11:22,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:22,847 INFO L276 IsEmpty]: Start isEmpty. Operand 6799 states and 18180 transitions. [2021-07-09 17:11:22,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:22,852 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:22,852 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:23,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable365 [2021-07-09 17:11:23,068 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:23,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:23,068 INFO L82 PathProgramCache]: Analyzing trace with hash 267073672, now seen corresponding path program 95 times [2021-07-09 17:11:23,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:23,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902007592] [2021-07-09 17:11:23,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:23,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 48 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:23,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:23,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902007592] [2021-07-09 17:11:23,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902007592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:23,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928270755] [2021-07-09 17:11:23,128 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:23,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:11:23,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:23,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:23,253 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:23,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928270755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:23,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:23,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 15 [2021-07-09 17:11:23,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034189808] [2021-07-09 17:11:23,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:11:23,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:23,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:11:23,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:11:23,254 INFO L87 Difference]: Start difference. First operand 6799 states and 18180 transitions. Second operand has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:23,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:23,461 INFO L93 Difference]: Finished difference Result 7639 states and 19695 transitions. [2021-07-09 17:11:23,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:23,461 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:23,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:23,474 INFO L225 Difference]: With dead ends: 7639 [2021-07-09 17:11:23,474 INFO L226 Difference]: Without dead ends: 7633 [2021-07-09 17:11:23,474 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 87.3ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:11:23,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7633 states. [2021-07-09 17:11:23,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7633 to 6743. [2021-07-09 17:11:23,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6743 states, 6742 states have (on average 2.6702758825274397) internal successors, (18003), 6742 states have internal predecessors, (18003), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6743 states to 6743 states and 18003 transitions. [2021-07-09 17:11:23,584 INFO L78 Accepts]: Start accepts. Automaton has 6743 states and 18003 transitions. Word has length 47 [2021-07-09 17:11:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:23,585 INFO L482 AbstractCegarLoop]: Abstraction has 6743 states and 18003 transitions. [2021-07-09 17:11:23,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.5) internal successors, (72), 15 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 6743 states and 18003 transitions. [2021-07-09 17:11:23,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:23,591 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:23,591 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:23,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-07-09 17:11:23,807 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:23,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:23,807 INFO L82 PathProgramCache]: Analyzing trace with hash -38499627, now seen corresponding path program 41 times [2021-07-09 17:11:23,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:23,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247539683] [2021-07-09 17:11:23,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:23,876 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:23,876 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:23,876 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247539683] [2021-07-09 17:11:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247539683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:23,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935276575] [2021-07-09 17:11:23,877 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:23,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:11:23,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:23,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:23,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:23,972 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:23,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935276575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:23,972 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:23,972 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:11:23,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543026281] [2021-07-09 17:11:23,972 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:23,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:23,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:23,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:23,973 INFO L87 Difference]: Start difference. First operand 6743 states and 18003 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:24,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:24,297 INFO L93 Difference]: Finished difference Result 7999 states and 20457 transitions. [2021-07-09 17:11:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:24,297 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:24,307 INFO L225 Difference]: With dead ends: 7999 [2021-07-09 17:11:24,307 INFO L226 Difference]: Without dead ends: 7961 [2021-07-09 17:11:24,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 102.9ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:24,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7961 states. [2021-07-09 17:11:24,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7961 to 6838. [2021-07-09 17:11:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.6676905075325434) internal successors, (18239), 6837 states have internal predecessors, (18239), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:24,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18239 transitions. [2021-07-09 17:11:24,397 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18239 transitions. Word has length 47 [2021-07-09 17:11:24,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:24,397 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18239 transitions. [2021-07-09 17:11:24,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:24,397 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18239 transitions. [2021-07-09 17:11:24,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:24,402 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:24,402 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:24,617 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable369,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:24,618 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:24,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:24,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1592196484, now seen corresponding path program 96 times [2021-07-09 17:11:24,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:24,618 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404996339] [2021-07-09 17:11:24,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:24,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:24,663 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:24,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404996339] [2021-07-09 17:11:24,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404996339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:24,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370548007] [2021-07-09 17:11:24,664 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:24,693 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:11:24,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:24,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:24,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 49 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:24,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370548007] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:24,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:24,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:11:24,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685159267] [2021-07-09 17:11:24,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:11:24,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:11:24,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:11:24,759 INFO L87 Difference]: Start difference. First operand 6838 states and 18239 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:24,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:24,907 INFO L93 Difference]: Finished difference Result 7980 states and 20237 transitions. [2021-07-09 17:11:24,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:11:24,907 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:24,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:24,922 INFO L225 Difference]: With dead ends: 7980 [2021-07-09 17:11:24,922 INFO L226 Difference]: Without dead ends: 7977 [2021-07-09 17:11:24,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 41.7ms TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:24,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7977 states. [2021-07-09 17:11:25,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7977 to 6818. [2021-07-09 17:11:25,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6818 states, 6817 states have (on average 2.664661874724952) internal successors, (18165), 6817 states have internal predecessors, (18165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:25,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6818 states to 6818 states and 18165 transitions. [2021-07-09 17:11:25,027 INFO L78 Accepts]: Start accepts. Automaton has 6818 states and 18165 transitions. Word has length 47 [2021-07-09 17:11:25,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:25,028 INFO L482 AbstractCegarLoop]: Abstraction has 6818 states and 18165 transitions. [2021-07-09 17:11:25,028 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:25,028 INFO L276 IsEmpty]: Start isEmpty. Operand 6818 states and 18165 transitions. [2021-07-09 17:11:25,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:25,033 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:25,033 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:25,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-07-09 17:11:25,249 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:25,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:25,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1385133918, now seen corresponding path program 97 times [2021-07-09 17:11:25,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:25,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841409433] [2021-07-09 17:11:25,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:25,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:25,300 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:25,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:25,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841409433] [2021-07-09 17:11:25,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841409433] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:25,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229686332] [2021-07-09 17:11:25,301 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:25,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 52 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:25,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229686332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:25,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:25,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:11:25,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144612137] [2021-07-09 17:11:25,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:25,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:25,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:25,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:25,389 INFO L87 Difference]: Start difference. First operand 6818 states and 18165 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:25,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:25,539 INFO L93 Difference]: Finished difference Result 7990 states and 20202 transitions. [2021-07-09 17:11:25,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:25,539 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:25,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:25,550 INFO L225 Difference]: With dead ends: 7990 [2021-07-09 17:11:25,550 INFO L226 Difference]: Without dead ends: 7972 [2021-07-09 17:11:25,550 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 61.7ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:25,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7972 states. [2021-07-09 17:11:25,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7972 to 6576. [2021-07-09 17:11:25,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 2.6518631178707226) internal successors, (17436), 6575 states have internal predecessors, (17436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:25,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17436 transitions. [2021-07-09 17:11:25,639 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17436 transitions. Word has length 47 [2021-07-09 17:11:25,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:25,640 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17436 transitions. [2021-07-09 17:11:25,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:25,640 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17436 transitions. [2021-07-09 17:11:25,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:25,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:25,645 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:25,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable372,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:25,860 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:25,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:25,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1461833365, now seen corresponding path program 98 times [2021-07-09 17:11:25,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:25,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331421227] [2021-07-09 17:11:25,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:25,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:25,924 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:25,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:25,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331421227] [2021-07-09 17:11:25,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331421227] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:25,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243890838] [2021-07-09 17:11:25,924 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:25,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:25,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:25,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:25,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:26,040 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:26,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243890838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:26,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:26,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:11:26,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752306974] [2021-07-09 17:11:26,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:26,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:26,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:26,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:26,041 INFO L87 Difference]: Start difference. First operand 6576 states and 17436 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:26,532 INFO L93 Difference]: Finished difference Result 7270 states and 18664 transitions. [2021-07-09 17:11:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:26,533 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:26,542 INFO L225 Difference]: With dead ends: 7270 [2021-07-09 17:11:26,543 INFO L226 Difference]: Without dead ends: 7232 [2021-07-09 17:11:26,543 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:26,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7232 states. [2021-07-09 17:11:26,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7232 to 6547. [2021-07-09 17:11:26,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6547 states, 6546 states have (on average 2.6515429269783075) internal successors, (17357), 6546 states have internal predecessors, (17357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6547 states to 6547 states and 17357 transitions. [2021-07-09 17:11:26,629 INFO L78 Accepts]: Start accepts. Automaton has 6547 states and 17357 transitions. Word has length 47 [2021-07-09 17:11:26,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:26,629 INFO L482 AbstractCegarLoop]: Abstraction has 6547 states and 17357 transitions. [2021-07-09 17:11:26,629 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:26,629 INFO L276 IsEmpty]: Start isEmpty. Operand 6547 states and 17357 transitions. [2021-07-09 17:11:26,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:26,634 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:26,634 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:26,849 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable375 [2021-07-09 17:11:26,849 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:26,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:26,849 INFO L82 PathProgramCache]: Analyzing trace with hash 848297185, now seen corresponding path program 99 times [2021-07-09 17:11:26,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:26,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107299303] [2021-07-09 17:11:26,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:26,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:26,918 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:26,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107299303] [2021-07-09 17:11:26,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107299303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:26,918 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188545589] [2021-07-09 17:11:26,918 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:26,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:11:26,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:26,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:26,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:27,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [188545589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:27,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:27,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:11:27,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126306500] [2021-07-09 17:11:27,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:27,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:27,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:27,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:27,012 INFO L87 Difference]: Start difference. First operand 6547 states and 17357 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) [2021-07-09 17:11:27,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:27,329 INFO L93 Difference]: Finished difference Result 7510 states and 19214 transitions. [2021-07-09 17:11:27,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:27,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:27,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:27,341 INFO L225 Difference]: With dead ends: 7510 [2021-07-09 17:11:27,341 INFO L226 Difference]: Without dead ends: 7498 [2021-07-09 17:11:27,341 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7498 states. [2021-07-09 17:11:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7498 to 6557. [2021-07-09 17:11:27,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6557 states, 6556 states have (on average 2.6505491153142158) internal successors, (17377), 6556 states have internal predecessors, (17377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:27,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6557 states to 6557 states and 17377 transitions. [2021-07-09 17:11:27,438 INFO L78 Accepts]: Start accepts. Automaton has 6557 states and 17377 transitions. Word has length 47 [2021-07-09 17:11:27,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:27,438 INFO L482 AbstractCegarLoop]: Abstraction has 6557 states and 17377 transitions. [2021-07-09 17:11:27,438 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) [2021-07-09 17:11:27,438 INFO L276 IsEmpty]: Start isEmpty. Operand 6557 states and 17377 transitions. [2021-07-09 17:11:27,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:27,444 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:27,444 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:27,659 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 191 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-07-09 17:11:27,659 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:27,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:27,660 INFO L82 PathProgramCache]: Analyzing trace with hash -1304752777, now seen corresponding path program 100 times [2021-07-09 17:11:27,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:27,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123451621] [2021-07-09 17:11:27,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:27,727 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:27,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:27,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123451621] [2021-07-09 17:11:27,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1123451621] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:27,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105322289] [2021-07-09 17:11:27,727 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:27,756 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:27,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:27,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:27,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:27,821 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:27,821 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105322289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:27,821 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:27,821 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:11:27,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397904596] [2021-07-09 17:11:27,822 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:27,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:27,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:27,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:27,822 INFO L87 Difference]: Start difference. First operand 6557 states and 17377 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:28,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:28,262 INFO L93 Difference]: Finished difference Result 8002 states and 20257 transitions. [2021-07-09 17:11:28,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:11:28,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:28,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:28,274 INFO L225 Difference]: With dead ends: 8002 [2021-07-09 17:11:28,274 INFO L226 Difference]: Without dead ends: 7990 [2021-07-09 17:11:28,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:28,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7990 states. [2021-07-09 17:11:28,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7990 to 6589. [2021-07-09 17:11:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6589 states, 6588 states have (on average 2.6495142683667274) internal successors, (17455), 6588 states have internal predecessors, (17455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:28,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6589 states to 6589 states and 17455 transitions. [2021-07-09 17:11:28,425 INFO L78 Accepts]: Start accepts. Automaton has 6589 states and 17455 transitions. Word has length 47 [2021-07-09 17:11:28,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:28,425 INFO L482 AbstractCegarLoop]: Abstraction has 6589 states and 17455 transitions. [2021-07-09 17:11:28,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:28,425 INFO L276 IsEmpty]: Start isEmpty. Operand 6589 states and 17455 transitions. [2021-07-09 17:11:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:28,432 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:28,432 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:28,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 192 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable377 [2021-07-09 17:11:28,649 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:28,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1542814294, now seen corresponding path program 42 times [2021-07-09 17:11:28,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:28,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269646926] [2021-07-09 17:11:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:28,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:28,698 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:28,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269646926] [2021-07-09 17:11:28,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269646926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:28,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505761120] [2021-07-09 17:11:28,698 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:28,737 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:11:28,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:28,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:28,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:28,849 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:28,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505761120] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:28,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:28,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 16 [2021-07-09 17:11:28,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858604219] [2021-07-09 17:11:28,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:11:28,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:28,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:11:28,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:11:28,850 INFO L87 Difference]: Start difference. First operand 6589 states and 17455 transitions. Second operand has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:29,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:29,122 INFO L93 Difference]: Finished difference Result 9290 states and 23114 transitions. [2021-07-09 17:11:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:11:29,122 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:29,135 INFO L225 Difference]: With dead ends: 9290 [2021-07-09 17:11:29,135 INFO L226 Difference]: Without dead ends: 9268 [2021-07-09 17:11:29,136 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 126.0ms TimeCoverageRelationStatistics Valid=175, Invalid=287, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:29,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9268 states. [2021-07-09 17:11:29,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9268 to 6764. [2021-07-09 17:11:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6764 states, 6763 states have (on average 2.6578441520035487) internal successors, (17975), 6763 states have internal predecessors, (17975), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:29,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6764 states to 6764 states and 17975 transitions. [2021-07-09 17:11:29,241 INFO L78 Accepts]: Start accepts. Automaton has 6764 states and 17975 transitions. Word has length 47 [2021-07-09 17:11:29,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:29,241 INFO L482 AbstractCegarLoop]: Abstraction has 6764 states and 17975 transitions. [2021-07-09 17:11:29,241 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.764705882352941) internal successors, (64), 16 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:29,241 INFO L276 IsEmpty]: Start isEmpty. Operand 6764 states and 17975 transitions. [2021-07-09 17:11:29,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:29,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:29,247 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:29,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-07-09 17:11:29,461 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:29,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2130272592, now seen corresponding path program 43 times [2021-07-09 17:11:29,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:29,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558227169] [2021-07-09 17:11:29,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:29,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:29,513 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:29,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:29,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558227169] [2021-07-09 17:11:29,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1558227169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:29,514 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394565939] [2021-07-09 17:11:29,514 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:29,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:29,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:29,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394565939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:29,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:29,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-09 17:11:29,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141437677] [2021-07-09 17:11:29,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:29,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:29,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:29,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:29,620 INFO L87 Difference]: Start difference. First operand 6764 states and 17975 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:29,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:29,774 INFO L93 Difference]: Finished difference Result 9757 states and 24151 transitions. [2021-07-09 17:11:29,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:29,774 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:29,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:29,787 INFO L225 Difference]: With dead ends: 9757 [2021-07-09 17:11:29,788 INFO L226 Difference]: Without dead ends: 9757 [2021-07-09 17:11:29,788 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 64.0ms TimeCoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:29,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9757 states. [2021-07-09 17:11:29,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9757 to 6769. [2021-07-09 17:11:29,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6769 states, 6768 states have (on average 2.6569148936170213) internal successors, (17982), 6768 states have internal predecessors, (17982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6769 states to 6769 states and 17982 transitions. [2021-07-09 17:11:29,895 INFO L78 Accepts]: Start accepts. Automaton has 6769 states and 17982 transitions. Word has length 47 [2021-07-09 17:11:29,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:29,895 INFO L482 AbstractCegarLoop]: Abstraction has 6769 states and 17982 transitions. [2021-07-09 17:11:29,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:29,895 INFO L276 IsEmpty]: Start isEmpty. Operand 6769 states and 17982 transitions. [2021-07-09 17:11:29,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:29,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:29,901 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:30,101 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable379,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:30,101 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:30,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:30,101 INFO L82 PathProgramCache]: Analyzing trace with hash 492700136, now seen corresponding path program 44 times [2021-07-09 17:11:30,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:30,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673003234] [2021-07-09 17:11:30,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:30,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:30,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:30,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673003234] [2021-07-09 17:11:30,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673003234] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:30,165 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574005028] [2021-07-09 17:11:30,165 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:30,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:30,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:30,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:30,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:30,261 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:30,262 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574005028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:30,262 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:30,262 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:11:30,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198448243] [2021-07-09 17:11:30,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:11:30,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:30,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:11:30,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:11:30,262 INFO L87 Difference]: Start difference. First operand 6769 states and 17982 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:30,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:30,457 INFO L93 Difference]: Finished difference Result 8996 states and 22443 transitions. [2021-07-09 17:11:30,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:30,457 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:30,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:30,469 INFO L225 Difference]: With dead ends: 8996 [2021-07-09 17:11:30,469 INFO L226 Difference]: Without dead ends: 8996 [2021-07-09 17:11:30,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 81.1ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:30,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8996 states. [2021-07-09 17:11:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8996 to 6596. [2021-07-09 17:11:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.650037907505686) internal successors, (17477), 6595 states have internal predecessors, (17477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:30,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17477 transitions. [2021-07-09 17:11:30,568 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17477 transitions. Word has length 47 [2021-07-09 17:11:30,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:30,568 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17477 transitions. [2021-07-09 17:11:30,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:30,568 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17477 transitions. [2021-07-09 17:11:30,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:30,573 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:30,573 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:30,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable380 [2021-07-09 17:11:30,789 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:30,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:30,789 INFO L82 PathProgramCache]: Analyzing trace with hash 227806332, now seen corresponding path program 101 times [2021-07-09 17:11:30,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:30,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442250785] [2021-07-09 17:11:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:30,846 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 44 proven. 54 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:30,847 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:30,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442250785] [2021-07-09 17:11:30,847 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442250785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:30,847 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877862237] [2021-07-09 17:11:30,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:30,872 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-07-09 17:11:30,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:30,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:30,962 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:30,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877862237] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:30,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:30,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-07-09 17:11:30,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667168744] [2021-07-09 17:11:30,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:11:30,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:30,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:11:30,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:11:30,962 INFO L87 Difference]: Start difference. First operand 6596 states and 17477 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:31,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:31,202 INFO L93 Difference]: Finished difference Result 7771 states and 19586 transitions. [2021-07-09 17:11:31,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:11:31,202 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:31,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:31,212 INFO L225 Difference]: With dead ends: 7771 [2021-07-09 17:11:31,213 INFO L226 Difference]: Without dead ends: 7753 [2021-07-09 17:11:31,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:11:31,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7753 states. [2021-07-09 17:11:31,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7753 to 6596. [2021-07-09 17:11:31,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6596 states, 6595 states have (on average 2.648521607278241) internal successors, (17467), 6595 states have internal predecessors, (17467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:31,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6596 states to 6596 states and 17467 transitions. [2021-07-09 17:11:31,304 INFO L78 Accepts]: Start accepts. Automaton has 6596 states and 17467 transitions. Word has length 47 [2021-07-09 17:11:31,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:31,304 INFO L482 AbstractCegarLoop]: Abstraction has 6596 states and 17467 transitions. [2021-07-09 17:11:31,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:31,304 INFO L276 IsEmpty]: Start isEmpty. Operand 6596 states and 17467 transitions. [2021-07-09 17:11:31,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:31,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:31,310 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:31,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable381,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:31,525 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:31,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:31,525 INFO L82 PathProgramCache]: Analyzing trace with hash -866264581, now seen corresponding path program 45 times [2021-07-09 17:11:31,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:31,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215831212] [2021-07-09 17:11:31,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:31,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:31,592 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:31,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:31,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215831212] [2021-07-09 17:11:31,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215831212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:31,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757793567] [2021-07-09 17:11:31,592 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:31,629 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:11:31,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:31,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:11:31,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:31,814 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:31,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1757793567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:31,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:31,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 21 [2021-07-09 17:11:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487694683] [2021-07-09 17:11:31,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:11:31,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:11:31,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:31,815 INFO L87 Difference]: Start difference. First operand 6596 states and 17467 transitions. Second operand has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:32,911 INFO L93 Difference]: Finished difference Result 8359 states and 20936 transitions. [2021-07-09 17:11:32,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-09 17:11:32,912 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:32,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:32,926 INFO L225 Difference]: With dead ends: 8359 [2021-07-09 17:11:32,926 INFO L226 Difference]: Without dead ends: 8301 [2021-07-09 17:11:32,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 340.8ms TimeCoverageRelationStatistics Valid=162, Invalid=1478, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:11:32,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8301 states. [2021-07-09 17:11:33,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8301 to 6703. [2021-07-09 17:11:33,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6703 states, 6702 states have (on average 2.645777379886601) internal successors, (17732), 6702 states have internal predecessors, (17732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6703 states to 6703 states and 17732 transitions. [2021-07-09 17:11:33,032 INFO L78 Accepts]: Start accepts. Automaton has 6703 states and 17732 transitions. Word has length 47 [2021-07-09 17:11:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:33,032 INFO L482 AbstractCegarLoop]: Abstraction has 6703 states and 17732 transitions. [2021-07-09 17:11:33,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.8636363636363638) internal successors, (85), 21 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6703 states and 17732 transitions. [2021-07-09 17:11:33,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:33,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:33,038 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:33,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable385 [2021-07-09 17:11:33,253 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:33,253 INFO L82 PathProgramCache]: Analyzing trace with hash 634068411, now seen corresponding path program 102 times [2021-07-09 17:11:33,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:33,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397612684] [2021-07-09 17:11:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:33,317 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:33,317 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:33,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397612684] [2021-07-09 17:11:33,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397612684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:33,318 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812375159] [2021-07-09 17:11:33,318 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:33,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:11:33,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:33,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:33,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:33,449 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:33,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1812375159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:33,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:33,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:11:33,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529763907] [2021-07-09 17:11:33,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:33,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:33,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:33,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:33,450 INFO L87 Difference]: Start difference. First operand 6703 states and 17732 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:33,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:33,933 INFO L93 Difference]: Finished difference Result 7388 states and 18942 transitions. [2021-07-09 17:11:33,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:33,933 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:33,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:33,943 INFO L225 Difference]: With dead ends: 7388 [2021-07-09 17:11:33,943 INFO L226 Difference]: Without dead ends: 7332 [2021-07-09 17:11:33,943 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 105.2ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7332 states. [2021-07-09 17:11:34,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7332 to 6671. [2021-07-09 17:11:34,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6671 states, 6670 states have (on average 2.643478260869565) internal successors, (17632), 6670 states have internal predecessors, (17632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:34,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6671 states to 6671 states and 17632 transitions. [2021-07-09 17:11:34,031 INFO L78 Accepts]: Start accepts. Automaton has 6671 states and 17632 transitions. Word has length 47 [2021-07-09 17:11:34,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:34,031 INFO L482 AbstractCegarLoop]: Abstraction has 6671 states and 17632 transitions. [2021-07-09 17:11:34,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:34,032 INFO L276 IsEmpty]: Start isEmpty. Operand 6671 states and 17632 transitions. [2021-07-09 17:11:34,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:34,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:34,037 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:34,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable386 [2021-07-09 17:11:34,252 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:34,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:34,252 INFO L82 PathProgramCache]: Analyzing trace with hash 20532231, now seen corresponding path program 103 times [2021-07-09 17:11:34,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:34,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310438194] [2021-07-09 17:11:34,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:34,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:34,322 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:34,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:34,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310438194] [2021-07-09 17:11:34,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310438194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:34,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430637158] [2021-07-09 17:11:34,323 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:34,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:34,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:34,414 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:34,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430637158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:34,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:34,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:11:34,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494060614] [2021-07-09 17:11:34,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:34,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:34,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:34,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:34,415 INFO L87 Difference]: Start difference. First operand 6671 states and 17632 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) [2021-07-09 17:11:34,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:34,781 INFO L93 Difference]: Finished difference Result 7705 states and 19640 transitions. [2021-07-09 17:11:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:34,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:34,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:34,792 INFO L225 Difference]: With dead ends: 7705 [2021-07-09 17:11:34,792 INFO L226 Difference]: Without dead ends: 7693 [2021-07-09 17:11:34,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 105.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7693 states. [2021-07-09 17:11:34,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7693 to 6695. [2021-07-09 17:11:34,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6695 states, 6694 states have (on average 2.642067523155064) internal successors, (17686), 6694 states have internal predecessors, (17686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:34,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6695 states to 6695 states and 17686 transitions. [2021-07-09 17:11:34,881 INFO L78 Accepts]: Start accepts. Automaton has 6695 states and 17686 transitions. Word has length 47 [2021-07-09 17:11:34,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:34,881 INFO L482 AbstractCegarLoop]: Abstraction has 6695 states and 17686 transitions. [2021-07-09 17:11:34,881 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) [2021-07-09 17:11:34,881 INFO L276 IsEmpty]: Start isEmpty. Operand 6695 states and 17686 transitions. [2021-07-09 17:11:34,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:34,886 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:34,887 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:35,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable387,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:35,102 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:35,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:35,102 INFO L82 PathProgramCache]: Analyzing trace with hash -136767256, now seen corresponding path program 46 times [2021-07-09 17:11:35,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:35,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054375164] [2021-07-09 17:11:35,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:35,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:35,151 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 58 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:35,152 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:35,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054375164] [2021-07-09 17:11:35,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054375164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:35,152 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516472802] [2021-07-09 17:11:35,152 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:35,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:35,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:35,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:35,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:35,247 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:35,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516472802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:35,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:35,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-09 17:11:35,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4896030] [2021-07-09 17:11:35,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:35,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:35,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:35,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:35,247 INFO L87 Difference]: Start difference. First operand 6695 states and 17686 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:35,443 INFO L93 Difference]: Finished difference Result 8625 states and 21596 transitions. [2021-07-09 17:11:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:35,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:35,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:35,457 INFO L225 Difference]: With dead ends: 8625 [2021-07-09 17:11:35,457 INFO L226 Difference]: Without dead ends: 8605 [2021-07-09 17:11:35,457 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:11:35,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8605 states. [2021-07-09 17:11:35,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8605 to 6862. [2021-07-09 17:11:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6862 states, 6861 states have (on average 2.6453869698294707) internal successors, (18150), 6861 states have internal predecessors, (18150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:35,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6862 states to 6862 states and 18150 transitions. [2021-07-09 17:11:35,569 INFO L78 Accepts]: Start accepts. Automaton has 6862 states and 18150 transitions. Word has length 47 [2021-07-09 17:11:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:35,569 INFO L482 AbstractCegarLoop]: Abstraction has 6862 states and 18150 transitions. [2021-07-09 17:11:35,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand 6862 states and 18150 transitions. [2021-07-09 17:11:35,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:35,574 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:35,574 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:35,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-07-09 17:11:35,790 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:35,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:35,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1627825272, now seen corresponding path program 104 times [2021-07-09 17:11:35,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:35,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243806466] [2021-07-09 17:11:35,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:35,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:35,840 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:35,840 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:35,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243806466] [2021-07-09 17:11:35,840 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243806466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:35,840 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768218799] [2021-07-09 17:11:35,840 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:35,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:35,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:35,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:35,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:35,929 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 33 proven. 63 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:35,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768218799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:35,930 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:35,930 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:11:35,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252602323] [2021-07-09 17:11:35,930 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:35,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:35,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:35,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:35,930 INFO L87 Difference]: Start difference. First operand 6862 states and 18150 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) [2021-07-09 17:11:36,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:36,080 INFO L93 Difference]: Finished difference Result 8135 states and 20382 transitions. [2021-07-09 17:11:36,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:36,080 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:36,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:36,093 INFO L225 Difference]: With dead ends: 8135 [2021-07-09 17:11:36,093 INFO L226 Difference]: Without dead ends: 8117 [2021-07-09 17:11:36,093 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 60.7ms TimeCoverageRelationStatistics Valid=57, Invalid=99, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:36,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8117 states. [2021-07-09 17:11:36,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8117 to 6838. [2021-07-09 17:11:36,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6838 states, 6837 states have (on average 2.640485593096387) internal successors, (18053), 6837 states have internal predecessors, (18053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6838 states to 6838 states and 18053 transitions. [2021-07-09 17:11:36,192 INFO L78 Accepts]: Start accepts. Automaton has 6838 states and 18053 transitions. Word has length 47 [2021-07-09 17:11:36,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:36,192 INFO L482 AbstractCegarLoop]: Abstraction has 6838 states and 18053 transitions. [2021-07-09 17:11:36,192 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) [2021-07-09 17:11:36,192 INFO L276 IsEmpty]: Start isEmpty. Operand 6838 states and 18053 transitions. [2021-07-09 17:11:36,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:36,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:36,198 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:36,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable391,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:36,414 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:36,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:36,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2132517731, now seen corresponding path program 105 times [2021-07-09 17:11:36,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:36,414 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125140417] [2021-07-09 17:11:36,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:36,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:36,481 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:36,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:36,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125140417] [2021-07-09 17:11:36,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125140417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:36,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474793677] [2021-07-09 17:11:36,481 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:36,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:11:36,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:36,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:36,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:36,576 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:36,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474793677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:36,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:36,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:11:36,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164512250] [2021-07-09 17:11:36,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:36,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:36,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:36,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:36,576 INFO L87 Difference]: Start difference. First operand 6838 states and 18053 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:37,077 INFO L93 Difference]: Finished difference Result 8679 states and 21810 transitions. [2021-07-09 17:11:37,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:11:37,077 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:37,088 INFO L225 Difference]: With dead ends: 8679 [2021-07-09 17:11:37,088 INFO L226 Difference]: Without dead ends: 8637 [2021-07-09 17:11:37,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 154.5ms TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:37,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8637 states. [2021-07-09 17:11:37,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8637 to 6900. [2021-07-09 17:11:37,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6900 states, 6899 states have (on average 2.6408175097840267) internal successors, (18219), 6899 states have internal predecessors, (18219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:37,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6900 states to 6900 states and 18219 transitions. [2021-07-09 17:11:37,183 INFO L78 Accepts]: Start accepts. Automaton has 6900 states and 18219 transitions. Word has length 47 [2021-07-09 17:11:37,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:37,183 INFO L482 AbstractCegarLoop]: Abstraction has 6900 states and 18219 transitions. [2021-07-09 17:11:37,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:37,184 INFO L276 IsEmpty]: Start isEmpty. Operand 6900 states and 18219 transitions. [2021-07-09 17:11:37,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:37,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:37,189 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:37,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:37,405 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:37,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:37,405 INFO L82 PathProgramCache]: Analyzing trace with hash -599958622, now seen corresponding path program 106 times [2021-07-09 17:11:37,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:37,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916332431] [2021-07-09 17:11:37,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:37,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:37,462 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:37,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916332431] [2021-07-09 17:11:37,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916332431] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:37,462 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630246472] [2021-07-09 17:11:37,462 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:37,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:37,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:37,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:37,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:37,552 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:37,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630246472] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:37,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:37,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:11:37,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370330918] [2021-07-09 17:11:37,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:37,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:37,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:37,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:37,553 INFO L87 Difference]: Start difference. First operand 6900 states and 18219 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:37,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:37,713 INFO L93 Difference]: Finished difference Result 8193 states and 20486 transitions. [2021-07-09 17:11:37,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:37,713 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:37,727 INFO L225 Difference]: With dead ends: 8193 [2021-07-09 17:11:37,727 INFO L226 Difference]: Without dead ends: 8169 [2021-07-09 17:11:37,727 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:11:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8169 states. [2021-07-09 17:11:37,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8169 to 6661. [2021-07-09 17:11:37,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6661 states, 6660 states have (on average 2.6294294294294294) internal successors, (17512), 6660 states have internal predecessors, (17512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:37,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6661 states to 6661 states and 17512 transitions. [2021-07-09 17:11:37,826 INFO L78 Accepts]: Start accepts. Automaton has 6661 states and 17512 transitions. Word has length 47 [2021-07-09 17:11:37,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:37,826 INFO L482 AbstractCegarLoop]: Abstraction has 6661 states and 17512 transitions. [2021-07-09 17:11:37,826 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:37,826 INFO L276 IsEmpty]: Start isEmpty. Operand 6661 states and 17512 transitions. [2021-07-09 17:11:37,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:37,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:37,832 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:38,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable395,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:38,049 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:38,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:38,049 INFO L82 PathProgramCache]: Analyzing trace with hash -1977681197, now seen corresponding path program 107 times [2021-07-09 17:11:38,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:38,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070664700] [2021-07-09 17:11:38,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:38,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:38,124 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:38,124 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:38,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070664700] [2021-07-09 17:11:38,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070664700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:38,124 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391098085] [2021-07-09 17:11:38,124 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:38,151 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:11:38,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:38,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:38,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:38,211 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:38,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391098085] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:38,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:38,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:11:38,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792719600] [2021-07-09 17:11:38,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:11:38,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:38,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:11:38,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:11:38,212 INFO L87 Difference]: Start difference. First operand 6661 states and 17512 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:38,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:38,626 INFO L93 Difference]: Finished difference Result 8662 states and 21553 transitions. [2021-07-09 17:11:38,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:11:38,627 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:38,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:38,640 INFO L225 Difference]: With dead ends: 8662 [2021-07-09 17:11:38,640 INFO L226 Difference]: Without dead ends: 8608 [2021-07-09 17:11:38,640 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 154.4ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:11:38,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8608 states. [2021-07-09 17:11:38,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8608 to 6632. [2021-07-09 17:11:38,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6632 states, 6631 states have (on average 2.625546674709697) internal successors, (17410), 6631 states have internal predecessors, (17410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:38,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6632 states to 6632 states and 17410 transitions. [2021-07-09 17:11:38,770 INFO L78 Accepts]: Start accepts. Automaton has 6632 states and 17410 transitions. Word has length 47 [2021-07-09 17:11:38,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:38,770 INFO L482 AbstractCegarLoop]: Abstraction has 6632 states and 17410 transitions. [2021-07-09 17:11:38,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:38,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6632 states and 17410 transitions. [2021-07-09 17:11:38,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:38,779 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:38,779 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:38,993 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable399 [2021-07-09 17:11:38,993 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:38,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:38,993 INFO L82 PathProgramCache]: Analyzing trace with hash 1457344172, now seen corresponding path program 47 times [2021-07-09 17:11:38,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:38,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710617676] [2021-07-09 17:11:38,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:38,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:39,046 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 73 proven. 24 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:39,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:39,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710617676] [2021-07-09 17:11:39,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710617676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:39,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463763049] [2021-07-09 17:11:39,046 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:39,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:11:39,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:39,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:39,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:39,203 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:39,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463763049] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:39,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:39,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 15] total 17 [2021-07-09 17:11:39,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680783163] [2021-07-09 17:11:39,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:11:39,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:11:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:11:39,203 INFO L87 Difference]: Start difference. First operand 6632 states and 17410 transitions. Second operand has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:39,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:39,517 INFO L93 Difference]: Finished difference Result 10971 states and 26933 transitions. [2021-07-09 17:11:39,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:11:39,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:39,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:39,532 INFO L225 Difference]: With dead ends: 10971 [2021-07-09 17:11:39,532 INFO L226 Difference]: Without dead ends: 10971 [2021-07-09 17:11:39,532 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 177.9ms TimeCoverageRelationStatistics Valid=221, Invalid=331, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:11:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10971 states. [2021-07-09 17:11:39,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10971 to 6822. [2021-07-09 17:11:39,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.637443190148072) internal successors, (17990), 6821 states have internal predecessors, (17990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:39,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17990 transitions. [2021-07-09 17:11:39,743 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17990 transitions. Word has length 47 [2021-07-09 17:11:39,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:39,743 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17990 transitions. [2021-07-09 17:11:39,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.6666666666666665) internal successors, (66), 17 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:39,743 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17990 transitions. [2021-07-09 17:11:39,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:39,749 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:39,749 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:39,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable400,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:39,953 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:39,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:39,954 INFO L82 PathProgramCache]: Analyzing trace with hash -180228284, now seen corresponding path program 48 times [2021-07-09 17:11:39,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:39,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502333834] [2021-07-09 17:11:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:39,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:40,008 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:40,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:40,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502333834] [2021-07-09 17:11:40,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502333834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:40,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029414470] [2021-07-09 17:11:40,009 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:40,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:11:40,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:40,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:40,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:40,100 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:40,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029414470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:40,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:40,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:11:40,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018748946] [2021-07-09 17:11:40,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:11:40,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:40,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:11:40,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:11:40,101 INFO L87 Difference]: Start difference. First operand 6822 states and 17990 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:40,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:40,336 INFO L93 Difference]: Finished difference Result 10273 states and 25277 transitions. [2021-07-09 17:11:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:11:40,336 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:40,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:40,354 INFO L225 Difference]: With dead ends: 10273 [2021-07-09 17:11:40,354 INFO L226 Difference]: Without dead ends: 10273 [2021-07-09 17:11:40,354 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:11:40,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10273 states. [2021-07-09 17:11:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10273 to 6822. [2021-07-09 17:11:40,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6822 states, 6821 states have (on average 2.6365635537311243) internal successors, (17984), 6821 states have internal predecessors, (17984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:40,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6822 states to 6822 states and 17984 transitions. [2021-07-09 17:11:40,493 INFO L78 Accepts]: Start accepts. Automaton has 6822 states and 17984 transitions. Word has length 47 [2021-07-09 17:11:40,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:40,493 INFO L482 AbstractCegarLoop]: Abstraction has 6822 states and 17984 transitions. [2021-07-09 17:11:40,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:40,493 INFO L276 IsEmpty]: Start isEmpty. Operand 6822 states and 17984 transitions. [2021-07-09 17:11:40,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:40,500 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:40,500 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:40,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable401,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:40,716 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:40,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1870223448, now seen corresponding path program 49 times [2021-07-09 17:11:40,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:40,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953679131] [2021-07-09 17:11:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:40,782 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 61 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:40,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:40,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953679131] [2021-07-09 17:11:40,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953679131] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:40,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508348467] [2021-07-09 17:11:40,782 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:40,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:40,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:40,871 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508348467] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:40,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:40,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:11:40,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642177626] [2021-07-09 17:11:40,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:11:40,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:40,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:11:40,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:40,872 INFO L87 Difference]: Start difference. First operand 6822 states and 17984 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:41,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:41,091 INFO L93 Difference]: Finished difference Result 8962 states and 22325 transitions. [2021-07-09 17:11:41,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:11:41,091 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:41,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:41,107 INFO L225 Difference]: With dead ends: 8962 [2021-07-09 17:11:41,107 INFO L226 Difference]: Without dead ends: 8962 [2021-07-09 17:11:41,107 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 99.5ms TimeCoverageRelationStatistics Valid=116, Invalid=190, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:11:41,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8962 states. [2021-07-09 17:11:41,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8962 to 6635. [2021-07-09 17:11:41,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.635061802833886) internal successors, (17481), 6634 states have internal predecessors, (17481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:41,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17481 transitions. [2021-07-09 17:11:41,235 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17481 transitions. Word has length 47 [2021-07-09 17:11:41,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:41,235 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17481 transitions. [2021-07-09 17:11:41,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:41,236 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17481 transitions. [2021-07-09 17:11:41,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:41,242 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:41,242 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:41,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-07-09 17:11:41,459 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:41,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:41,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1591078520, now seen corresponding path program 108 times [2021-07-09 17:11:41,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:41,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75517471] [2021-07-09 17:11:41,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:41,523 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:41,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:41,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75517471] [2021-07-09 17:11:41,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75517471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:41,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334819549] [2021-07-09 17:11:41,523 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:41,549 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:11:41,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:41,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:41,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:41,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334819549] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:41,639 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:41,639 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:11:41,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039958306] [2021-07-09 17:11:41,639 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:11:41,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:41,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:11:41,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:11:41,639 INFO L87 Difference]: Start difference. First operand 6635 states and 17481 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:41,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:41,851 INFO L93 Difference]: Finished difference Result 7750 states and 19446 transitions. [2021-07-09 17:11:41,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:41,851 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:41,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:41,860 INFO L225 Difference]: With dead ends: 7750 [2021-07-09 17:11:41,861 INFO L226 Difference]: Without dead ends: 7723 [2021-07-09 17:11:41,861 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:11:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7723 states. [2021-07-09 17:11:41,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7723 to 6635. [2021-07-09 17:11:41,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.6341573711184805) internal successors, (17475), 6634 states have internal predecessors, (17475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:41,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17475 transitions. [2021-07-09 17:11:41,947 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17475 transitions. Word has length 47 [2021-07-09 17:11:41,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:41,947 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17475 transitions. [2021-07-09 17:11:41,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:41,947 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17475 transitions. [2021-07-09 17:11:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:41,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:41,954 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:42,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable403,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:42,169 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:42,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:42,169 INFO L82 PathProgramCache]: Analyzing trace with hash 890204437, now seen corresponding path program 50 times [2021-07-09 17:11:42,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:42,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197326524] [2021-07-09 17:11:42,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:42,237 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:42,237 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:42,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197326524] [2021-07-09 17:11:42,237 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197326524] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:42,237 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038421884] [2021-07-09 17:11:42,237 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:42,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:42,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:42,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:42,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:42,330 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:42,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038421884] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:42,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:42,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:11:42,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236114089] [2021-07-09 17:11:42,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:42,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:42,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:42,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:42,331 INFO L87 Difference]: Start difference. First operand 6635 states and 17475 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:42,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:42,686 INFO L93 Difference]: Finished difference Result 7795 states and 19769 transitions. [2021-07-09 17:11:42,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:42,686 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:42,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:42,696 INFO L225 Difference]: With dead ends: 7795 [2021-07-09 17:11:42,696 INFO L226 Difference]: Without dead ends: 7771 [2021-07-09 17:11:42,696 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:42,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7771 states. [2021-07-09 17:11:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7771 to 6763. [2021-07-09 17:11:42,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6763 states, 6762 states have (on average 2.6302868973676428) internal successors, (17786), 6762 states have internal predecessors, (17786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:42,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6763 states to 6763 states and 17786 transitions. [2021-07-09 17:11:42,785 INFO L78 Accepts]: Start accepts. Automaton has 6763 states and 17786 transitions. Word has length 47 [2021-07-09 17:11:42,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:42,785 INFO L482 AbstractCegarLoop]: Abstraction has 6763 states and 17786 transitions. [2021-07-09 17:11:42,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:42,785 INFO L276 IsEmpty]: Start isEmpty. Operand 6763 states and 17786 transitions. [2021-07-09 17:11:42,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:42,791 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:42,791 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:43,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-07-09 17:11:43,006 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:43,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:43,006 INFO L82 PathProgramCache]: Analyzing trace with hash -663492420, now seen corresponding path program 109 times [2021-07-09 17:11:43,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:43,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842286285] [2021-07-09 17:11:43,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:43,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:43,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842286285] [2021-07-09 17:11:43,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842286285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:43,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445038372] [2021-07-09 17:11:43,047 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:43,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:43,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:43,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:43,129 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 57 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:43,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445038372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:43,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:43,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:11:43,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687137502] [2021-07-09 17:11:43,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:11:43,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:43,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:11:43,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:11:43,130 INFO L87 Difference]: Start difference. First operand 6763 states and 17786 transitions. Second operand has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:43,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:43,268 INFO L93 Difference]: Finished difference Result 8122 states and 20221 transitions. [2021-07-09 17:11:43,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:11:43,268 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:43,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:43,283 INFO L225 Difference]: With dead ends: 8122 [2021-07-09 17:11:43,284 INFO L226 Difference]: Without dead ends: 8119 [2021-07-09 17:11:43,284 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 38.5ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:43,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8119 states. [2021-07-09 17:11:43,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8119 to 6755. [2021-07-09 17:11:43,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.628368374296713) internal successors, (17752), 6754 states have internal predecessors, (17752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17752 transitions. [2021-07-09 17:11:43,419 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17752 transitions. Word has length 47 [2021-07-09 17:11:43,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:43,419 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17752 transitions. [2021-07-09 17:11:43,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.777777777777778) internal successors, (43), 8 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17752 transitions. [2021-07-09 17:11:43,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:43,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:43,427 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:43,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable409,210 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:43,631 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:43,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:43,631 INFO L82 PathProgramCache]: Analyzing trace with hash -456429854, now seen corresponding path program 110 times [2021-07-09 17:11:43,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:43,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543696188] [2021-07-09 17:11:43,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:43,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:43,685 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:43,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:43,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543696188] [2021-07-09 17:11:43,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543696188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:43,686 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670447324] [2021-07-09 17:11:43,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:43,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:43,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:43,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 62 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:43,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670447324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:43,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:43,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:11:43,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405332] [2021-07-09 17:11:43,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:43,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:43,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:43,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:43,777 INFO L87 Difference]: Start difference. First operand 6755 states and 17752 transitions. Second operand has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:43,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:43,941 INFO L93 Difference]: Finished difference Result 8150 states and 20236 transitions. [2021-07-09 17:11:43,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:43,942 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:43,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:43,952 INFO L225 Difference]: With dead ends: 8150 [2021-07-09 17:11:43,952 INFO L226 Difference]: Without dead ends: 8132 [2021-07-09 17:11:43,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 65.2ms TimeCoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:43,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8132 states. [2021-07-09 17:11:44,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8132 to 6755. [2021-07-09 17:11:44,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6755 states, 6754 states have (on average 2.6254071661237783) internal successors, (17732), 6754 states have internal predecessors, (17732), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:44,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6755 states to 6755 states and 17732 transitions. [2021-07-09 17:11:44,051 INFO L78 Accepts]: Start accepts. Automaton has 6755 states and 17732 transitions. Word has length 47 [2021-07-09 17:11:44,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:44,051 INFO L482 AbstractCegarLoop]: Abstraction has 6755 states and 17732 transitions. [2021-07-09 17:11:44,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:44,051 INFO L276 IsEmpty]: Start isEmpty. Operand 6755 states and 17732 transitions. [2021-07-09 17:11:44,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:44,056 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:44,056 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:44,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 211 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable411 [2021-07-09 17:11:44,272 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:44,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:44,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1904429867, now seen corresponding path program 111 times [2021-07-09 17:11:44,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:44,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338905215] [2021-07-09 17:11:44,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:44,335 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:44,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:44,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338905215] [2021-07-09 17:11:44,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338905215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:44,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1725102134] [2021-07-09 17:11:44,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:44,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 17:11:44,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:44,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:44,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:44,442 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:44,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1725102134] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:44,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:44,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:11:44,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718135475] [2021-07-09 17:11:44,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:44,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:44,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:44,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:44,443 INFO L87 Difference]: Start difference. First operand 6755 states and 17732 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:44,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:44,934 INFO L93 Difference]: Finished difference Result 7412 states and 18888 transitions. [2021-07-09 17:11:44,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:44,934 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:44,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:44,944 INFO L225 Difference]: With dead ends: 7412 [2021-07-09 17:11:44,944 INFO L226 Difference]: Without dead ends: 7338 [2021-07-09 17:11:44,944 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 105.8ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:44,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7338 states. [2021-07-09 17:11:45,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7338 to 6729. [2021-07-09 17:11:45,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6729 states, 6728 states have (on average 2.6211355529131986) internal successors, (17635), 6728 states have internal predecessors, (17635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:45,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17635 transitions. [2021-07-09 17:11:45,035 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17635 transitions. Word has length 47 [2021-07-09 17:11:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:45,035 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17635 transitions. [2021-07-09 17:11:45,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17635 transitions. [2021-07-09 17:11:45,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:45,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:45,041 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:45,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable414 [2021-07-09 17:11:45,256 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:45,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:45,256 INFO L82 PathProgramCache]: Analyzing trace with hash 1777001249, now seen corresponding path program 112 times [2021-07-09 17:11:45,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:45,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130616077] [2021-07-09 17:11:45,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:45,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:45,326 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:45,326 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:45,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130616077] [2021-07-09 17:11:45,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130616077] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:45,326 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699376230] [2021-07-09 17:11:45,326 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:45,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:45,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:45,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:45,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:45,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699376230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:45,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:45,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:11:45,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119649998] [2021-07-09 17:11:45,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:45,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:45,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:45,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:45,419 INFO L87 Difference]: Start difference. First operand 6729 states and 17635 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) [2021-07-09 17:11:45,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:45,756 INFO L93 Difference]: Finished difference Result 7761 states and 19651 transitions. [2021-07-09 17:11:45,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:45,757 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:45,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:45,767 INFO L225 Difference]: With dead ends: 7761 [2021-07-09 17:11:45,767 INFO L226 Difference]: Without dead ends: 7749 [2021-07-09 17:11:45,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:45,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7749 states. [2021-07-09 17:11:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7749 to 6765. [2021-07-09 17:11:45,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6765 states, 6764 states have (on average 2.6197516262566527) internal successors, (17720), 6764 states have internal predecessors, (17720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:45,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6765 states to 6765 states and 17720 transitions. [2021-07-09 17:11:45,856 INFO L78 Accepts]: Start accepts. Automaton has 6765 states and 17720 transitions. Word has length 47 [2021-07-09 17:11:45,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:45,856 INFO L482 AbstractCegarLoop]: Abstraction has 6765 states and 17720 transitions. [2021-07-09 17:11:45,857 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) [2021-07-09 17:11:45,857 INFO L276 IsEmpty]: Start isEmpty. Operand 6765 states and 17720 transitions. [2021-07-09 17:11:45,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:45,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:45,862 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:46,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable415,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:46,077 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:46,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:46,077 INFO L82 PathProgramCache]: Analyzing trace with hash -376048713, now seen corresponding path program 113 times [2021-07-09 17:11:46,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:46,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943405568] [2021-07-09 17:11:46,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:46,144 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:46,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1943405568] [2021-07-09 17:11:46,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1943405568] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:46,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931764226] [2021-07-09 17:11:46,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:46,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 17:11:46,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:46,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:46,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:46,239 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:46,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931764226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:46,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:46,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:11:46,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118876302] [2021-07-09 17:11:46,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:46,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:46,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:46,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:46,240 INFO L87 Difference]: Start difference. First operand 6765 states and 17720 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:46,698 INFO L93 Difference]: Finished difference Result 8961 states and 22249 transitions. [2021-07-09 17:11:46,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:11:46,698 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:46,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:46,709 INFO L225 Difference]: With dead ends: 8961 [2021-07-09 17:11:46,709 INFO L226 Difference]: Without dead ends: 8907 [2021-07-09 17:11:46,710 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 166.7ms TimeCoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:11:46,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8907 states. [2021-07-09 17:11:46,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8907 to 6885. [2021-07-09 17:11:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 6884 states have (on average 2.6198431144683325) internal successors, (18035), 6884 states have internal predecessors, (18035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:46,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18035 transitions. [2021-07-09 17:11:46,839 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18035 transitions. Word has length 47 [2021-07-09 17:11:46,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:46,839 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18035 transitions. [2021-07-09 17:11:46,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:46,839 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18035 transitions. [2021-07-09 17:11:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:46,847 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:46,847 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:47,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:47,064 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:47,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:47,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1156510396, now seen corresponding path program 114 times [2021-07-09 17:11:47,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:47,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009617580] [2021-07-09 17:11:47,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:47,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:47,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009617580] [2021-07-09 17:11:47,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009617580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:47,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662158748] [2021-07-09 17:11:47,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:47,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:11:47,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:47,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:47,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:47,213 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 27 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:47,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662158748] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:47,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:47,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:11:47,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263047780] [2021-07-09 17:11:47,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:47,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:47,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:47,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:47,214 INFO L87 Difference]: Start difference. First operand 6885 states and 18035 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:47,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:47,363 INFO L93 Difference]: Finished difference Result 8306 states and 20557 transitions. [2021-07-09 17:11:47,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:47,363 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:47,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:47,373 INFO L225 Difference]: With dead ends: 8306 [2021-07-09 17:11:47,373 INFO L226 Difference]: Without dead ends: 8282 [2021-07-09 17:11:47,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:11:47,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8282 states. [2021-07-09 17:11:47,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8282 to 6885. [2021-07-09 17:11:47,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6885 states, 6884 states have (on average 2.6178094131319) internal successors, (18021), 6884 states have internal predecessors, (18021), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:47,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6885 states to 6885 states and 18021 transitions. [2021-07-09 17:11:47,464 INFO L78 Accepts]: Start accepts. Automaton has 6885 states and 18021 transitions. Word has length 47 [2021-07-09 17:11:47,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:47,464 INFO L482 AbstractCegarLoop]: Abstraction has 6885 states and 18021 transitions. [2021-07-09 17:11:47,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:47,465 INFO L276 IsEmpty]: Start isEmpty. Operand 6885 states and 18021 transitions. [2021-07-09 17:11:47,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:47,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:47,470 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:47,685 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:47,685 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash -221212179, now seen corresponding path program 115 times [2021-07-09 17:11:47,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:47,686 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521446722] [2021-07-09 17:11:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:47,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:47,760 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:47,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:47,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521446722] [2021-07-09 17:11:47,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521446722] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:47,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135173449] [2021-07-09 17:11:47,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:47,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:47,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:47,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135173449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:47,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:47,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:11:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391888422] [2021-07-09 17:11:47,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:11:47,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:47,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:11:47,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:11:47,852 INFO L87 Difference]: Start difference. First operand 6885 states and 18021 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:48,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:48,512 INFO L93 Difference]: Finished difference Result 10707 states and 26088 transitions. [2021-07-09 17:11:48,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:11:48,512 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:48,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:48,526 INFO L225 Difference]: With dead ends: 10707 [2021-07-09 17:11:48,526 INFO L226 Difference]: Without dead ends: 10593 [2021-07-09 17:11:48,527 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 301.5ms TimeCoverageRelationStatistics Valid=171, Invalid=1019, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:11:48,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10593 states. [2021-07-09 17:11:48,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10593 to 7009. [2021-07-09 17:11:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7009 states, 7008 states have (on average 2.617865296803653) internal successors, (18346), 7008 states have internal predecessors, (18346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:48,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7009 states to 7009 states and 18346 transitions. [2021-07-09 17:11:48,646 INFO L78 Accepts]: Start accepts. Automaton has 7009 states and 18346 transitions. Word has length 47 [2021-07-09 17:11:48,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:48,646 INFO L482 AbstractCegarLoop]: Abstraction has 7009 states and 18346 transitions. [2021-07-09 17:11:48,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:48,646 INFO L276 IsEmpty]: Start isEmpty. Operand 7009 states and 18346 transitions. [2021-07-09 17:11:48,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:48,652 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:48,652 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:48,867 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-07-09 17:11:48,867 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:48,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:48,868 INFO L82 PathProgramCache]: Analyzing trace with hash 165390498, now seen corresponding path program 116 times [2021-07-09 17:11:48,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:48,868 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073370291] [2021-07-09 17:11:48,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:48,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:48,938 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:48,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:48,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073370291] [2021-07-09 17:11:48,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1073370291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:48,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535264629] [2021-07-09 17:11:48,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:48,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:48,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:48,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:48,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:49,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535264629] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:49,037 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:49,037 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:11:49,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789914298] [2021-07-09 17:11:49,037 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:11:49,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:49,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:11:49,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:11:49,037 INFO L87 Difference]: Start difference. First operand 7009 states and 18346 transitions. Second operand has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:49,200 INFO L93 Difference]: Finished difference Result 8467 states and 20934 transitions. [2021-07-09 17:11:49,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:49,200 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:49,211 INFO L225 Difference]: With dead ends: 8467 [2021-07-09 17:11:49,211 INFO L226 Difference]: Without dead ends: 8434 [2021-07-09 17:11:49,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 91.1ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:11:49,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8434 states. [2021-07-09 17:11:49,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8434 to 6781. [2021-07-09 17:11:49,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6781 states, 6780 states have (on average 2.6073746312684367) internal successors, (17678), 6780 states have internal predecessors, (17678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6781 states to 6781 states and 17678 transitions. [2021-07-09 17:11:49,306 INFO L78 Accepts]: Start accepts. Automaton has 6781 states and 17678 transitions. Word has length 47 [2021-07-09 17:11:49,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:49,307 INFO L482 AbstractCegarLoop]: Abstraction has 6781 states and 17678 transitions. [2021-07-09 17:11:49,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.8333333333333335) internal successors, (46), 11 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:49,307 INFO L276 IsEmpty]: Start isEmpty. Operand 6781 states and 17678 transitions. [2021-07-09 17:11:49,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:49,312 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:49,312 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:49,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable422 [2021-07-09 17:11:49,528 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:49,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:49,528 INFO L82 PathProgramCache]: Analyzing trace with hash -280903689, now seen corresponding path program 117 times [2021-07-09 17:11:49,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:49,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715277214] [2021-07-09 17:11:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:49,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:49,613 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:49,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:49,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715277214] [2021-07-09 17:11:49,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715277214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:49,614 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530835028] [2021-07-09 17:11:49,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:49,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 17:11:49,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:49,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:49,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:49,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530835028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:49,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:49,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:11:49,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133199283] [2021-07-09 17:11:49,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:11:49,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:49,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:11:49,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:49,712 INFO L87 Difference]: Start difference. First operand 6781 states and 17678 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:50,259 INFO L93 Difference]: Finished difference Result 9528 states and 23213 transitions. [2021-07-09 17:11:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:11:50,260 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:50,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:50,273 INFO L225 Difference]: With dead ends: 9528 [2021-07-09 17:11:50,273 INFO L226 Difference]: Without dead ends: 9372 [2021-07-09 17:11:50,274 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:11:50,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9372 states. [2021-07-09 17:11:50,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9372 to 6516. [2021-07-09 17:11:50,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6516 states, 6515 states have (on average 2.6015349194167308) internal successors, (16949), 6515 states have internal predecessors, (16949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6516 states to 6516 states and 16949 transitions. [2021-07-09 17:11:50,387 INFO L78 Accepts]: Start accepts. Automaton has 6516 states and 16949 transitions. Word has length 47 [2021-07-09 17:11:50,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:50,387 INFO L482 AbstractCegarLoop]: Abstraction has 6516 states and 16949 transitions. [2021-07-09 17:11:50,387 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:50,387 INFO L276 IsEmpty]: Start isEmpty. Operand 6516 states and 16949 transitions. [2021-07-09 17:11:50,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:50,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:50,393 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:50,611 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable427,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:50,611 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:50,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:50,611 INFO L82 PathProgramCache]: Analyzing trace with hash -518965206, now seen corresponding path program 51 times [2021-07-09 17:11:50,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:50,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871457394] [2021-07-09 17:11:50,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:50,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:50,662 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:50,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:50,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871457394] [2021-07-09 17:11:50,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871457394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:50,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839440216] [2021-07-09 17:11:50,662 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:50,691 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:11:50,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:50,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:50,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:50,760 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:50,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839440216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:50,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:50,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-09 17:11:50,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133176543] [2021-07-09 17:11:50,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:50,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:50,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:50,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:50,761 INFO L87 Difference]: Start difference. First operand 6516 states and 16949 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:50,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:50,947 INFO L93 Difference]: Finished difference Result 8372 states and 20874 transitions. [2021-07-09 17:11:50,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:50,947 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:50,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:50,958 INFO L225 Difference]: With dead ends: 8372 [2021-07-09 17:11:50,958 INFO L226 Difference]: Without dead ends: 8356 [2021-07-09 17:11:50,958 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-07-09 17:11:51,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 6760. [2021-07-09 17:11:51,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6760 states, 6759 states have (on average 2.6057109039798787) internal successors, (17612), 6759 states have internal predecessors, (17612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:51,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6760 states to 6760 states and 17612 transitions. [2021-07-09 17:11:51,131 INFO L78 Accepts]: Start accepts. Automaton has 6760 states and 17612 transitions. Word has length 47 [2021-07-09 17:11:51,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:51,131 INFO L482 AbstractCegarLoop]: Abstraction has 6760 states and 17612 transitions. [2021-07-09 17:11:51,131 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:51,132 INFO L276 IsEmpty]: Start isEmpty. Operand 6760 states and 17612 transitions. [2021-07-09 17:11:51,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:51,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:51,137 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:51,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable428 [2021-07-09 17:11:51,352 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:51,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1140845616, now seen corresponding path program 52 times [2021-07-09 17:11:51,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:51,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675062874] [2021-07-09 17:11:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:51,408 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 77 proven. 20 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:51,408 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:51,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675062874] [2021-07-09 17:11:51,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675062874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:51,408 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097963770] [2021-07-09 17:11:51,408 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:51,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:51,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:51,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:51,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:51,506 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:51,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097963770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:51,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:51,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-09 17:11:51,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402773289] [2021-07-09 17:11:51,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:51,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:51,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:51,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:51,507 INFO L87 Difference]: Start difference. First operand 6760 states and 17612 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:51,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:51,714 INFO L93 Difference]: Finished difference Result 10200 states and 25050 transitions. [2021-07-09 17:11:51,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:11:51,714 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:51,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:51,731 INFO L225 Difference]: With dead ends: 10200 [2021-07-09 17:11:51,731 INFO L226 Difference]: Without dead ends: 10200 [2021-07-09 17:11:51,732 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=89, Invalid=121, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10200 states. [2021-07-09 17:11:51,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10200 to 6771. [2021-07-09 17:11:51,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6771 states, 6770 states have (on average 2.606351550960118) internal successors, (17645), 6770 states have internal predecessors, (17645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:51,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6771 states to 6771 states and 17645 transitions. [2021-07-09 17:11:51,892 INFO L78 Accepts]: Start accepts. Automaton has 6771 states and 17645 transitions. Word has length 47 [2021-07-09 17:11:51,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:51,892 INFO L482 AbstractCegarLoop]: Abstraction has 6771 states and 17645 transitions. [2021-07-09 17:11:51,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:51,893 INFO L276 IsEmpty]: Start isEmpty. Operand 6771 states and 17645 transitions. [2021-07-09 17:11:51,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:51,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:51,901 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:52,126 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-07-09 17:11:52,126 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:52,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:52,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1516549224, now seen corresponding path program 53 times [2021-07-09 17:11:52,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:52,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152066897] [2021-07-09 17:11:52,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:52,183 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:52,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:52,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152066897] [2021-07-09 17:11:52,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152066897] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:52,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933775567] [2021-07-09 17:11:52,184 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:52,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:11:52,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:52,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 78 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:52,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [933775567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:52,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:52,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 19 [2021-07-09 17:11:52,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167100629] [2021-07-09 17:11:52,369 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:11:52,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:52,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:11:52,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:11:52,369 INFO L87 Difference]: Start difference. First operand 6771 states and 17645 transitions. Second operand has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:52,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:52,904 INFO L93 Difference]: Finished difference Result 11339 states and 27631 transitions. [2021-07-09 17:11:52,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:11:52,904 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:52,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:52,920 INFO L225 Difference]: With dead ends: 11339 [2021-07-09 17:11:52,920 INFO L226 Difference]: Without dead ends: 11339 [2021-07-09 17:11:52,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 298.0ms TimeCoverageRelationStatistics Valid=369, Invalid=623, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:11:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11339 states. [2021-07-09 17:11:53,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11339 to 6800. [2021-07-09 17:11:53,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6800 states, 6799 states have (on average 2.6087659949992648) internal successors, (17737), 6799 states have internal predecessors, (17737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:53,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6800 states to 6800 states and 17737 transitions. [2021-07-09 17:11:53,060 INFO L78 Accepts]: Start accepts. Automaton has 6800 states and 17737 transitions. Word has length 47 [2021-07-09 17:11:53,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:53,060 INFO L482 AbstractCegarLoop]: Abstraction has 6800 states and 17737 transitions. [2021-07-09 17:11:53,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.45) internal successors, (69), 19 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:53,060 INFO L276 IsEmpty]: Start isEmpty. Operand 6800 states and 17737 transitions. [2021-07-09 17:11:53,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:53,067 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:53,067 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:53,269 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:53,269 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:53,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:53,270 INFO L82 PathProgramCache]: Analyzing trace with hash -173445940, now seen corresponding path program 54 times [2021-07-09 17:11:53,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:53,270 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003990866] [2021-07-09 17:11:53,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:53,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:53,348 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 28 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:53,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:53,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003990866] [2021-07-09 17:11:53,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003990866] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:53,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685514408] [2021-07-09 17:11:53,349 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:53,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:11:53,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:53,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:53,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 70 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:53,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685514408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:53,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:53,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:11:53,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643312306] [2021-07-09 17:11:53,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:11:53,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:53,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:11:53,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:53,443 INFO L87 Difference]: Start difference. First operand 6800 states and 17737 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:53,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:53,720 INFO L93 Difference]: Finished difference Result 10003 states and 24584 transitions. [2021-07-09 17:11:53,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:11:53,721 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:53,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:53,739 INFO L225 Difference]: With dead ends: 10003 [2021-07-09 17:11:53,739 INFO L226 Difference]: Without dead ends: 10003 [2021-07-09 17:11:53,739 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 136.6ms TimeCoverageRelationStatistics Valid=163, Invalid=257, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:53,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10003 states. [2021-07-09 17:11:53,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10003 to 6809. [2021-07-09 17:11:53,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6809 states, 6808 states have (on average 2.608548766157462) internal successors, (17759), 6808 states have internal predecessors, (17759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:53,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6809 states to 6809 states and 17759 transitions. [2021-07-09 17:11:53,875 INFO L78 Accepts]: Start accepts. Automaton has 6809 states and 17759 transitions. Word has length 47 [2021-07-09 17:11:53,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:53,875 INFO L482 AbstractCegarLoop]: Abstraction has 6809 states and 17759 transitions. [2021-07-09 17:11:53,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:53,876 INFO L276 IsEmpty]: Start isEmpty. Operand 6809 states and 17759 transitions. [2021-07-09 17:11:53,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:53,882 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:53,882 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:54,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-07-09 17:11:54,099 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:54,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:54,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1212732952, now seen corresponding path program 55 times [2021-07-09 17:11:54,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:54,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650236805] [2021-07-09 17:11:54,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:54,176 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 36 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:54,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:54,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650236805] [2021-07-09 17:11:54,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650236805] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:54,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333916437] [2021-07-09 17:11:54,176 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:54,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:54,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:54,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:54,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333916437] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:54,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:54,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:11:54,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65777074] [2021-07-09 17:11:54,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:11:54,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:54,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:11:54,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:11:54,302 INFO L87 Difference]: Start difference. First operand 6809 states and 17759 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:54,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:54,611 INFO L93 Difference]: Finished difference Result 8634 states and 21474 transitions. [2021-07-09 17:11:54,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:11:54,611 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:54,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:54,625 INFO L225 Difference]: With dead ends: 8634 [2021-07-09 17:11:54,625 INFO L226 Difference]: Without dead ends: 8634 [2021-07-09 17:11:54,625 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:11:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8634 states. [2021-07-09 17:11:54,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8634 to 6442. [2021-07-09 17:11:54,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6441 states have (on average 2.6028566992702995) internal successors, (16765), 6441 states have internal predecessors, (16765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:54,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16765 transitions. [2021-07-09 17:11:54,725 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16765 transitions. Word has length 47 [2021-07-09 17:11:54,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:54,725 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16765 transitions. [2021-07-09 17:11:54,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:54,726 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16765 transitions. [2021-07-09 17:11:54,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:54,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:54,733 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:54,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 223 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-07-09 17:11:54,950 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:54,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:54,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1612669180, now seen corresponding path program 118 times [2021-07-09 17:11:54,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:54,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505685762] [2021-07-09 17:11:54,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:54,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:55,026 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:55,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:55,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505685762] [2021-07-09 17:11:55,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505685762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:55,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782329461] [2021-07-09 17:11:55,026 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:55,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:11:55,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:55,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:55,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:11:55,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782329461] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:55,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:55,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:11:55,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139333476] [2021-07-09 17:11:55,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:11:55,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:55,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:11:55,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:55,121 INFO L87 Difference]: Start difference. First operand 6442 states and 16765 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:55,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:55,328 INFO L93 Difference]: Finished difference Result 7636 states and 18887 transitions. [2021-07-09 17:11:55,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:11:55,328 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:55,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:55,337 INFO L225 Difference]: With dead ends: 7636 [2021-07-09 17:11:55,337 INFO L226 Difference]: Without dead ends: 7600 [2021-07-09 17:11:55,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:11:55,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7600 states. [2021-07-09 17:11:55,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7600 to 6442. [2021-07-09 17:11:55,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6442 states, 6441 states have (on average 2.60192516689955) internal successors, (16759), 6441 states have internal predecessors, (16759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:55,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6442 states to 6442 states and 16759 transitions. [2021-07-09 17:11:55,430 INFO L78 Accepts]: Start accepts. Automaton has 6442 states and 16759 transitions. Word has length 47 [2021-07-09 17:11:55,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:55,430 INFO L482 AbstractCegarLoop]: Abstraction has 6442 states and 16759 transitions. [2021-07-09 17:11:55,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 6442 states and 16759 transitions. [2021-07-09 17:11:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:55,436 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:55,436 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:55,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable434 [2021-07-09 17:11:55,642 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:55,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:55,642 INFO L82 PathProgramCache]: Analyzing trace with hash -2022814789, now seen corresponding path program 56 times [2021-07-09 17:11:55,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:55,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124711355] [2021-07-09 17:11:55,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:55,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:55,710 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 7 proven. 87 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:55,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:55,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124711355] [2021-07-09 17:11:55,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124711355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:55,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739655089] [2021-07-09 17:11:55,710 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:55,743 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:55,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:55,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:55,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:55,809 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 88 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:55,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739655089] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:55,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:55,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:11:55,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968364948] [2021-07-09 17:11:55,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:55,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:55,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:55,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:55,810 INFO L87 Difference]: Start difference. First operand 6442 states and 16759 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:56,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:56,185 INFO L93 Difference]: Finished difference Result 7550 states and 18942 transitions. [2021-07-09 17:11:56,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:56,186 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:56,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:56,195 INFO L225 Difference]: With dead ends: 7550 [2021-07-09 17:11:56,195 INFO L226 Difference]: Without dead ends: 7535 [2021-07-09 17:11:56,195 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:56,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7535 states. [2021-07-09 17:11:56,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7535 to 6598. [2021-07-09 17:11:56,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6598 states, 6597 states have (on average 2.5970895861755343) internal successors, (17133), 6597 states have internal predecessors, (17133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6598 states to 6598 states and 17133 transitions. [2021-07-09 17:11:56,280 INFO L78 Accepts]: Start accepts. Automaton has 6598 states and 17133 transitions. Word has length 47 [2021-07-09 17:11:56,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:56,280 INFO L482 AbstractCegarLoop]: Abstraction has 6598 states and 17133 transitions. [2021-07-09 17:11:56,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:56,280 INFO L276 IsEmpty]: Start isEmpty. Operand 6598 states and 17133 transitions. [2021-07-09 17:11:56,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:56,286 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:56,286 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:56,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:56,501 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:56,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:56,502 INFO L82 PathProgramCache]: Analyzing trace with hash -522481797, now seen corresponding path program 119 times [2021-07-09 17:11:56,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:56,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717372758] [2021-07-09 17:11:56,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:56,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717372758] [2021-07-09 17:11:56,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717372758] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:56,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072427560] [2021-07-09 17:11:56,564 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:56,592 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:11:56,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:56,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:56,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:56,669 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 83 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:56,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072427560] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:56,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:56,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:11:56,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988994477] [2021-07-09 17:11:56,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:56,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:56,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:56,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:56,670 INFO L87 Difference]: Start difference. First operand 6598 states and 17133 transitions. Second operand has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:57,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:57,178 INFO L93 Difference]: Finished difference Result 7269 states and 18302 transitions. [2021-07-09 17:11:57,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:57,178 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:57,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:57,188 INFO L225 Difference]: With dead ends: 7269 [2021-07-09 17:11:57,188 INFO L226 Difference]: Without dead ends: 7177 [2021-07-09 17:11:57,188 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 105.1ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:57,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7177 states. [2021-07-09 17:11:57,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7177 to 6587. [2021-07-09 17:11:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6587 states, 6586 states have (on average 2.5889766170665047) internal successors, (17051), 6586 states have internal predecessors, (17051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6587 states to 6587 states and 17051 transitions. [2021-07-09 17:11:57,277 INFO L78 Accepts]: Start accepts. Automaton has 6587 states and 17051 transitions. Word has length 47 [2021-07-09 17:11:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:57,277 INFO L482 AbstractCegarLoop]: Abstraction has 6587 states and 17051 transitions. [2021-07-09 17:11:57,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.1) internal successors, (51), 9 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 6587 states and 17051 transitions. [2021-07-09 17:11:57,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:57,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:57,283 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:57,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable441 [2021-07-09 17:11:57,498 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:57,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:57,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1136017977, now seen corresponding path program 120 times [2021-07-09 17:11:57,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:57,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586652188] [2021-07-09 17:11:57,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:57,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:57,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:57,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586652188] [2021-07-09 17:11:57,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586652188] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:57,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113426323] [2021-07-09 17:11:57,567 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:57,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:11:57,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:57,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:57,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:11:57,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113426323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:57,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:57,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:11:57,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517888302] [2021-07-09 17:11:57,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:57,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:57,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:57,662 INFO L87 Difference]: Start difference. First operand 6587 states and 17051 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) [2021-07-09 17:11:57,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:57,983 INFO L93 Difference]: Finished difference Result 7638 states and 19101 transitions. [2021-07-09 17:11:57,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:11:57,983 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:57,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:57,993 INFO L225 Difference]: With dead ends: 7638 [2021-07-09 17:11:57,993 INFO L226 Difference]: Without dead ends: 7626 [2021-07-09 17:11:57,993 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:11:57,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7626 states. [2021-07-09 17:11:58,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7626 to 6635. [2021-07-09 17:11:58,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6635 states, 6634 states have (on average 2.588182092252035) internal successors, (17170), 6634 states have internal predecessors, (17170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6635 states to 6635 states and 17170 transitions. [2021-07-09 17:11:58,075 INFO L78 Accepts]: Start accepts. Automaton has 6635 states and 17170 transitions. Word has length 47 [2021-07-09 17:11:58,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:58,076 INFO L482 AbstractCegarLoop]: Abstraction has 6635 states and 17170 transitions. [2021-07-09 17:11:58,076 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) [2021-07-09 17:11:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 6635 states and 17170 transitions. [2021-07-09 17:11:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:58,081 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:58,081 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:58,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable442 [2021-07-09 17:11:58,296 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1293317464, now seen corresponding path program 57 times [2021-07-09 17:11:58,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:58,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842949878] [2021-07-09 17:11:58,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:58,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:58,346 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 60 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:11:58,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:58,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842949878] [2021-07-09 17:11:58,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842949878] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:58,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706497405] [2021-07-09 17:11:58,347 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:58,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:11:58,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:58,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:58,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:58,445 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 62 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:11:58,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706497405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:58,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:58,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-09 17:11:58,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833063833] [2021-07-09 17:11:58,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:58,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:58,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:58,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:58,446 INFO L87 Difference]: Start difference. First operand 6635 states and 17170 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:58,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:58,610 INFO L93 Difference]: Finished difference Result 7955 states and 19893 transitions. [2021-07-09 17:11:58,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:11:58,610 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:58,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:58,620 INFO L225 Difference]: With dead ends: 7955 [2021-07-09 17:11:58,621 INFO L226 Difference]: Without dead ends: 7935 [2021-07-09 17:11:58,621 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:11:58,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7935 states. [2021-07-09 17:11:58,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7935 to 6729. [2021-07-09 17:11:58,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6729 states, 6728 states have (on average 2.581004756242568) internal successors, (17365), 6728 states have internal predecessors, (17365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:58,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6729 states to 6729 states and 17365 transitions. [2021-07-09 17:11:58,715 INFO L78 Accepts]: Start accepts. Automaton has 6729 states and 17365 transitions. Word has length 47 [2021-07-09 17:11:58,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:58,715 INFO L482 AbstractCegarLoop]: Abstraction has 6729 states and 17365 transitions. [2021-07-09 17:11:58,715 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:58,715 INFO L276 IsEmpty]: Start isEmpty. Operand 6729 states and 17365 transitions. [2021-07-09 17:11:58,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:58,722 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:58,722 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:58,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable443 [2021-07-09 17:11:58,937 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:58,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:58,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1510591816, now seen corresponding path program 121 times [2021-07-09 17:11:58,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:58,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42552606] [2021-07-09 17:11:58,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:58,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:58,987 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:58,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:58,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42552606] [2021-07-09 17:11:58,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42552606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:58,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935017428] [2021-07-09 17:11:58,988 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:59,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:11:59,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:59,076 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 65 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:59,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935017428] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:59,076 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:59,076 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:11:59,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988271192] [2021-07-09 17:11:59,076 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:11:59,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:59,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:11:59,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:11:59,076 INFO L87 Difference]: Start difference. First operand 6729 states and 17365 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) [2021-07-09 17:11:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:11:59,216 INFO L93 Difference]: Finished difference Result 8206 states and 20010 transitions. [2021-07-09 17:11:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:11:59,216 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:11:59,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:11:59,226 INFO L225 Difference]: With dead ends: 8206 [2021-07-09 17:11:59,227 INFO L226 Difference]: Without dead ends: 8188 [2021-07-09 17:11:59,227 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:11:59,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8188 states. [2021-07-09 17:11:59,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8188 to 6724. [2021-07-09 17:11:59,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6724 states, 6723 states have (on average 2.5790569686152014) internal successors, (17339), 6723 states have internal predecessors, (17339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:11:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6724 states to 6724 states and 17339 transitions. [2021-07-09 17:11:59,317 INFO L78 Accepts]: Start accepts. Automaton has 6724 states and 17339 transitions. Word has length 47 [2021-07-09 17:11:59,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:11:59,318 INFO L482 AbstractCegarLoop]: Abstraction has 6724 states and 17339 transitions. [2021-07-09 17:11:59,318 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) [2021-07-09 17:11:59,318 INFO L276 IsEmpty]: Start isEmpty. Operand 6724 states and 17339 transitions. [2021-07-09 17:11:59,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:11:59,323 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:11:59,323 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:11:59,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable446 [2021-07-09 17:11:59,539 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:11:59,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:11:59,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1005899357, now seen corresponding path program 122 times [2021-07-09 17:11:59,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:11:59,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614119845] [2021-07-09 17:11:59,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:11:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:11:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:59,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:11:59,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614119845] [2021-07-09 17:11:59,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614119845] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:59,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126873346] [2021-07-09 17:11:59,606 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:11:59,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:11:59,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:11:59,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:11:59,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:11:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:11:59,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126873346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:11:59,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:11:59,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:11:59,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607517005] [2021-07-09 17:11:59,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:11:59,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:11:59,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:11:59,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:11:59,698 INFO L87 Difference]: Start difference. First operand 6724 states and 17339 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:00,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:00,202 INFO L93 Difference]: Finished difference Result 8839 states and 21652 transitions. [2021-07-09 17:12:00,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:12:00,202 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:00,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:00,213 INFO L225 Difference]: With dead ends: 8839 [2021-07-09 17:12:00,214 INFO L226 Difference]: Without dead ends: 8785 [2021-07-09 17:12:00,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 188.4ms TimeCoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:12:00,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8785 states. [2021-07-09 17:12:00,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8785 to 6842. [2021-07-09 17:12:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6841 states have (on average 2.579447449203333) internal successors, (17646), 6841 states have internal predecessors, (17646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:00,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17646 transitions. [2021-07-09 17:12:00,311 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17646 transitions. Word has length 47 [2021-07-09 17:12:00,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:00,311 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17646 transitions. [2021-07-09 17:12:00,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:00,311 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17646 transitions. [2021-07-09 17:12:00,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:00,316 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:00,316 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:00,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable449,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:00,532 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:00,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:00,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1756508830, now seen corresponding path program 123 times [2021-07-09 17:12:00,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:00,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642393156] [2021-07-09 17:12:00,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:00,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:00,630 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642393156] [2021-07-09 17:12:00,630 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642393156] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:00,630 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646316949] [2021-07-09 17:12:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:00,713 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:12:00,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:00,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:00,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:00,774 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 28 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:00,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646316949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:00,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:00,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:12:00,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554089434] [2021-07-09 17:12:00,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:12:00,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:00,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:12:00,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:12:00,775 INFO L87 Difference]: Start difference. First operand 6842 states and 17646 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:00,927 INFO L93 Difference]: Finished difference Result 8382 states and 20407 transitions. [2021-07-09 17:12:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:00,927 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:00,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:00,941 INFO L225 Difference]: With dead ends: 8382 [2021-07-09 17:12:00,941 INFO L226 Difference]: Without dead ends: 8358 [2021-07-09 17:12:00,941 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 94.2ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:00,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8358 states. [2021-07-09 17:12:01,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8358 to 6842. [2021-07-09 17:12:01,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6842 states, 6841 states have (on average 2.5778394971495397) internal successors, (17635), 6841 states have internal predecessors, (17635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:01,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6842 states to 6842 states and 17635 transitions. [2021-07-09 17:12:01,065 INFO L78 Accepts]: Start accepts. Automaton has 6842 states and 17635 transitions. Word has length 47 [2021-07-09 17:12:01,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:01,065 INFO L482 AbstractCegarLoop]: Abstraction has 6842 states and 17635 transitions. [2021-07-09 17:12:01,065 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:01,065 INFO L276 IsEmpty]: Start isEmpty. Operand 6842 states and 17635 transitions. [2021-07-09 17:12:01,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:01,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:01,072 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:01,287 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable450 [2021-07-09 17:12:01,288 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:01,288 INFO L82 PathProgramCache]: Analyzing trace with hash 1160735891, now seen corresponding path program 124 times [2021-07-09 17:12:01,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:01,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816080171] [2021-07-09 17:12:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:01,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:01,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816080171] [2021-07-09 17:12:01,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816080171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:01,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166095596] [2021-07-09 17:12:01,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:01,402 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:01,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:01,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:01,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:01,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [166095596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:01,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:01,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:12:01,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059738741] [2021-07-09 17:12:01,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:12:01,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:01,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:12:01,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:01,471 INFO L87 Difference]: Start difference. First operand 6842 states and 17635 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:02,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:02,265 INFO L93 Difference]: Finished difference Result 11528 states and 27416 transitions. [2021-07-09 17:12:02,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-09 17:12:02,266 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:02,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:02,282 INFO L225 Difference]: With dead ends: 11528 [2021-07-09 17:12:02,282 INFO L226 Difference]: Without dead ends: 11348 [2021-07-09 17:12:02,283 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:12:02,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11348 states. [2021-07-09 17:12:02,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11348 to 7099. [2021-07-09 17:12:02,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 2.5736827275288814) internal successors, (18268), 7098 states have internal predecessors, (18268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:02,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18268 transitions. [2021-07-09 17:12:02,398 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18268 transitions. Word has length 47 [2021-07-09 17:12:02,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:02,398 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18268 transitions. [2021-07-09 17:12:02,398 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:02,398 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18268 transitions. [2021-07-09 17:12:02,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:02,404 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:02,404 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:02,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-07-09 17:12:02,608 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:02,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:02,608 INFO L82 PathProgramCache]: Analyzing trace with hash 1547338568, now seen corresponding path program 125 times [2021-07-09 17:12:02,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:02,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207901563] [2021-07-09 17:12:02,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:02,679 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:02,680 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:02,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207901563] [2021-07-09 17:12:02,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207901563] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:02,680 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86287481] [2021-07-09 17:12:02,680 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:02,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:12:02,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 26 proven. 71 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:02,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86287481] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:02,786 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:02,786 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-07-09 17:12:02,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204086063] [2021-07-09 17:12:02,786 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:12:02,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:02,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:12:02,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:02,787 INFO L87 Difference]: Start difference. First operand 7099 states and 18268 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:03,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:03,067 INFO L93 Difference]: Finished difference Result 8869 states and 21483 transitions. [2021-07-09 17:12:03,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:03,067 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:03,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:03,080 INFO L225 Difference]: With dead ends: 8869 [2021-07-09 17:12:03,080 INFO L226 Difference]: Without dead ends: 8836 [2021-07-09 17:12:03,081 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 110.4ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:03,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8836 states. [2021-07-09 17:12:03,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8836 to 7099. [2021-07-09 17:12:03,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7099 states, 7098 states have (on average 2.5732600732600734) internal successors, (18265), 7098 states have internal predecessors, (18265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7099 states to 7099 states and 18265 transitions. [2021-07-09 17:12:03,184 INFO L78 Accepts]: Start accepts. Automaton has 7099 states and 18265 transitions. Word has length 47 [2021-07-09 17:12:03,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:03,184 INFO L482 AbstractCegarLoop]: Abstraction has 7099 states and 18265 transitions. [2021-07-09 17:12:03,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 7099 states and 18265 transitions. [2021-07-09 17:12:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:03,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:03,189 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:03,405 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable455 [2021-07-09 17:12:03,405 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:03,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:03,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1101044381, now seen corresponding path program 126 times [2021-07-09 17:12:03,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:03,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716418571] [2021-07-09 17:12:03,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:03,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:03,489 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:03,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:03,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716418571] [2021-07-09 17:12:03,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1716418571] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:03,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584798114] [2021-07-09 17:12:03,490 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:03,516 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 17:12:03,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:03,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:03,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:03,581 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:03,581 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584798114] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:03,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:03,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:12:03,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747665887] [2021-07-09 17:12:03,582 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:12:03,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:03,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:12:03,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:03,582 INFO L87 Difference]: Start difference. First operand 7099 states and 18265 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:04,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:04,725 INFO L93 Difference]: Finished difference Result 13900 states and 32512 transitions. [2021-07-09 17:12:04,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-07-09 17:12:04,725 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:04,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:04,744 INFO L225 Difference]: With dead ends: 13900 [2021-07-09 17:12:04,744 INFO L226 Difference]: Without dead ends: 13624 [2021-07-09 17:12:04,745 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 680.9ms TimeCoverageRelationStatistics Valid=489, Invalid=3671, Unknown=0, NotChecked=0, Total=4160 [2021-07-09 17:12:04,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13624 states. [2021-07-09 17:12:04,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13624 to 7315. [2021-07-09 17:12:04,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7315 states, 7314 states have (on average 2.568635493573968) internal successors, (18787), 7314 states have internal predecessors, (18787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:04,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7315 states to 7315 states and 18787 transitions. [2021-07-09 17:12:04,874 INFO L78 Accepts]: Start accepts. Automaton has 7315 states and 18787 transitions. Word has length 47 [2021-07-09 17:12:04,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:04,874 INFO L482 AbstractCegarLoop]: Abstraction has 7315 states and 18787 transitions. [2021-07-09 17:12:04,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:04,874 INFO L276 IsEmpty]: Start isEmpty. Operand 7315 states and 18787 transitions. [2021-07-09 17:12:04,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:04,880 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:04,880 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:05,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:05,093 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:05,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:05,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1300350046, now seen corresponding path program 127 times [2021-07-09 17:12:05,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:05,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179889112] [2021-07-09 17:12:05,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:05,169 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:05,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:05,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179889112] [2021-07-09 17:12:05,169 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179889112] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:05,169 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359165398] [2021-07-09 17:12:05,169 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:05,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:05,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:05,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:05,261 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 30 proven. 67 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:05,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359165398] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:05,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:05,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:12:05,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102899762] [2021-07-09 17:12:05,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:12:05,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:05,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:12:05,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:05,262 INFO L87 Difference]: Start difference. First operand 7315 states and 18787 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:05,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:05,511 INFO L93 Difference]: Finished difference Result 9027 states and 21871 transitions. [2021-07-09 17:12:05,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:12:05,511 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:05,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:05,525 INFO L225 Difference]: With dead ends: 9027 [2021-07-09 17:12:05,525 INFO L226 Difference]: Without dead ends: 8985 [2021-07-09 17:12:05,526 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 113.1ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:05,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8985 states. [2021-07-09 17:12:05,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8985 to 7097. [2021-07-09 17:12:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7097 states, 7096 states have (on average 2.5593291995490417) internal successors, (18161), 7096 states have internal predecessors, (18161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:05,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7097 states to 7097 states and 18161 transitions. [2021-07-09 17:12:05,632 INFO L78 Accepts]: Start accepts. Automaton has 7097 states and 18161 transitions. Word has length 47 [2021-07-09 17:12:05,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:05,632 INFO L482 AbstractCegarLoop]: Abstraction has 7097 states and 18161 transitions. [2021-07-09 17:12:05,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:05,633 INFO L276 IsEmpty]: Start isEmpty. Operand 7097 states and 18161 transitions. [2021-07-09 17:12:05,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:05,638 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:05,638 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:05,854 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable461,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:05,854 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:05,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:05,854 INFO L82 PathProgramCache]: Analyzing trace with hash 947730515, now seen corresponding path program 128 times [2021-07-09 17:12:05,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:05,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120166417] [2021-07-09 17:12:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:05,948 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:05,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:05,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120166417] [2021-07-09 17:12:05,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120166417] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:05,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313319363] [2021-07-09 17:12:05,948 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:05,976 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:05,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:05,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:05,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:06,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1313319363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:06,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:06,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:12:06,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104040485] [2021-07-09 17:12:06,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:06,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:06,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:06,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:06,042 INFO L87 Difference]: Start difference. First operand 7097 states and 18161 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:06,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:06,648 INFO L93 Difference]: Finished difference Result 9058 states and 21780 transitions. [2021-07-09 17:12:06,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:06,648 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:06,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:06,660 INFO L225 Difference]: With dead ends: 9058 [2021-07-09 17:12:06,660 INFO L226 Difference]: Without dead ends: 8680 [2021-07-09 17:12:06,661 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 258.2ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:12:06,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8680 states. [2021-07-09 17:12:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8680 to 6394. [2021-07-09 17:12:06,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6394 states, 6393 states have (on average 2.564210855623338) internal successors, (16393), 6393 states have internal predecessors, (16393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:06,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6394 states to 6394 states and 16393 transitions. [2021-07-09 17:12:06,769 INFO L78 Accepts]: Start accepts. Automaton has 6394 states and 16393 transitions. Word has length 47 [2021-07-09 17:12:06,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:06,769 INFO L482 AbstractCegarLoop]: Abstraction has 6394 states and 16393 transitions. [2021-07-09 17:12:06,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:06,770 INFO L276 IsEmpty]: Start isEmpty. Operand 6394 states and 16393 transitions. [2021-07-09 17:12:06,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:06,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:06,776 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:06,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable467,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:06,995 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:06,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:06,995 INFO L82 PathProgramCache]: Analyzing trace with hash 87788588, now seen corresponding path program 58 times [2021-07-09 17:12:06,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:06,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42238324] [2021-07-09 17:12:06,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:06,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:07,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:07,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42238324] [2021-07-09 17:12:07,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42238324] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:07,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360163997] [2021-07-09 17:12:07,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:07,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:07,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:07,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:07,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:07,153 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:07,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360163997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:07,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:07,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-09 17:12:07,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636396193] [2021-07-09 17:12:07,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:12:07,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:07,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:12:07,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:12:07,154 INFO L87 Difference]: Start difference. First operand 6394 states and 16393 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:07,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:07,368 INFO L93 Difference]: Finished difference Result 9182 states and 22469 transitions. [2021-07-09 17:12:07,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:07,368 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:07,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:07,381 INFO L225 Difference]: With dead ends: 9182 [2021-07-09 17:12:07,381 INFO L226 Difference]: Without dead ends: 9182 [2021-07-09 17:12:07,382 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:12:07,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9182 states. [2021-07-09 17:12:07,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9182 to 6584. [2021-07-09 17:12:07,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6584 states, 6583 states have (on average 2.5773963238644995) internal successors, (16967), 6583 states have internal predecessors, (16967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:07,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6584 states to 6584 states and 16967 transitions. [2021-07-09 17:12:07,484 INFO L78 Accepts]: Start accepts. Automaton has 6584 states and 16967 transitions. Word has length 47 [2021-07-09 17:12:07,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:07,484 INFO L482 AbstractCegarLoop]: Abstraction has 6584 states and 16967 transitions. [2021-07-09 17:12:07,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:07,485 INFO L276 IsEmpty]: Start isEmpty. Operand 6584 states and 16967 transitions. [2021-07-09 17:12:07,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:07,490 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:07,490 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:07,706 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable468 [2021-07-09 17:12:07,706 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:07,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:07,706 INFO L82 PathProgramCache]: Analyzing trace with hash -1549783868, now seen corresponding path program 59 times [2021-07-09 17:12:07,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:07,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636198394] [2021-07-09 17:12:07,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:07,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:07,773 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 75 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:07,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:07,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636198394] [2021-07-09 17:12:07,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636198394] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:07,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627654219] [2021-07-09 17:12:07,773 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:07,800 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 17:12:07,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:07,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:07,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:07,980 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 76 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:07,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627654219] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:07,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:07,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 24 [2021-07-09 17:12:07,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618057624] [2021-07-09 17:12:07,981 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:12:07,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:07,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:12:07,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:12:07,981 INFO L87 Difference]: Start difference. First operand 6584 states and 16967 transitions. Second operand has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:08,806 INFO L93 Difference]: Finished difference Result 10546 states and 25434 transitions. [2021-07-09 17:12:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:12:08,807 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:08,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:08,822 INFO L225 Difference]: With dead ends: 10546 [2021-07-09 17:12:08,822 INFO L226 Difference]: Without dead ends: 10546 [2021-07-09 17:12:08,823 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 450.4ms TimeCoverageRelationStatistics Valid=568, Invalid=1154, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:12:08,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10546 states. [2021-07-09 17:12:08,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10546 to 6608. [2021-07-09 17:12:08,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6608 states, 6607 states have (on average 2.5784773724837295) internal successors, (17036), 6607 states have internal predecessors, (17036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:08,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6608 states to 6608 states and 17036 transitions. [2021-07-09 17:12:08,930 INFO L78 Accepts]: Start accepts. Automaton has 6608 states and 17036 transitions. Word has length 47 [2021-07-09 17:12:08,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:08,930 INFO L482 AbstractCegarLoop]: Abstraction has 6608 states and 17036 transitions. [2021-07-09 17:12:08,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.32) internal successors, (83), 24 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:08,930 INFO L276 IsEmpty]: Start isEmpty. Operand 6608 states and 17036 transitions. [2021-07-09 17:12:08,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:08,935 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:08,935 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:09,148 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable469,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:09,149 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:09,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:09,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1055188264, now seen corresponding path program 60 times [2021-07-09 17:12:09,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:09,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585825343] [2021-07-09 17:12:09,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:09,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:09,219 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 71 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:09,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:09,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585825343] [2021-07-09 17:12:09,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585825343] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:09,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734982025] [2021-07-09 17:12:09,219 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:09,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 17:12:09,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:09,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:09,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:09,322 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:09,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [734982025] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:09,322 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:09,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:12:09,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675446857] [2021-07-09 17:12:09,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:12:09,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:09,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:12:09,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:09,322 INFO L87 Difference]: Start difference. First operand 6608 states and 17036 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:09,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:09,643 INFO L93 Difference]: Finished difference Result 9881 states and 24078 transitions. [2021-07-09 17:12:09,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:09,643 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:09,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:09,657 INFO L225 Difference]: With dead ends: 9881 [2021-07-09 17:12:09,658 INFO L226 Difference]: Without dead ends: 9881 [2021-07-09 17:12:09,658 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=213, Invalid=339, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:09,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9881 states. [2021-07-09 17:12:09,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9881 to 6643. [2021-07-09 17:12:09,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6643 states, 6642 states have (on average 2.580246913580247) internal successors, (17138), 6642 states have internal predecessors, (17138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6643 states to 6643 states and 17138 transitions. [2021-07-09 17:12:09,777 INFO L78 Accepts]: Start accepts. Automaton has 6643 states and 17138 transitions. Word has length 47 [2021-07-09 17:12:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:09,777 INFO L482 AbstractCegarLoop]: Abstraction has 6643 states and 17138 transitions. [2021-07-09 17:12:09,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 12 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 6643 states and 17138 transitions. [2021-07-09 17:12:09,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:09,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:09,783 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:09,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable470,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:09,999 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:09,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:09,999 INFO L82 PathProgramCache]: Analyzing trace with hash 15901252, now seen corresponding path program 61 times [2021-07-09 17:12:09,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:09,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903762803] [2021-07-09 17:12:09,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:10,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:10,081 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:10,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:10,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903762803] [2021-07-09 17:12:10,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903762803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:10,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701215113] [2021-07-09 17:12:10,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:10,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:10,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:10,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:10,229 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:10,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701215113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:10,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:10,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:12:10,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816988294] [2021-07-09 17:12:10,229 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:10,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:10,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:10,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:10,230 INFO L87 Difference]: Start difference. First operand 6643 states and 17138 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:10,627 INFO L93 Difference]: Finished difference Result 9085 states and 22271 transitions. [2021-07-09 17:12:10,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:12:10,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:10,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:10,639 INFO L225 Difference]: With dead ends: 9085 [2021-07-09 17:12:10,639 INFO L226 Difference]: Without dead ends: 9085 [2021-07-09 17:12:10,639 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 196.3ms TimeCoverageRelationStatistics Valid=227, Invalid=373, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:12:10,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9085 states. [2021-07-09 17:12:10,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9085 to 6641. [2021-07-09 17:12:10,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6641 states, 6640 states have (on average 2.5802710843373493) internal successors, (17133), 6640 states have internal predecessors, (17133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:10,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6641 states to 6641 states and 17133 transitions. [2021-07-09 17:12:10,737 INFO L78 Accepts]: Start accepts. Automaton has 6641 states and 17133 transitions. Word has length 47 [2021-07-09 17:12:10,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:10,737 INFO L482 AbstractCegarLoop]: Abstraction has 6641 states and 17133 transitions. [2021-07-09 17:12:10,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:10,738 INFO L276 IsEmpty]: Start isEmpty. Operand 6641 states and 17133 transitions. [2021-07-09 17:12:10,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:10,744 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:10,744 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:10,960 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable471,240 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:10,960 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:10,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1035763624, now seen corresponding path program 62 times [2021-07-09 17:12:10,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:10,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420229148] [2021-07-09 17:12:10,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:11,063 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 63 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:11,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:11,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420229148] [2021-07-09 17:12:11,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420229148] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:11,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535702550] [2021-07-09 17:12:11,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:11,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:11,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:11,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:11,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 64 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:11,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535702550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:11,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:11,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-09 17:12:11,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139203389] [2021-07-09 17:12:11,177 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:12:11,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:11,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:12:11,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:11,177 INFO L87 Difference]: Start difference. First operand 6641 states and 17133 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:11,589 INFO L93 Difference]: Finished difference Result 7979 states and 19784 transitions. [2021-07-09 17:12:11,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:11,589 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:11,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:11,599 INFO L225 Difference]: With dead ends: 7979 [2021-07-09 17:12:11,600 INFO L226 Difference]: Without dead ends: 7979 [2021-07-09 17:12:11,600 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:11,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7979 states. [2021-07-09 17:12:11,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7979 to 6178. [2021-07-09 17:12:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6178 states, 6177 states have (on average 2.5810263882143434) internal successors, (15943), 6177 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:11,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6178 states to 6178 states and 15943 transitions. [2021-07-09 17:12:11,681 INFO L78 Accepts]: Start accepts. Automaton has 6178 states and 15943 transitions. Word has length 47 [2021-07-09 17:12:11,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:11,681 INFO L482 AbstractCegarLoop]: Abstraction has 6178 states and 15943 transitions. [2021-07-09 17:12:11,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:11,681 INFO L276 IsEmpty]: Start isEmpty. Operand 6178 states and 15943 transitions. [2021-07-09 17:12:11,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:11,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:11,686 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:11,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:11,901 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:11,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:11,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1697148168, now seen corresponding path program 129 times [2021-07-09 17:12:11,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:11,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821194915] [2021-07-09 17:12:11,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:11,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:11,986 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:11,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:11,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821194915] [2021-07-09 17:12:11,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821194915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:11,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810436318] [2021-07-09 17:12:11,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:12,014 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-07-09 17:12:12,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:12,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:12,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:12,092 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:12,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810436318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:12,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:12,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:12:12,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584817566] [2021-07-09 17:12:12,093 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:12,093 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:12,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:12,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:12,093 INFO L87 Difference]: Start difference. First operand 6178 states and 15943 transitions. Second operand has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:12,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:12,308 INFO L93 Difference]: Finished difference Result 7415 states and 18154 transitions. [2021-07-09 17:12:12,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:12:12,308 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:12,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:12,317 INFO L225 Difference]: With dead ends: 7415 [2021-07-09 17:12:12,318 INFO L226 Difference]: Without dead ends: 7370 [2021-07-09 17:12:12,318 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:12:12,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7370 states. [2021-07-09 17:12:12,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7370 to 6187. [2021-07-09 17:12:12,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6187 states, 6186 states have (on average 2.5796960879405106) internal successors, (15958), 6186 states have internal predecessors, (15958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6187 states to 6187 states and 15958 transitions. [2021-07-09 17:12:12,408 INFO L78 Accepts]: Start accepts. Automaton has 6187 states and 15958 transitions. Word has length 47 [2021-07-09 17:12:12,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:12,408 INFO L482 AbstractCegarLoop]: Abstraction has 6187 states and 15958 transitions. [2021-07-09 17:12:12,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2857142857142856) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:12,408 INFO L276 IsEmpty]: Start isEmpty. Operand 6187 states and 15958 transitions. [2021-07-09 17:12:12,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:12,414 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:12,414 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:12,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable473,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:12,630 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:12,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:12,631 INFO L82 PathProgramCache]: Analyzing trace with hash -686375646, now seen corresponding path program 130 times [2021-07-09 17:12:12,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:12,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627837931] [2021-07-09 17:12:12,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:12,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:12,740 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:12,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:12,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627837931] [2021-07-09 17:12:12,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627837931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:12,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432426384] [2021-07-09 17:12:12,740 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:12,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:12,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:12,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:12,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:12,839 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 49 proven. 48 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:12,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [432426384] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:12,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:12,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:12:12,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080807088] [2021-07-09 17:12:12,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:12,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:12,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:12,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:12,840 INFO L87 Difference]: Start difference. First operand 6187 states and 15958 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:13,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:13,180 INFO L93 Difference]: Finished difference Result 7945 states and 19639 transitions. [2021-07-09 17:12:13,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:12:13,180 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:13,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:13,191 INFO L225 Difference]: With dead ends: 7945 [2021-07-09 17:12:13,191 INFO L226 Difference]: Without dead ends: 7945 [2021-07-09 17:12:13,191 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 168.8ms TimeCoverageRelationStatistics Valid=182, Invalid=324, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:13,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7945 states. [2021-07-09 17:12:13,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7945 to 6576. [2021-07-09 17:12:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6576 states, 6575 states have (on average 2.607148288973384) internal successors, (17142), 6575 states have internal predecessors, (17142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6576 states to 6576 states and 17142 transitions. [2021-07-09 17:12:13,291 INFO L78 Accepts]: Start accepts. Automaton has 6576 states and 17142 transitions. Word has length 47 [2021-07-09 17:12:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:13,291 INFO L482 AbstractCegarLoop]: Abstraction has 6576 states and 17142 transitions. [2021-07-09 17:12:13,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 13 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 6576 states and 17142 transitions. [2021-07-09 17:12:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:13,296 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:13,296 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:13,512 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable480 [2021-07-09 17:12:13,513 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:13,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:13,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1627893973, now seen corresponding path program 63 times [2021-07-09 17:12:13,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:13,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123642352] [2021-07-09 17:12:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:13,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:13,610 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:13,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:13,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123642352] [2021-07-09 17:12:13,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123642352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:13,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124929835] [2021-07-09 17:12:13,611 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:13,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:12:13,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:13,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:13,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:13,706 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:13,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124929835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:13,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:13,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:12:13,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131967956] [2021-07-09 17:12:13,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:13,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:13,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:13,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:13,707 INFO L87 Difference]: Start difference. First operand 6576 states and 17142 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:14,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:14,199 INFO L93 Difference]: Finished difference Result 9298 states and 22741 transitions. [2021-07-09 17:12:14,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:12:14,200 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:14,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:14,212 INFO L225 Difference]: With dead ends: 9298 [2021-07-09 17:12:14,212 INFO L226 Difference]: Without dead ends: 9166 [2021-07-09 17:12:14,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:12:14,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9166 states. [2021-07-09 17:12:14,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9166 to 6568. [2021-07-09 17:12:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6567 states have (on average 2.607735647936653) internal successors, (17125), 6567 states have internal predecessors, (17125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:14,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17125 transitions. [2021-07-09 17:12:14,314 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17125 transitions. Word has length 47 [2021-07-09 17:12:14,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:14,314 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17125 transitions. [2021-07-09 17:12:14,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:14,315 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17125 transitions. [2021-07-09 17:12:14,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:14,320 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:14,320 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:14,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable481,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:14,533 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:14,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:14,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1148331157, now seen corresponding path program 131 times [2021-07-09 17:12:14,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:14,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411479250] [2021-07-09 17:12:14,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:14,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:14,645 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:14,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:14,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411479250] [2021-07-09 17:12:14,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411479250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:14,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672229785] [2021-07-09 17:12:14,645 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:14,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:12:14,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:14,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:14,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:14,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672229785] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:14,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:14,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 17 [2021-07-09 17:12:14,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589479387] [2021-07-09 17:12:14,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:12:14,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:14,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:12:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:12:14,927 INFO L87 Difference]: Start difference. First operand 6568 states and 17125 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:15,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:15,610 INFO L93 Difference]: Finished difference Result 6738 states and 17392 transitions. [2021-07-09 17:12:15,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:15,610 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:15,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:15,618 INFO L225 Difference]: With dead ends: 6738 [2021-07-09 17:12:15,619 INFO L226 Difference]: Without dead ends: 6682 [2021-07-09 17:12:15,619 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6682 states. [2021-07-09 17:12:15,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6682 to 6568. [2021-07-09 17:12:15,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6568 states, 6567 states have (on average 2.6045378407187454) internal successors, (17104), 6567 states have internal predecessors, (17104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:15,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6568 states to 6568 states and 17104 transitions. [2021-07-09 17:12:15,698 INFO L78 Accepts]: Start accepts. Automaton has 6568 states and 17104 transitions. Word has length 47 [2021-07-09 17:12:15,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:15,699 INFO L482 AbstractCegarLoop]: Abstraction has 6568 states and 17104 transitions. [2021-07-09 17:12:15,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 17 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:15,699 INFO L276 IsEmpty]: Start isEmpty. Operand 6568 states and 17104 transitions. [2021-07-09 17:12:15,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:15,703 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:15,704 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:15,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable482 [2021-07-09 17:12:15,920 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:15,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:15,920 INFO L82 PathProgramCache]: Analyzing trace with hash -759601188, now seen corresponding path program 64 times [2021-07-09 17:12:15,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:15,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206242226] [2021-07-09 17:12:15,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:15,996 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 35 proven. 61 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:15,996 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:15,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206242226] [2021-07-09 17:12:15,996 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206242226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:15,996 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135603954] [2021-07-09 17:12:15,996 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:16,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:16,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:16,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:16,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:16,100 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:16,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [135603954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:16,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:16,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:12:16,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744643688] [2021-07-09 17:12:16,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:16,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:16,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:16,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:16,101 INFO L87 Difference]: Start difference. First operand 6568 states and 17104 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:16,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:16,312 INFO L93 Difference]: Finished difference Result 8053 states and 20088 transitions. [2021-07-09 17:12:16,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:12:16,312 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:16,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:16,323 INFO L225 Difference]: With dead ends: 8053 [2021-07-09 17:12:16,323 INFO L226 Difference]: Without dead ends: 7951 [2021-07-09 17:12:16,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 113.6ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:16,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7951 states. [2021-07-09 17:12:16,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7951 to 6416. [2021-07-09 17:12:16,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6416 states, 6415 states have (on average 2.6084177708495715) internal successors, (16733), 6415 states have internal predecessors, (16733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:16,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6416 states to 6416 states and 16733 transitions. [2021-07-09 17:12:16,410 INFO L78 Accepts]: Start accepts. Automaton has 6416 states and 16733 transitions. Word has length 47 [2021-07-09 17:12:16,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:16,411 INFO L482 AbstractCegarLoop]: Abstraction has 6416 states and 16733 transitions. [2021-07-09 17:12:16,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:16,411 INFO L276 IsEmpty]: Start isEmpty. Operand 6416 states and 16733 transitions. [2021-07-09 17:12:16,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:16,415 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:16,415 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:16,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable483,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:16,631 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:16,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:16,632 INFO L82 PathProgramCache]: Analyzing trace with hash 372425610, now seen corresponding path program 132 times [2021-07-09 17:12:16,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:16,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633687371] [2021-07-09 17:12:16,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:16,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:16,709 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:16,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:16,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633687371] [2021-07-09 17:12:16,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633687371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:16,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972713687] [2021-07-09 17:12:16,710 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:16,738 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:12:16,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:16,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:12:16,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:16,851 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 80 proven. 17 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:16,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972713687] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:16,851 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:16,851 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-09 17:12:16,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405383155] [2021-07-09 17:12:16,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:12:16,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:16,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:12:16,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:12:16,852 INFO L87 Difference]: Start difference. First operand 6416 states and 16733 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:17,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:17,157 INFO L93 Difference]: Finished difference Result 8176 states and 20353 transitions. [2021-07-09 17:12:17,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:17,157 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:17,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:17,168 INFO L225 Difference]: With dead ends: 8176 [2021-07-09 17:12:17,168 INFO L226 Difference]: Without dead ends: 8176 [2021-07-09 17:12:17,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 182.5ms TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:12:17,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8176 states. [2021-07-09 17:12:17,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8176 to 6714. [2021-07-09 17:12:17,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6714 states, 6713 states have (on average 2.627588261582005) internal successors, (17639), 6713 states have internal predecessors, (17639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6714 states to 6714 states and 17639 transitions. [2021-07-09 17:12:17,266 INFO L78 Accepts]: Start accepts. Automaton has 6714 states and 17639 transitions. Word has length 47 [2021-07-09 17:12:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:17,266 INFO L482 AbstractCegarLoop]: Abstraction has 6714 states and 17639 transitions. [2021-07-09 17:12:17,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 6714 states and 17639 transitions. [2021-07-09 17:12:17,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:17,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:17,275 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:17,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable489 [2021-07-09 17:12:17,490 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:17,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:17,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1064796407, now seen corresponding path program 65 times [2021-07-09 17:12:17,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:17,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351931800] [2021-07-09 17:12:17,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:17,585 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:17,585 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:17,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351931800] [2021-07-09 17:12:17,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351931800] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:17,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068676045] [2021-07-09 17:12:17,586 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:17,614 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:12:17,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:17,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:17,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:17,680 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:17,680 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068676045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:17,684 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:17,684 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:12:17,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905548610] [2021-07-09 17:12:17,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:12:17,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:17,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:12:17,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:17,693 INFO L87 Difference]: Start difference. First operand 6714 states and 17639 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:18,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:18,146 INFO L93 Difference]: Finished difference Result 8947 states and 22376 transitions. [2021-07-09 17:12:18,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:12:18,151 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:18,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:18,167 INFO L225 Difference]: With dead ends: 8947 [2021-07-09 17:12:18,167 INFO L226 Difference]: Without dead ends: 8933 [2021-07-09 17:12:18,169 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 206.5ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:12:18,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8933 states. [2021-07-09 17:12:18,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8933 to 6712. [2021-07-09 17:12:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 2.633586648785576) internal successors, (17674), 6711 states have internal predecessors, (17674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:18,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17674 transitions. [2021-07-09 17:12:18,284 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17674 transitions. Word has length 47 [2021-07-09 17:12:18,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:18,284 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17674 transitions. [2021-07-09 17:12:18,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:18,284 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17674 transitions. [2021-07-09 17:12:18,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:18,289 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:18,289 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:18,507 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:18,507 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:18,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:18,507 INFO L82 PathProgramCache]: Analyzing trace with hash 902744311, now seen corresponding path program 133 times [2021-07-09 17:12:18,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:18,508 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656514641] [2021-07-09 17:12:18,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:18,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:18,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:18,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656514641] [2021-07-09 17:12:18,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656514641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:18,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820940634] [2021-07-09 17:12:18,601 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:18,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:18,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:18,792 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:18,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820940634] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:18,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:18,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-07-09 17:12:18,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055695517] [2021-07-09 17:12:18,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:12:18,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:12:18,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:12:18,793 INFO L87 Difference]: Start difference. First operand 6712 states and 17674 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:19,228 INFO L93 Difference]: Finished difference Result 6816 states and 17833 transitions. [2021-07-09 17:12:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:12:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:19,238 INFO L225 Difference]: With dead ends: 6816 [2021-07-09 17:12:19,238 INFO L226 Difference]: Without dead ends: 6772 [2021-07-09 17:12:19,238 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 152.5ms TimeCoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:12:19,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6772 states. [2021-07-09 17:12:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6772 to 6712. [2021-07-09 17:12:19,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6712 states, 6711 states have (on average 2.6322455669795857) internal successors, (17665), 6711 states have internal predecessors, (17665), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:19,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6712 states to 6712 states and 17665 transitions. [2021-07-09 17:12:19,323 INFO L78 Accepts]: Start accepts. Automaton has 6712 states and 17665 transitions. Word has length 47 [2021-07-09 17:12:19,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:19,323 INFO L482 AbstractCegarLoop]: Abstraction has 6712 states and 17665 transitions. [2021-07-09 17:12:19,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:19,323 INFO L276 IsEmpty]: Start isEmpty. Operand 6712 states and 17665 transitions. [2021-07-09 17:12:19,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:19,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:19,328 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:19,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable493,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:19,545 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:19,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:19,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1077953366, now seen corresponding path program 66 times [2021-07-09 17:12:19,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:19,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646340142] [2021-07-09 17:12:19,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:19,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:19,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646340142] [2021-07-09 17:12:19,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646340142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:19,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500578226] [2021-07-09 17:12:19,621 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:19,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:12:19,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:19,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:19,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:19,740 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 41 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:19,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500578226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:19,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:19,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-07-09 17:12:19,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834359020] [2021-07-09 17:12:19,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:12:19,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:19,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:12:19,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:12:19,741 INFO L87 Difference]: Start difference. First operand 6712 states and 17665 transitions. Second operand has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:19,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:19,971 INFO L93 Difference]: Finished difference Result 7827 states and 19871 transitions. [2021-07-09 17:12:19,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:19,971 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:19,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:19,981 INFO L225 Difference]: With dead ends: 7827 [2021-07-09 17:12:19,981 INFO L226 Difference]: Without dead ends: 7773 [2021-07-09 17:12:19,981 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:12:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7773 states. [2021-07-09 17:12:20,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7773 to 6518. [2021-07-09 17:12:20,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6518 states, 6517 states have (on average 2.63265306122449) internal successors, (17157), 6517 states have internal predecessors, (17157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:20,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6518 states to 6518 states and 17157 transitions. [2021-07-09 17:12:20,077 INFO L78 Accepts]: Start accepts. Automaton has 6518 states and 17157 transitions. Word has length 47 [2021-07-09 17:12:20,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:20,077 INFO L482 AbstractCegarLoop]: Abstraction has 6518 states and 17157 transitions. [2021-07-09 17:12:20,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.8125) internal successors, (61), 15 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:20,077 INFO L276 IsEmpty]: Start isEmpty. Operand 6518 states and 17157 transitions. [2021-07-09 17:12:20,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:20,082 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:20,082 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:20,298 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:20,298 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:20,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:20,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1517458978, now seen corresponding path program 134 times [2021-07-09 17:12:20,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:20,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189316449] [2021-07-09 17:12:20,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:20,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:20,371 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:20,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189316449] [2021-07-09 17:12:20,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189316449] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:20,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470776067] [2021-07-09 17:12:20,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:20,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:20,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:20,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:20,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:20,472 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 45 proven. 52 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:20,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470776067] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:20,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:20,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:12:20,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047547985] [2021-07-09 17:12:20,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:12:20,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:20,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:12:20,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:20,473 INFO L87 Difference]: Start difference. First operand 6518 states and 17157 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:20,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:20,702 INFO L93 Difference]: Finished difference Result 8402 states and 21039 transitions. [2021-07-09 17:12:20,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:20,703 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:20,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:20,714 INFO L225 Difference]: With dead ends: 8402 [2021-07-09 17:12:20,714 INFO L226 Difference]: Without dead ends: 8402 [2021-07-09 17:12:20,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 104.6ms TimeCoverageRelationStatistics Valid=105, Invalid=167, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:12:20,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8402 states. [2021-07-09 17:12:20,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8402 to 6836. [2021-07-09 17:12:20,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6836 states, 6835 states have (on average 2.651207022677396) internal successors, (18121), 6835 states have internal predecessors, (18121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:20,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6836 states to 6836 states and 18121 transitions. [2021-07-09 17:12:20,812 INFO L78 Accepts]: Start accepts. Automaton has 6836 states and 18121 transitions. Word has length 47 [2021-07-09 17:12:20,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:20,813 INFO L482 AbstractCegarLoop]: Abstraction has 6836 states and 18121 transitions. [2021-07-09 17:12:20,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:20,813 INFO L276 IsEmpty]: Start isEmpty. Operand 6836 states and 18121 transitions. [2021-07-09 17:12:20,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:20,818 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:20,818 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:21,034 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable500,251 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:21,034 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:21,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:21,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1223920619, now seen corresponding path program 67 times [2021-07-09 17:12:21,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:21,034 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440744216] [2021-07-09 17:12:21,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:21,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:21,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:21,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440744216] [2021-07-09 17:12:21,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440744216] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:21,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611601346] [2021-07-09 17:12:21,116 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:21,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:21,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:21,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611601346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:21,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:21,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:12:21,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478445948] [2021-07-09 17:12:21,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:12:21,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:21,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:12:21,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:21,224 INFO L87 Difference]: Start difference. First operand 6836 states and 18121 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:21,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:21,710 INFO L93 Difference]: Finished difference Result 8432 states and 21485 transitions. [2021-07-09 17:12:21,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:12:21,710 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:21,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:21,725 INFO L225 Difference]: With dead ends: 8432 [2021-07-09 17:12:21,725 INFO L226 Difference]: Without dead ends: 8418 [2021-07-09 17:12:21,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 176.6ms TimeCoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:12:21,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8418 states. [2021-07-09 17:12:21,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8418 to 6863. [2021-07-09 17:12:21,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6862 states have (on average 2.652287962693092) internal successors, (18200), 6862 states have internal predecessors, (18200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:21,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18200 transitions. [2021-07-09 17:12:21,853 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18200 transitions. Word has length 47 [2021-07-09 17:12:21,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:21,854 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18200 transitions. [2021-07-09 17:12:21,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:21,854 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18200 transitions. [2021-07-09 17:12:21,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:21,860 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:21,860 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:22,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable501 [2021-07-09 17:12:22,077 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:22,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:22,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1400811563, now seen corresponding path program 135 times [2021-07-09 17:12:22,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:22,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301576194] [2021-07-09 17:12:22,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:22,161 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:22,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:22,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301576194] [2021-07-09 17:12:22,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301576194] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:22,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [495428837] [2021-07-09 17:12:22,162 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 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:22,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:12:22,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:22,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:22,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:22,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [495428837] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:22,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:22,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-07-09 17:12:22,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215269861] [2021-07-09 17:12:22,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:22,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:22,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:22,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:22,314 INFO L87 Difference]: Start difference. First operand 6863 states and 18200 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:22,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:22,679 INFO L93 Difference]: Finished difference Result 6912 states and 18275 transitions. [2021-07-09 17:12:22,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:22,679 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:22,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:22,691 INFO L225 Difference]: With dead ends: 6912 [2021-07-09 17:12:22,692 INFO L226 Difference]: Without dead ends: 6880 [2021-07-09 17:12:22,692 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:22,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6880 states. [2021-07-09 17:12:22,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6880 to 6863. [2021-07-09 17:12:22,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6863 states, 6862 states have (on average 2.6514135820460507) internal successors, (18194), 6862 states have internal predecessors, (18194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:22,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6863 states to 6863 states and 18194 transitions. [2021-07-09 17:12:22,806 INFO L78 Accepts]: Start accepts. Automaton has 6863 states and 18194 transitions. Word has length 47 [2021-07-09 17:12:22,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:22,806 INFO L482 AbstractCegarLoop]: Abstraction has 6863 states and 18194 transitions. [2021-07-09 17:12:22,806 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:22,806 INFO L276 IsEmpty]: Start isEmpty. Operand 6863 states and 18194 transitions. [2021-07-09 17:12:22,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:22,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:22,812 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:23,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable502 [2021-07-09 17:12:23,019 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:23,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:23,019 INFO L82 PathProgramCache]: Analyzing trace with hash 118327946, now seen corresponding path program 136 times [2021-07-09 17:12:23,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:23,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44893033] [2021-07-09 17:12:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:23,082 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 54 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:23,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44893033] [2021-07-09 17:12:23,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44893033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:23,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575923950] [2021-07-09 17:12:23,083 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 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:23,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:23,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:23,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:12:23,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:23,196 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 72 proven. 25 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:23,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575923950] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:23,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:23,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 17:12:23,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443723304] [2021-07-09 17:12:23,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:12:23,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:23,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:12:23,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:23,196 INFO L87 Difference]: Start difference. First operand 6863 states and 18194 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:23,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:23,433 INFO L93 Difference]: Finished difference Result 8816 states and 22216 transitions. [2021-07-09 17:12:23,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:12:23,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:23,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:23,448 INFO L225 Difference]: With dead ends: 8816 [2021-07-09 17:12:23,448 INFO L226 Difference]: Without dead ends: 8816 [2021-07-09 17:12:23,448 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=99, Invalid=141, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:12:23,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8816 states. [2021-07-09 17:12:23,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8816 to 7200. [2021-07-09 17:12:23,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7200 states, 7199 states have (on average 2.6677316293929714) internal successors, (19205), 7199 states have internal predecessors, (19205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7200 states to 7200 states and 19205 transitions. [2021-07-09 17:12:23,586 INFO L78 Accepts]: Start accepts. Automaton has 7200 states and 19205 transitions. Word has length 47 [2021-07-09 17:12:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:23,586 INFO L482 AbstractCegarLoop]: Abstraction has 7200 states and 19205 transitions. [2021-07-09 17:12:23,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 7200 states and 19205 transitions. [2021-07-09 17:12:23,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:23,592 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:23,592 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:23,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:23,797 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:23,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:23,797 INFO L82 PathProgramCache]: Analyzing trace with hash -652507721, now seen corresponding path program 68 times [2021-07-09 17:12:23,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:23,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752396242] [2021-07-09 17:12:23,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:23,873 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:23,873 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:23,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752396242] [2021-07-09 17:12:23,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752396242] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:23,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545964777] [2021-07-09 17:12:23,873 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 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:23,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:23,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:23,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:23,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:23,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545964777] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:23,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:23,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:12:23,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427352355] [2021-07-09 17:12:23,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:12:23,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:23,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:12:23,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:12:23,968 INFO L87 Difference]: Start difference. First operand 7200 states and 19205 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:24,313 INFO L93 Difference]: Finished difference Result 8160 states and 21168 transitions. [2021-07-09 17:12:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:12:24,313 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:24,323 INFO L225 Difference]: With dead ends: 8160 [2021-07-09 17:12:24,323 INFO L226 Difference]: Without dead ends: 8160 [2021-07-09 17:12:24,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:24,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8160 states. [2021-07-09 17:12:24,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8160 to 7218. [2021-07-09 17:12:24,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.668144658445337) internal successors, (19256), 7217 states have internal predecessors, (19256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:24,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19256 transitions. [2021-07-09 17:12:24,411 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19256 transitions. Word has length 47 [2021-07-09 17:12:24,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:24,411 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19256 transitions. [2021-07-09 17:12:24,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:24,412 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19256 transitions. [2021-07-09 17:12:24,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:24,417 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:24,417 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:24,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable506,255 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:24,632 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:24,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:24,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2009163191, now seen corresponding path program 137 times [2021-07-09 17:12:24,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:24,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579387919] [2021-07-09 17:12:24,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:24,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 14 proven. 81 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:24,743 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:24,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579387919] [2021-07-09 17:12:24,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579387919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:24,743 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608559159] [2021-07-09 17:12:24,743 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:24,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:12:24,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:24,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:24,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:24,887 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:24,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [608559159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:24,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:24,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-07-09 17:12:24,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121555338] [2021-07-09 17:12:24,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:12:24,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:24,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:12:24,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:24,888 INFO L87 Difference]: Start difference. First operand 7218 states and 19256 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:25,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:25,210 INFO L93 Difference]: Finished difference Result 7286 states and 19355 transitions. [2021-07-09 17:12:25,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:25,211 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:25,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:25,223 INFO L225 Difference]: With dead ends: 7286 [2021-07-09 17:12:25,223 INFO L226 Difference]: Without dead ends: 7266 [2021-07-09 17:12:25,223 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7266 states. [2021-07-09 17:12:25,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7266 to 7218. [2021-07-09 17:12:25,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.6677289732575864) internal successors, (19253), 7217 states have internal predecessors, (19253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:25,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19253 transitions. [2021-07-09 17:12:25,335 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19253 transitions. Word has length 47 [2021-07-09 17:12:25,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:25,335 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19253 transitions. [2021-07-09 17:12:25,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:25,335 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19253 transitions. [2021-07-09 17:12:25,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:25,341 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:25,341 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:25,557 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable507,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:25,558 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:25,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:25,558 INFO L82 PathProgramCache]: Analyzing trace with hash -732216406, now seen corresponding path program 69 times [2021-07-09 17:12:25,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:25,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086888052] [2021-07-09 17:12:25,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 42 proven. 55 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:25,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:25,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086888052] [2021-07-09 17:12:25,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086888052] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:25,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081200584] [2021-07-09 17:12:25,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:25,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:12:25,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:25,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:25,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:25,724 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 43 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:25,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081200584] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:25,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:25,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:12:25,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919954202] [2021-07-09 17:12:25,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:12:25,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:25,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:12:25,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:25,725 INFO L87 Difference]: Start difference. First operand 7218 states and 19253 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:25,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:25,887 INFO L93 Difference]: Finished difference Result 7894 states and 20581 transitions. [2021-07-09 17:12:25,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:25,887 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:25,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:25,897 INFO L225 Difference]: With dead ends: 7894 [2021-07-09 17:12:25,897 INFO L226 Difference]: Without dead ends: 7878 [2021-07-09 17:12:25,897 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 68.7ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:25,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7878 states. [2021-07-09 17:12:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7878 to 7218. [2021-07-09 17:12:25,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7218 states, 7217 states have (on average 2.6667590411528335) internal successors, (19246), 7217 states have internal predecessors, (19246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:25,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7218 states to 7218 states and 19246 transitions. [2021-07-09 17:12:25,989 INFO L78 Accepts]: Start accepts. Automaton has 7218 states and 19246 transitions. Word has length 47 [2021-07-09 17:12:25,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:25,989 INFO L482 AbstractCegarLoop]: Abstraction has 7218 states and 19246 transitions. [2021-07-09 17:12:25,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:25,989 INFO L276 IsEmpty]: Start isEmpty. Operand 7218 states and 19246 transitions. [2021-07-09 17:12:25,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:25,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:25,994 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:26,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable508,257 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:26,210 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:26,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:26,211 INFO L82 PathProgramCache]: Analyzing trace with hash 330606421, now seen corresponding path program 70 times [2021-07-09 17:12:26,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:26,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964015264] [2021-07-09 17:12:26,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:26,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:26,279 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:26,280 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:26,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964015264] [2021-07-09 17:12:26,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964015264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:26,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329101253] [2021-07-09 17:12:26,280 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 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:26,308 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:26,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:26,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:26,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:26,379 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 6 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:26,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329101253] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:26,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:26,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:12:26,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582422363] [2021-07-09 17:12:26,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:26,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:26,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:26,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:26,380 INFO L87 Difference]: Start difference. First operand 7218 states and 19246 transitions. Second operand has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:26,782 INFO L93 Difference]: Finished difference Result 7863 states and 20502 transitions. [2021-07-09 17:12:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:26,782 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:26,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:26,792 INFO L225 Difference]: With dead ends: 7863 [2021-07-09 17:12:26,792 INFO L226 Difference]: Without dead ends: 7855 [2021-07-09 17:12:26,792 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:26,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7855 states. [2021-07-09 17:12:26,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7855 to 7285. [2021-07-09 17:12:26,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7285 states, 7284 states have (on average 2.6633717737506863) internal successors, (19400), 7284 states have internal predecessors, (19400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:26,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7285 states to 7285 states and 19400 transitions. [2021-07-09 17:12:26,935 INFO L78 Accepts]: Start accepts. Automaton has 7285 states and 19400 transitions. Word has length 47 [2021-07-09 17:12:26,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:26,935 INFO L482 AbstractCegarLoop]: Abstraction has 7285 states and 19400 transitions. [2021-07-09 17:12:26,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.8) internal successors, (48), 9 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:26,935 INFO L276 IsEmpty]: Start isEmpty. Operand 7285 states and 19400 transitions. [2021-07-09 17:12:26,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:26,941 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:26,941 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:27,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 258 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable512 [2021-07-09 17:12:27,157 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:27,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:27,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1830939413, now seen corresponding path program 138 times [2021-07-09 17:12:27,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:27,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568834772] [2021-07-09 17:12:27,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:27,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:27,219 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 15 proven. 80 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:27,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:27,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568834772] [2021-07-09 17:12:27,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568834772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:27,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1770648423] [2021-07-09 17:12:27,220 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 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:27,248 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:12:27,248 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:27,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:27,249 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:27,329 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 11 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:27,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1770648423] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:27,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:27,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-07-09 17:12:27,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106416174] [2021-07-09 17:12:27,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:27,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:27,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:27,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:27,330 INFO L87 Difference]: Start difference. First operand 7285 states and 19400 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) [2021-07-09 17:12:27,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:27,780 INFO L93 Difference]: Finished difference Result 7653 states and 20013 transitions. [2021-07-09 17:12:27,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:27,780 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.2) internal successors, (52), 9 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:27,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:27,790 INFO L225 Difference]: With dead ends: 7653 [2021-07-09 17:12:27,790 INFO L226 Difference]: Without dead ends: 7538 [2021-07-09 17:12:27,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:27,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7538 states. [2021-07-09 17:12:27,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7538 to 7173. [2021-07-09 17:12:27,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7173 states, 7172 states have (on average 2.668293363078639) internal successors, (19137), 7172 states have internal predecessors, (19137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:27,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7173 states to 7173 states and 19137 transitions. [2021-07-09 17:12:27,876 INFO L78 Accepts]: Start accepts. Automaton has 7173 states and 19137 transitions. Word has length 47 [2021-07-09 17:12:27,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:27,877 INFO L482 AbstractCegarLoop]: Abstraction has 7173 states and 19137 transitions. [2021-07-09 17:12:27,877 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) [2021-07-09 17:12:27,877 INFO L276 IsEmpty]: Start isEmpty. Operand 7173 states and 19137 transitions. [2021-07-09 17:12:27,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:27,881 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:27,881 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:28,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable513 [2021-07-09 17:12:28,097 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:28,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:28,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1217403233, now seen corresponding path program 139 times [2021-07-09 17:12:28,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:28,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438420372] [2021-07-09 17:12:28,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:28,166 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 81 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:28,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:28,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438420372] [2021-07-09 17:12:28,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438420372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:28,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1996928886] [2021-07-09 17:12:28,167 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 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:28,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:28,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 82 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:12:28,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1996928886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:28,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:28,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-07-09 17:12:28,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874419771] [2021-07-09 17:12:28,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:28,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:28,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:28,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:28,260 INFO L87 Difference]: Start difference. First operand 7173 states and 19137 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:28,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:28,561 INFO L93 Difference]: Finished difference Result 7696 states and 20154 transitions. [2021-07-09 17:12:28,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:12:28,562 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:28,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:28,572 INFO L225 Difference]: With dead ends: 7696 [2021-07-09 17:12:28,572 INFO L226 Difference]: Without dead ends: 7684 [2021-07-09 17:12:28,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 49 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 104.5ms TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7684 states. [2021-07-09 17:12:28,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7684 to 7175. [2021-07-09 17:12:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7175 states, 7174 states have (on average 2.6681070532478395) internal successors, (19141), 7174 states have internal predecessors, (19141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7175 states to 7175 states and 19141 transitions. [2021-07-09 17:12:28,662 INFO L78 Accepts]: Start accepts. Automaton has 7175 states and 19141 transitions. Word has length 47 [2021-07-09 17:12:28,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:28,662 INFO L482 AbstractCegarLoop]: Abstraction has 7175 states and 19141 transitions. [2021-07-09 17:12:28,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:28,662 INFO L276 IsEmpty]: Start isEmpty. Operand 7175 states and 19141 transitions. [2021-07-09 17:12:28,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:28,667 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:28,667 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:28,883 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable514,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:28,883 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:28,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:28,883 INFO L82 PathProgramCache]: Analyzing trace with hash -430954270, now seen corresponding path program 140 times [2021-07-09 17:12:28,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:28,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876394153] [2021-07-09 17:12:28,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:28,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:28,937 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:28,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:28,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876394153] [2021-07-09 17:12:28,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876394153] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:28,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573646635] [2021-07-09 17:12:28,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:28,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:28,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:28,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:28,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 40 proven. 58 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:29,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573646635] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:29,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:29,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:12:29,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963160396] [2021-07-09 17:12:29,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:12:29,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:29,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:12:29,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:12:29,028 INFO L87 Difference]: Start difference. First operand 7175 states and 19141 transitions. Second operand has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:29,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:29,145 INFO L93 Difference]: Finished difference Result 8501 states and 21546 transitions. [2021-07-09 17:12:29,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:12:29,145 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:29,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:29,156 INFO L225 Difference]: With dead ends: 8501 [2021-07-09 17:12:29,156 INFO L226 Difference]: Without dead ends: 8495 [2021-07-09 17:12:29,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 50.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:12:29,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8495 states. [2021-07-09 17:12:29,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8495 to 7174. [2021-07-09 17:12:29,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7174 states, 7173 states have (on average 2.6675031367628605) internal successors, (19134), 7173 states have internal predecessors, (19134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:29,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7174 states to 7174 states and 19134 transitions. [2021-07-09 17:12:29,270 INFO L78 Accepts]: Start accepts. Automaton has 7174 states and 19134 transitions. Word has length 47 [2021-07-09 17:12:29,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:29,270 INFO L482 AbstractCegarLoop]: Abstraction has 7174 states and 19134 transitions. [2021-07-09 17:12:29,270 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.7) internal successors, (47), 9 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:29,270 INFO L276 IsEmpty]: Start isEmpty. Operand 7174 states and 19134 transitions. [2021-07-09 17:12:29,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:29,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:29,275 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:29,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable515,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:29,491 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:29,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:29,491 INFO L82 PathProgramCache]: Analyzing trace with hash -935646729, now seen corresponding path program 141 times [2021-07-09 17:12:29,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:29,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873537839] [2021-07-09 17:12:29,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:29,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:29,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873537839] [2021-07-09 17:12:29,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873537839] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:29,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603947720] [2021-07-09 17:12:29,560 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 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:29,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:12:29,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:29,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:29,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:29,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [603947720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:29,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:29,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:12:29,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509222664] [2021-07-09 17:12:29,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:12:29,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:29,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:12:29,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:12:29,657 INFO L87 Difference]: Start difference. First operand 7174 states and 19134 transitions. Second operand has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:30,158 INFO L93 Difference]: Finished difference Result 8738 states and 22335 transitions. [2021-07-09 17:12:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:12:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:30,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:30,170 INFO L225 Difference]: With dead ends: 8738 [2021-07-09 17:12:30,170 INFO L226 Difference]: Without dead ends: 8684 [2021-07-09 17:12:30,170 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=105, Invalid=597, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:12:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8684 states. [2021-07-09 17:12:30,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8684 to 7281. [2021-07-09 17:12:30,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 2.6664835164835163) internal successors, (19412), 7280 states have internal predecessors, (19412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:30,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19412 transitions. [2021-07-09 17:12:30,277 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19412 transitions. Word has length 47 [2021-07-09 17:12:30,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:30,277 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19412 transitions. [2021-07-09 17:12:30,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.363636363636363) internal successors, (48), 10 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19412 transitions. [2021-07-09 17:12:30,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:30,283 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:30,283 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:30,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable518,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:30,499 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:30,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:30,499 INFO L82 PathProgramCache]: Analyzing trace with hash 596912380, now seen corresponding path program 142 times [2021-07-09 17:12:30,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:30,499 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155227660] [2021-07-09 17:12:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:30,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:30,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:30,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155227660] [2021-07-09 17:12:30,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155227660] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:30,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005445163] [2021-07-09 17:12:30,561 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 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:30,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:30,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:30,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:30,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:30,650 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 36 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:30,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005445163] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:30,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:30,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:12:30,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946147025] [2021-07-09 17:12:30,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:12:30,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:30,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:12:30,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:12:30,651 INFO L87 Difference]: Start difference. First operand 7281 states and 19412 transitions. Second operand has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:30,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:30,791 INFO L93 Difference]: Finished difference Result 8660 states and 21915 transitions. [2021-07-09 17:12:30,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:12:30,791 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:30,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:30,803 INFO L225 Difference]: With dead ends: 8660 [2021-07-09 17:12:30,803 INFO L226 Difference]: Without dead ends: 8642 [2021-07-09 17:12:30,803 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 65.9ms TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:30,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8642 states. [2021-07-09 17:12:30,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8642 to 7281. [2021-07-09 17:12:30,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7281 states, 7280 states have (on average 2.665521978021978) internal successors, (19405), 7280 states have internal predecessors, (19405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7281 states to 7281 states and 19405 transitions. [2021-07-09 17:12:30,907 INFO L78 Accepts]: Start accepts. Automaton has 7281 states and 19405 transitions. Word has length 47 [2021-07-09 17:12:30,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:30,908 INFO L482 AbstractCegarLoop]: Abstraction has 7281 states and 19405 transitions. [2021-07-09 17:12:30,908 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.2727272727272725) internal successors, (47), 10 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:30,908 INFO L276 IsEmpty]: Start isEmpty. Operand 7281 states and 19405 transitions. [2021-07-09 17:12:30,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:30,912 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:30,912 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:31,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,263 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:31,128 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:31,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:31,128 INFO L82 PathProgramCache]: Analyzing trace with hash -780810195, now seen corresponding path program 143 times [2021-07-09 17:12:31,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:31,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405599674] [2021-07-09 17:12:31,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:31,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:31,201 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:31,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:31,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405599674] [2021-07-09 17:12:31,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405599674] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:31,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549957354] [2021-07-09 17:12:31,202 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 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:31,230 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:12:31,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:31,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:31,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:31,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549957354] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:31,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:31,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:12:31,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185143119] [2021-07-09 17:12:31,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:12:31,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:31,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:12:31,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:31,302 INFO L87 Difference]: Start difference. First operand 7281 states and 19405 transitions. Second operand has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:32,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:32,133 INFO L93 Difference]: Finished difference Result 11178 states and 27510 transitions. [2021-07-09 17:12:32,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-09 17:12:32,134 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:32,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:32,149 INFO L225 Difference]: With dead ends: 11178 [2021-07-09 17:12:32,149 INFO L226 Difference]: Without dead ends: 11010 [2021-07-09 17:12:32,150 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 434.0ms TimeCoverageRelationStatistics Valid=267, Invalid=1895, Unknown=0, NotChecked=0, Total=2162 [2021-07-09 17:12:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11010 states. [2021-07-09 17:12:32,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11010 to 7582. [2021-07-09 17:12:32,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.6559820604141935) internal successors, (20135), 7581 states have internal predecessors, (20135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:32,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20135 transitions. [2021-07-09 17:12:32,274 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20135 transitions. Word has length 47 [2021-07-09 17:12:32,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:32,274 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20135 transitions. [2021-07-09 17:12:32,274 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.0) internal successors, (48), 11 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:32,274 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20135 transitions. [2021-07-09 17:12:32,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:32,279 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:32,279 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:32,495 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable523 [2021-07-09 17:12:32,495 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:32,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:32,495 INFO L82 PathProgramCache]: Analyzing trace with hash -394207518, now seen corresponding path program 144 times [2021-07-09 17:12:32,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:32,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208344353] [2021-07-09 17:12:32,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:32,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:32,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208344353] [2021-07-09 17:12:32,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208344353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:32,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242261092] [2021-07-09 17:12:32,564 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 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:32,592 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:12:32,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:32,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:32,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:32,658 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 31 proven. 67 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:32,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242261092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:32,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:32,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:12:32,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867155019] [2021-07-09 17:12:32,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:12:32,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:32,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:12:32,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:12:32,659 INFO L87 Difference]: Start difference. First operand 7582 states and 20135 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:32,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:32,825 INFO L93 Difference]: Finished difference Result 9069 states and 22840 transitions. [2021-07-09 17:12:32,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:12:32,825 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:32,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:32,837 INFO L225 Difference]: With dead ends: 9069 [2021-07-09 17:12:32,837 INFO L226 Difference]: Without dead ends: 9042 [2021-07-09 17:12:32,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 80.8ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:32,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9042 states. [2021-07-09 17:12:32,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9042 to 7582. [2021-07-09 17:12:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.6555863342566943) internal successors, (20132), 7581 states have internal predecessors, (20132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 20132 transitions. [2021-07-09 17:12:32,946 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 20132 transitions. Word has length 47 [2021-07-09 17:12:32,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:32,946 INFO L482 AbstractCegarLoop]: Abstraction has 7582 states and 20132 transitions. [2021-07-09 17:12:32,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:32,946 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 20132 transitions. [2021-07-09 17:12:32,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:32,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:32,951 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:33,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable524 [2021-07-09 17:12:33,167 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:33,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:33,167 INFO L82 PathProgramCache]: Analyzing trace with hash -840501705, now seen corresponding path program 145 times [2021-07-09 17:12:33,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:33,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428499462] [2021-07-09 17:12:33,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:33,252 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:33,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:33,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428499462] [2021-07-09 17:12:33,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428499462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:33,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677336244] [2021-07-09 17:12:33,252 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 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:33,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:33,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 28 conjunts are in the unsatisfiable core [2021-07-09 17:12:33,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:33,403 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:12:33,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:12:33,404 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:12:33,406 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:12:33,406 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:12:33,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:12:33,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:12:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 16 proven. 79 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:33,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677336244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:33,413 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:33,413 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-09 17:12:33,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678503287] [2021-07-09 17:12:33,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:12:33,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:33,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:12:33,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=231, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:12:33,413 INFO L87 Difference]: Start difference. First operand 7582 states and 20132 transitions. Second operand has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-07-09 17:12:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:34,804 INFO L93 Difference]: Finished difference Result 16993 states and 39932 transitions. [2021-07-09 17:12:34,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-09 17:12:34,804 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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 47 [2021-07-09 17:12:34,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:34,829 INFO L225 Difference]: With dead ends: 16993 [2021-07-09 17:12:34,829 INFO L226 Difference]: Without dead ends: 16471 [2021-07-09 17:12:34,830 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2193 ImplicationChecksByTransitivity, 883.7ms TimeCoverageRelationStatistics Valid=645, Invalid=5517, Unknown=0, NotChecked=0, Total=6162 [2021-07-09 17:12:34,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16471 states. [2021-07-09 17:12:34,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16471 to 8142. [2021-07-09 17:12:34,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8142 states, 8141 states have (on average 2.6381279941039186) internal successors, (21477), 8141 states have internal predecessors, (21477), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:34,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21477 transitions. [2021-07-09 17:12:34,987 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21477 transitions. Word has length 47 [2021-07-09 17:12:34,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:34,987 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21477 transitions. [2021-07-09 17:12:34,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.2941176470588234) internal successors, (56), 16 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) [2021-07-09 17:12:34,987 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21477 transitions. [2021-07-09 17:12:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:34,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:34,993 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:35,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-07-09 17:12:35,209 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:35,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:35,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1053071164, now seen corresponding path program 146 times [2021-07-09 17:12:35,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:35,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081280936] [2021-07-09 17:12:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:35,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:35,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:35,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081280936] [2021-07-09 17:12:35,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081280936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:35,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551829166] [2021-07-09 17:12:35,288 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 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:35,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:35,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:35,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:35,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:35,385 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 32 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:35,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551829166] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:35,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:35,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:12:35,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632825034] [2021-07-09 17:12:35,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:12:35,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:35,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:12:35,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:12:35,386 INFO L87 Difference]: Start difference. First operand 8142 states and 21477 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:35,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:35,581 INFO L93 Difference]: Finished difference Result 9828 states and 24560 transitions. [2021-07-09 17:12:35,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:12:35,581 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:35,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:35,596 INFO L225 Difference]: With dead ends: 9828 [2021-07-09 17:12:35,596 INFO L226 Difference]: Without dead ends: 9792 [2021-07-09 17:12:35,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 102.2ms TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:12:35,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9792 states. [2021-07-09 17:12:35,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9792 to 8142. [2021-07-09 17:12:35,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8142 states, 8141 states have (on average 2.637759489006265) internal successors, (21474), 8141 states have internal predecessors, (21474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:35,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8142 states to 8142 states and 21474 transitions. [2021-07-09 17:12:35,722 INFO L78 Accepts]: Start accepts. Automaton has 8142 states and 21474 transitions. Word has length 47 [2021-07-09 17:12:35,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:35,722 INFO L482 AbstractCegarLoop]: Abstraction has 8142 states and 21474 transitions. [2021-07-09 17:12:35,722 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 8142 states and 21474 transitions. [2021-07-09 17:12:35,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:35,727 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:35,727 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:35,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable530 [2021-07-09 17:12:35,943 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:35,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:35,943 INFO L82 PathProgramCache]: Analyzing trace with hash -993815571, now seen corresponding path program 147 times [2021-07-09 17:12:35,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:35,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984467091] [2021-07-09 17:12:35,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:35,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 13 proven. 82 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:36,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:36,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984467091] [2021-07-09 17:12:36,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984467091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:36,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444322886] [2021-07-09 17:12:36,037 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 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:36,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:12:36,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:36,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:36,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:36,133 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 83 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:36,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444322886] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:36,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:36,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:12:36,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386469415] [2021-07-09 17:12:36,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:36,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:36,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:36,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:36,134 INFO L87 Difference]: Start difference. First operand 8142 states and 21474 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:38,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:38,343 INFO L93 Difference]: Finished difference Result 19383 states and 45637 transitions. [2021-07-09 17:12:38,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-07-09 17:12:38,343 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:38,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:38,372 INFO L225 Difference]: With dead ends: 19383 [2021-07-09 17:12:38,372 INFO L226 Difference]: Without dead ends: 18765 [2021-07-09 17:12:38,374 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6450 ImplicationChecksByTransitivity, 1616.6ms TimeCoverageRelationStatistics Valid=1455, Invalid=14547, Unknown=0, NotChecked=0, Total=16002 [2021-07-09 17:12:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18765 states. [2021-07-09 17:12:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18765 to 8971. [2021-07-09 17:12:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8971 states, 8970 states have (on average 2.618283166109253) internal successors, (23486), 8970 states have internal predecessors, (23486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:38,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23486 transitions. [2021-07-09 17:12:38,617 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23486 transitions. Word has length 47 [2021-07-09 17:12:38,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:38,617 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23486 transitions. [2021-07-09 17:12:38,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:38,617 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23486 transitions. [2021-07-09 17:12:38,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:38,623 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:38,623 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:38,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable536 [2021-07-09 17:12:38,839 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:38,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:38,840 INFO L82 PathProgramCache]: Analyzing trace with hash -244397918, now seen corresponding path program 148 times [2021-07-09 17:12:38,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:38,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408296283] [2021-07-09 17:12:38,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:38,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:38,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408296283] [2021-07-09 17:12:38,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408296283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:38,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091184352] [2021-07-09 17:12:38,930 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 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:38,956 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:38,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:38,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:38,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:39,026 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 39 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:39,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091184352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:39,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:39,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:12:39,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762242251] [2021-07-09 17:12:39,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:39,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:39,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:39,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:39,027 INFO L87 Difference]: Start difference. First operand 8971 states and 23486 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:39,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:39,278 INFO L93 Difference]: Finished difference Result 11009 states and 27233 transitions. [2021-07-09 17:12:39,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:12:39,279 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:39,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:39,293 INFO L225 Difference]: With dead ends: 11009 [2021-07-09 17:12:39,294 INFO L226 Difference]: Without dead ends: 10964 [2021-07-09 17:12:39,294 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:39,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10964 states. [2021-07-09 17:12:39,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10964 to 8971. [2021-07-09 17:12:39,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8971 states, 8970 states have (on average 2.617948717948718) internal successors, (23483), 8970 states have internal predecessors, (23483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:39,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8971 states to 8971 states and 23483 transitions. [2021-07-09 17:12:39,425 INFO L78 Accepts]: Start accepts. Automaton has 8971 states and 23483 transitions. Word has length 47 [2021-07-09 17:12:39,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:39,425 INFO L482 AbstractCegarLoop]: Abstraction has 8971 states and 23483 transitions. [2021-07-09 17:12:39,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:39,425 INFO L276 IsEmpty]: Start isEmpty. Operand 8971 states and 23483 transitions. [2021-07-09 17:12:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:39,431 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:39,431 INFO L508 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:39,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-07-09 17:12:39,647 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:39,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:39,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1478005367, now seen corresponding path program 149 times [2021-07-09 17:12:39,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:39,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686263523] [2021-07-09 17:12:39,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:39,756 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:39,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686263523] [2021-07-09 17:12:39,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686263523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:39,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158405781] [2021-07-09 17:12:39,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:39,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:12:39,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:39,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:12:39,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:39,853 INFO L134 CoverageAnalysis]: Checked inductivity of 97 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:39,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158405781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:39,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:39,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:12:39,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869186015] [2021-07-09 17:12:39,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:12:39,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:39,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:12:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:39,853 INFO L87 Difference]: Start difference. First operand 8971 states and 23483 transitions. Second operand has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:40,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:40,438 INFO L93 Difference]: Finished difference Result 11682 states and 28568 transitions. [2021-07-09 17:12:40,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:12:40,439 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:40,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:40,453 INFO L225 Difference]: With dead ends: 11682 [2021-07-09 17:12:40,453 INFO L226 Difference]: Without dead ends: 10842 [2021-07-09 17:12:40,453 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:12:40,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10842 states. [2021-07-09 17:12:40,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10842 to 6870. [2021-07-09 17:12:40,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6870 states, 6869 states have (on average 2.6869995632552044) internal successors, (18457), 6869 states have internal predecessors, (18457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6870 states to 6870 states and 18457 transitions. [2021-07-09 17:12:40,554 INFO L78 Accepts]: Start accepts. Automaton has 6870 states and 18457 transitions. Word has length 47 [2021-07-09 17:12:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:40,554 INFO L482 AbstractCegarLoop]: Abstraction has 6870 states and 18457 transitions. [2021-07-09 17:12:40,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.2666666666666666) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 6870 states and 18457 transitions. [2021-07-09 17:12:40,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:40,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:40,559 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:40,775 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable544,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:40,775 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:40,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:40,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1239943850, now seen corresponding path program 71 times [2021-07-09 17:12:40,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:40,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491313697] [2021-07-09 17:12:40,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:40,830 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:40,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:40,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491313697] [2021-07-09 17:12:40,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491313697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:40,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509457702] [2021-07-09 17:12:40,830 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:40,861 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:12:40,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:40,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:40,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:40,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509457702] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:40,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:40,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 16 [2021-07-09 17:12:40,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971198652] [2021-07-09 17:12:40,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:12:40,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:40,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:12:40,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:12:40,958 INFO L87 Difference]: Start difference. First operand 6870 states and 18457 transitions. Second operand has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:41,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:41,239 INFO L93 Difference]: Finished difference Result 8334 states and 21563 transitions. [2021-07-09 17:12:41,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:12:41,239 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:41,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:41,251 INFO L225 Difference]: With dead ends: 8334 [2021-07-09 17:12:41,251 INFO L226 Difference]: Without dead ends: 8318 [2021-07-09 17:12:41,251 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:12:41,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8318 states. [2021-07-09 17:12:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8318 to 7293. [2021-07-09 17:12:41,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7293 states, 7292 states have (on average 2.686368623148656) internal successors, (19589), 7292 states have internal predecessors, (19589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:41,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7293 states to 7293 states and 19589 transitions. [2021-07-09 17:12:41,380 INFO L78 Accepts]: Start accepts. Automaton has 7293 states and 19589 transitions. Word has length 47 [2021-07-09 17:12:41,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:41,380 INFO L482 AbstractCegarLoop]: Abstraction has 7293 states and 19589 transitions. [2021-07-09 17:12:41,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.411764705882353) internal successors, (75), 16 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:41,380 INFO L276 IsEmpty]: Start isEmpty. Operand 7293 states and 19589 transitions. [2021-07-09 17:12:41,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:41,387 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:41,387 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:41,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 271 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-07-09 17:12:41,589 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:41,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:41,589 INFO L82 PathProgramCache]: Analyzing trace with hash 618063440, now seen corresponding path program 72 times [2021-07-09 17:12:41,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:41,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040760971] [2021-07-09 17:12:41,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:41,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:41,646 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:41,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:41,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040760971] [2021-07-09 17:12:41,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040760971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:41,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863124721] [2021-07-09 17:12:41,647 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:41,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:12:41,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:41,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:41,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 67 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:41,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863124721] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:41,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:41,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 10 [2021-07-09 17:12:41,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615883739] [2021-07-09 17:12:41,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:12:41,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:41,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:12:41,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:12:41,754 INFO L87 Difference]: Start difference. First operand 7293 states and 19589 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:41,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:41,958 INFO L93 Difference]: Finished difference Result 8900 states and 22808 transitions. [2021-07-09 17:12:41,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:12:41,959 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:41,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:41,974 INFO L225 Difference]: With dead ends: 8900 [2021-07-09 17:12:41,974 INFO L226 Difference]: Without dead ends: 8900 [2021-07-09 17:12:41,974 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 95.4ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:12:41,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8900 states. [2021-07-09 17:12:42,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8900 to 7296. [2021-07-09 17:12:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7296 states, 7295 states have (on average 2.6864976010966415) internal successors, (19598), 7295 states have internal predecessors, (19598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:42,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7296 states to 7296 states and 19598 transitions. [2021-07-09 17:12:42,107 INFO L78 Accepts]: Start accepts. Automaton has 7296 states and 19598 transitions. Word has length 47 [2021-07-09 17:12:42,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:42,107 INFO L482 AbstractCegarLoop]: Abstraction has 7296 states and 19598 transitions. [2021-07-09 17:12:42,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:42,107 INFO L276 IsEmpty]: Start isEmpty. Operand 7296 states and 19598 transitions. [2021-07-09 17:12:42,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:42,112 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:42,112 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:42,328 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:42,328 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:42,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:42,328 INFO L82 PathProgramCache]: Analyzing trace with hash -1019509016, now seen corresponding path program 73 times [2021-07-09 17:12:42,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:42,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671804441] [2021-07-09 17:12:42,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 68 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:42,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:42,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671804441] [2021-07-09 17:12:42,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671804441] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:42,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105868701] [2021-07-09 17:12:42,393 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:42,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:42,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:12:42,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:42,543 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 69 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:12:42,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105868701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:42,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:42,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-07-09 17:12:42,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303105706] [2021-07-09 17:12:42,543 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:12:42,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:42,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:12:42,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:12:42,544 INFO L87 Difference]: Start difference. First operand 7296 states and 19598 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:42,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:42,924 INFO L93 Difference]: Finished difference Result 8356 states and 21589 transitions. [2021-07-09 17:12:42,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:12:42,925 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:42,936 INFO L225 Difference]: With dead ends: 8356 [2021-07-09 17:12:42,936 INFO L226 Difference]: Without dead ends: 8356 [2021-07-09 17:12:42,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 212.0ms TimeCoverageRelationStatistics Valid=246, Invalid=404, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:12:42,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8356 states. [2021-07-09 17:12:43,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8356 to 7143. [2021-07-09 17:12:43,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7143 states, 7142 states have (on average 2.690422850742089) internal successors, (19215), 7142 states have internal predecessors, (19215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:43,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7143 states to 7143 states and 19215 transitions. [2021-07-09 17:12:43,036 INFO L78 Accepts]: Start accepts. Automaton has 7143 states and 19215 transitions. Word has length 47 [2021-07-09 17:12:43,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:43,036 INFO L482 AbstractCegarLoop]: Abstraction has 7143 states and 19215 transitions. [2021-07-09 17:12:43,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:43,036 INFO L276 IsEmpty]: Start isEmpty. Operand 7143 states and 19215 transitions. [2021-07-09 17:12:43,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-07-09 17:12:43,041 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:43,041 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:43,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable548,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:43,257 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:43,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:43,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1559844220, now seen corresponding path program 150 times [2021-07-09 17:12:43,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:43,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714524953] [2021-07-09 17:12:43,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:43,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:43,360 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:43,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:43,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714524953] [2021-07-09 17:12:43,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714524953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:43,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284440676] [2021-07-09 17:12:43,360 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 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:43,392 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-07-09 17:12:43,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:43,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-09 17:12:43,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:43,464 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 53 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:43,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284440676] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:43,465 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:43,465 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:12:43,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833695603] [2021-07-09 17:12:43,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:12:43,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:43,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:12:43,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:12:43,465 INFO L87 Difference]: Start difference. First operand 7143 states and 19215 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:43,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:43,689 INFO L93 Difference]: Finished difference Result 8410 states and 21506 transitions. [2021-07-09 17:12:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:12:43,689 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-07-09 17:12:43,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:43,700 INFO L225 Difference]: With dead ends: 8410 [2021-07-09 17:12:43,700 INFO L226 Difference]: Without dead ends: 8354 [2021-07-09 17:12:43,700 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 147.7ms TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:12:43,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8354 states. [2021-07-09 17:12:43,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8354 to 7152. [2021-07-09 17:12:43,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7152 states, 7151 states have (on average 2.6889945462173124) internal successors, (19229), 7151 states have internal predecessors, (19229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:43,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7152 states to 7152 states and 19229 transitions. [2021-07-09 17:12:43,799 INFO L78 Accepts]: Start accepts. Automaton has 7152 states and 19229 transitions. Word has length 47 [2021-07-09 17:12:43,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:43,799 INFO L482 AbstractCegarLoop]: Abstraction has 7152 states and 19229 transitions. [2021-07-09 17:12:43,799 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:43,799 INFO L276 IsEmpty]: Start isEmpty. Operand 7152 states and 19229 transitions. [2021-07-09 17:12:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 17:12:43,804 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:43,804 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:44,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable551,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:44,020 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:44,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:44,020 INFO L82 PathProgramCache]: Analyzing trace with hash -2086787547, now seen corresponding path program 151 times [2021-07-09 17:12:44,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:44,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850498387] [2021-07-09 17:12:44,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:44,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:44,073 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 113 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:12:44,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:44,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850498387] [2021-07-09 17:12:44,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850498387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:44,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177647349] [2021-07-09 17:12:44,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:44,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:44,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-09 17:12:44,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 51 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:44,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177647349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:44,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:44,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 15] total 22 [2021-07-09 17:12:44,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803249554] [2021-07-09 17:12:44,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:12:44,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:44,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:12:44,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:12:44,358 INFO L87 Difference]: Start difference. First operand 7152 states and 19229 transitions. Second operand has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:45,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:45,665 INFO L93 Difference]: Finished difference Result 9713 states and 24252 transitions. [2021-07-09 17:12:45,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-07-09 17:12:45,665 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-09 17:12:45,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:45,679 INFO L225 Difference]: With dead ends: 9713 [2021-07-09 17:12:45,679 INFO L226 Difference]: Without dead ends: 9671 [2021-07-09 17:12:45,680 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 684 ImplicationChecksByTransitivity, 700.4ms TimeCoverageRelationStatistics Valid=620, Invalid=2460, Unknown=0, NotChecked=0, Total=3080 [2021-07-09 17:12:45,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9671 states. [2021-07-09 17:12:45,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9671 to 7802. [2021-07-09 17:12:45,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7802 states, 7801 states have (on average 2.6345340340981926) internal successors, (20552), 7801 states have internal predecessors, (20552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7802 states to 7802 states and 20552 transitions. [2021-07-09 17:12:45,809 INFO L78 Accepts]: Start accepts. Automaton has 7802 states and 20552 transitions. Word has length 50 [2021-07-09 17:12:45,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:45,809 INFO L482 AbstractCegarLoop]: Abstraction has 7802 states and 20552 transitions. [2021-07-09 17:12:45,809 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 4.304347826086956) internal successors, (99), 22 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 7802 states and 20552 transitions. [2021-07-09 17:12:45,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 17:12:45,815 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:45,815 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:46,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,275 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:46,031 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:46,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:46,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1860539001, now seen corresponding path program 152 times [2021-07-09 17:12:46,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:46,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324720781] [2021-07-09 17:12:46,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:46,084 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:12:46,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:46,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324720781] [2021-07-09 17:12:46,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1324720781] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:46,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143742905] [2021-07-09 17:12:46,084 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 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:46,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:46,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:46,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:46,172 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:12:46,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143742905] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:46,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:46,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:12:46,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135043775] [2021-07-09 17:12:46,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:46,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:46,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:46,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:46,173 INFO L87 Difference]: Start difference. First operand 7802 states and 20552 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:46,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:46,427 INFO L93 Difference]: Finished difference Result 8830 states and 22462 transitions. [2021-07-09 17:12:46,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:12:46,427 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-09 17:12:46,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:46,441 INFO L225 Difference]: With dead ends: 8830 [2021-07-09 17:12:46,441 INFO L226 Difference]: Without dead ends: 8773 [2021-07-09 17:12:46,441 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:46,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8773 states. [2021-07-09 17:12:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8773 to 7820. [2021-07-09 17:12:46,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7820 states, 7819 states have (on average 2.632945389435989) internal successors, (20587), 7819 states have internal predecessors, (20587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:46,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7820 states to 7820 states and 20587 transitions. [2021-07-09 17:12:46,564 INFO L78 Accepts]: Start accepts. Automaton has 7820 states and 20587 transitions. Word has length 50 [2021-07-09 17:12:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:46,564 INFO L482 AbstractCegarLoop]: Abstraction has 7820 states and 20587 transitions. [2021-07-09 17:12:46,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:46,565 INFO L276 IsEmpty]: Start isEmpty. Operand 7820 states and 20587 transitions. [2021-07-09 17:12:46,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 17:12:46,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:46,570 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:46,785 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,276 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:46,786 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:46,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:46,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1761499875, now seen corresponding path program 153 times [2021-07-09 17:12:46,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:46,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680662147] [2021-07-09 17:12:46,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:12:46,839 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680662147] [2021-07-09 17:12:46,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680662147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:46,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94371855] [2021-07-09 17:12:46,840 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:46,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:12:46,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:46,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:46,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:46,931 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:12:46,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94371855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:46,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:46,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:12:46,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815893162] [2021-07-09 17:12:46,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:46,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:46,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:46,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:46,931 INFO L87 Difference]: Start difference. First operand 7820 states and 20587 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:47,180 INFO L93 Difference]: Finished difference Result 8754 states and 22356 transitions. [2021-07-09 17:12:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:12:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-09 17:12:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:47,193 INFO L225 Difference]: With dead ends: 8754 [2021-07-09 17:12:47,193 INFO L226 Difference]: Without dead ends: 8694 [2021-07-09 17:12:47,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:47,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8694 states. [2021-07-09 17:12:47,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8694 to 7865. [2021-07-09 17:12:47,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7865 states, 7864 states have (on average 2.6280518819938963) internal successors, (20667), 7864 states have internal predecessors, (20667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:47,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7865 states to 7865 states and 20667 transitions. [2021-07-09 17:12:47,298 INFO L78 Accepts]: Start accepts. Automaton has 7865 states and 20667 transitions. Word has length 50 [2021-07-09 17:12:47,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:47,298 INFO L482 AbstractCegarLoop]: Abstraction has 7865 states and 20667 transitions. [2021-07-09 17:12:47,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 7865 states and 20667 transitions. [2021-07-09 17:12:47,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 17:12:47,304 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:47,304 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:47,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable561,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:47,520 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:47,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:47,520 INFO L82 PathProgramCache]: Analyzing trace with hash -836689913, now seen corresponding path program 154 times [2021-07-09 17:12:47,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:47,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523779462] [2021-07-09 17:12:47,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:47,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:47,572 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:12:47,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:47,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523779462] [2021-07-09 17:12:47,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523779462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:47,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1473932706] [2021-07-09 17:12:47,572 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 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:47,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:12:47,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:47,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:47,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:12:47,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1473932706] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:47,661 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:47,661 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:12:47,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663407153] [2021-07-09 17:12:47,661 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:47,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:47,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:47,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:47,662 INFO L87 Difference]: Start difference. First operand 7865 states and 20667 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:47,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:47,922 INFO L93 Difference]: Finished difference Result 8782 states and 22434 transitions. [2021-07-09 17:12:47,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:12:47,923 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-09 17:12:47,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:47,935 INFO L225 Difference]: With dead ends: 8782 [2021-07-09 17:12:47,936 INFO L226 Difference]: Without dead ends: 8744 [2021-07-09 17:12:47,936 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.2ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8744 states. [2021-07-09 17:12:48,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8744 to 7937. [2021-07-09 17:12:48,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7937 states, 7936 states have (on average 2.62109375) internal successors, (20801), 7936 states have internal predecessors, (20801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:48,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7937 states to 7937 states and 20801 transitions. [2021-07-09 17:12:48,044 INFO L78 Accepts]: Start accepts. Automaton has 7937 states and 20801 transitions. Word has length 50 [2021-07-09 17:12:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:48,044 INFO L482 AbstractCegarLoop]: Abstraction has 7937 states and 20801 transitions. [2021-07-09 17:12:48,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 7937 states and 20801 transitions. [2021-07-09 17:12:48,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 17:12:48,051 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:48,051 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:48,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-07-09 17:12:48,266 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:48,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:48,267 INFO L82 PathProgramCache]: Analyzing trace with hash 391944291, now seen corresponding path program 155 times [2021-07-09 17:12:48,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:48,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41687823] [2021-07-09 17:12:48,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:48,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:48,319 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:12:48,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:48,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41687823] [2021-07-09 17:12:48,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41687823] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:48,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695734622] [2021-07-09 17:12:48,320 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 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:48,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 17:12:48,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:48,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:48,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:48,412 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:12:48,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695734622] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:48,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:48,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:12:48,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386041300] [2021-07-09 17:12:48,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:48,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:48,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:48,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:48,412 INFO L87 Difference]: Start difference. First operand 7937 states and 20801 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:48,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:48,692 INFO L93 Difference]: Finished difference Result 8848 states and 22578 transitions. [2021-07-09 17:12:48,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:12:48,692 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-09 17:12:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:48,704 INFO L225 Difference]: With dead ends: 8848 [2021-07-09 17:12:48,704 INFO L226 Difference]: Without dead ends: 8814 [2021-07-09 17:12:48,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 42.7ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:48,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8814 states. [2021-07-09 17:12:48,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8814 to 8036. [2021-07-09 17:12:48,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8036 states, 8035 states have (on average 2.612196639701307) internal successors, (20989), 8035 states have internal predecessors, (20989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:48,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8036 states to 8036 states and 20989 transitions. [2021-07-09 17:12:48,824 INFO L78 Accepts]: Start accepts. Automaton has 8036 states and 20989 transitions. Word has length 50 [2021-07-09 17:12:48,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:48,825 INFO L482 AbstractCegarLoop]: Abstraction has 8036 states and 20989 transitions. [2021-07-09 17:12:48,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:48,825 INFO L276 IsEmpty]: Start isEmpty. Operand 8036 states and 20989 transitions. [2021-07-09 17:12:48,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 17:12:48,831 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:48,831 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:49,046 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable563,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:49,047 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:49,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:49,047 INFO L82 PathProgramCache]: Analyzing trace with hash 922219143, now seen corresponding path program 156 times [2021-07-09 17:12:49,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:49,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744969928] [2021-07-09 17:12:49,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:49,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:12:49,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:49,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744969928] [2021-07-09 17:12:49,101 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744969928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:49,101 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998493048] [2021-07-09 17:12:49,101 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 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:49,131 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 17:12:49,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:49,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:49,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:49,193 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:12:49,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998493048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:49,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:49,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:12:49,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016517433] [2021-07-09 17:12:49,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:49,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:49,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:49,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:49,194 INFO L87 Difference]: Start difference. First operand 8036 states and 20989 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:49,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:49,463 INFO L93 Difference]: Finished difference Result 9347 states and 23857 transitions. [2021-07-09 17:12:49,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:12:49,463 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-09 17:12:49,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:49,476 INFO L225 Difference]: With dead ends: 9347 [2021-07-09 17:12:49,476 INFO L226 Difference]: Without dead ends: 9311 [2021-07-09 17:12:49,476 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.1ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:49,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9311 states. [2021-07-09 17:12:49,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9311 to 8477. [2021-07-09 17:12:49,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8477 states, 8476 states have (on average 2.612907031618688) internal successors, (22147), 8476 states have internal predecessors, (22147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:49,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8477 states to 8477 states and 22147 transitions. [2021-07-09 17:12:49,652 INFO L78 Accepts]: Start accepts. Automaton has 8477 states and 22147 transitions. Word has length 50 [2021-07-09 17:12:49,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:49,652 INFO L482 AbstractCegarLoop]: Abstraction has 8477 states and 22147 transitions. [2021-07-09 17:12:49,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:49,652 INFO L276 IsEmpty]: Start isEmpty. Operand 8477 states and 22147 transitions. [2021-07-09 17:12:49,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-07-09 17:12:49,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:49,659 INFO L508 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:49,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 280 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-07-09 17:12:49,875 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:49,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:49,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1450620387, now seen corresponding path program 157 times [2021-07-09 17:12:49,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:49,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271771401] [2021-07-09 17:12:49,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:49,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:12:49,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271771401] [2021-07-09 17:12:49,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [271771401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:49,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754629454] [2021-07-09 17:12:49,928 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 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:49,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:49,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 27 conjunts are in the unsatisfiable core [2021-07-09 17:12:49,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:12:50,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754629454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:50,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:50,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-07-09 17:12:50,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306576710] [2021-07-09 17:12:50,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-09 17:12:50,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:50,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-09 17:12:50,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:50,017 INFO L87 Difference]: Start difference. First operand 8477 states and 22147 transitions. Second operand has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:50,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:12:50,270 INFO L93 Difference]: Finished difference Result 9828 states and 25051 transitions. [2021-07-09 17:12:50,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-09 17:12:50,270 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-07-09 17:12:50,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:12:50,288 INFO L225 Difference]: With dead ends: 9828 [2021-07-09 17:12:50,288 INFO L226 Difference]: Without dead ends: 9803 [2021-07-09 17:12:50,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2021-07-09 17:12:50,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9803 states. [2021-07-09 17:12:50,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9803 to 8967. [2021-07-09 17:12:50,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8967 states, 8966 states have (on average 2.605955833147446) internal successors, (23365), 8966 states have internal predecessors, (23365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:50,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8967 states to 8967 states and 23365 transitions. [2021-07-09 17:12:50,440 INFO L78 Accepts]: Start accepts. Automaton has 8967 states and 23365 transitions. Word has length 50 [2021-07-09 17:12:50,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:12:50,440 INFO L482 AbstractCegarLoop]: Abstraction has 8967 states and 23365 transitions. [2021-07-09 17:12:50,440 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 5.444444444444445) internal successors, (49), 8 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:12:50,440 INFO L276 IsEmpty]: Start isEmpty. Operand 8967 states and 23365 transitions. [2021-07-09 17:12:50,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:12:50,451 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:12:50,451 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:12:50,668 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable565 [2021-07-09 17:12:50,668 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:12:50,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:12:50,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1040519320, now seen corresponding path program 74 times [2021-07-09 17:12:50,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:12:50,669 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757537292] [2021-07-09 17:12:50,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:12:50,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:12:50,808 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:50,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:12:50,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757537292] [2021-07-09 17:12:50,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757537292] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:50,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041491128] [2021-07-09 17:12:50,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:12:50,836 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:12:50,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:12:50,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:12:50,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:12:51,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:12:51,650 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-09 17:12:51,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:12:51,652 INFO L628 ElimStorePlain]: treesize reduction 19, result has 5.0 percent of original size [2021-07-09 17:12:51,652 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:12:51,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:12:51,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:1 [2021-07-09 17:12:51,658 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 52 proven. 82 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:12:51,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041491128] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:12:51,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:12:51,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 34 [2021-07-09 17:12:51,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951114940] [2021-07-09 17:12:51,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-07-09 17:12:51,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:12:51,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-07-09 17:12:51,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:12:51,659 INFO L87 Difference]: Start difference. First operand 8967 states and 23365 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:03,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:03,736 INFO L93 Difference]: Finished difference Result 20584 states and 47715 transitions. [2021-07-09 17:13:03,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 233 states. [2021-07-09 17:13:03,737 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:03,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:03,768 INFO L225 Difference]: With dead ends: 20584 [2021-07-09 17:13:03,768 INFO L226 Difference]: Without dead ends: 19760 [2021-07-09 17:13:03,776 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25560 ImplicationChecksByTransitivity, 10376.0ms TimeCoverageRelationStatistics Valid=7737, Invalid=56525, Unknown=0, NotChecked=0, Total=64262 [2021-07-09 17:13:03,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19760 states. [2021-07-09 17:13:03,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19760 to 9874. [2021-07-09 17:13:03,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9874 states, 9873 states have (on average 2.635976906715284) internal successors, (26025), 9873 states have internal predecessors, (26025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:03,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9874 states to 9874 states and 26025 transitions. [2021-07-09 17:13:03,986 INFO L78 Accepts]: Start accepts. Automaton has 9874 states and 26025 transitions. Word has length 53 [2021-07-09 17:13:03,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:03,986 INFO L482 AbstractCegarLoop]: Abstraction has 9874 states and 26025 transitions. [2021-07-09 17:13:03,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 34 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:03,986 INFO L276 IsEmpty]: Start isEmpty. Operand 9874 states and 26025 transitions. [2021-07-09 17:13:03,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:03,996 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:03,996 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:04,197 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:04,197 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:04,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:04,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1328551784, now seen corresponding path program 158 times [2021-07-09 17:13:04,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:04,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440208270] [2021-07-09 17:13:04,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:04,360 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 119 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:04,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:04,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440208270] [2021-07-09 17:13:04,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440208270] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:04,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117990941] [2021-07-09 17:13:04,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:04,390 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:04,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:04,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:04,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:04,756 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:04,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117990941] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:04,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:04,757 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-07-09 17:13:04,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866564282] [2021-07-09 17:13:04,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:13:04,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:04,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:13:04,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:13:04,757 INFO L87 Difference]: Start difference. First operand 9874 states and 26025 transitions. Second operand has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:05,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:05,771 INFO L93 Difference]: Finished difference Result 10122 states and 26411 transitions. [2021-07-09 17:13:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:05,772 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:05,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:05,789 INFO L225 Difference]: With dead ends: 10122 [2021-07-09 17:13:05,789 INFO L226 Difference]: Without dead ends: 10030 [2021-07-09 17:13:05,789 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 392.7ms TimeCoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:13:05,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10030 states. [2021-07-09 17:13:05,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10030 to 9858. [2021-07-09 17:13:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9858 states, 9857 states have (on average 2.632038145480369) internal successors, (25944), 9857 states have internal predecessors, (25944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:05,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9858 states to 9858 states and 25944 transitions. [2021-07-09 17:13:05,960 INFO L78 Accepts]: Start accepts. Automaton has 9858 states and 25944 transitions. Word has length 53 [2021-07-09 17:13:05,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:05,960 INFO L482 AbstractCegarLoop]: Abstraction has 9858 states and 25944 transitions. [2021-07-09 17:13:05,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.3043478260869565) internal successors, (76), 22 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:05,961 INFO L276 IsEmpty]: Start isEmpty. Operand 9858 states and 25944 transitions. [2021-07-09 17:13:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:05,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:05,971 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:06,186 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-07-09 17:13:06,186 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:06,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:06,187 INFO L82 PathProgramCache]: Analyzing trace with hash -1609870245, now seen corresponding path program 75 times [2021-07-09 17:13:06,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:06,187 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281733755] [2021-07-09 17:13:06,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:06,251 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 79 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:06,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:06,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281733755] [2021-07-09 17:13:06,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281733755] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:06,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649165359] [2021-07-09 17:13:06,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:06,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:13:06,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:06,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:06,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:06,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649165359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:06,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:06,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:13:06,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310908112] [2021-07-09 17:13:06,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:06,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:06,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:06,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:06,368 INFO L87 Difference]: Start difference. First operand 9858 states and 25944 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:06,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:06,567 INFO L93 Difference]: Finished difference Result 13958 states and 35088 transitions. [2021-07-09 17:13:06,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:06,567 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:06,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:06,593 INFO L225 Difference]: With dead ends: 13958 [2021-07-09 17:13:06,594 INFO L226 Difference]: Without dead ends: 13958 [2021-07-09 17:13:06,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 68.4ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:06,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13958 states. [2021-07-09 17:13:06,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13958 to 10572. [2021-07-09 17:13:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10572 states, 10571 states have (on average 2.6615268186548104) internal successors, (28135), 10571 states have internal predecessors, (28135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10572 states to 10572 states and 28135 transitions. [2021-07-09 17:13:06,812 INFO L78 Accepts]: Start accepts. Automaton has 10572 states and 28135 transitions. Word has length 53 [2021-07-09 17:13:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:06,812 INFO L482 AbstractCegarLoop]: Abstraction has 10572 states and 28135 transitions. [2021-07-09 17:13:06,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 10572 states and 28135 transitions. [2021-07-09 17:13:06,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:06,823 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:06,823 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:07,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable576 [2021-07-09 17:13:07,039 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:07,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:07,040 INFO L82 PathProgramCache]: Analyzing trace with hash -2143735621, now seen corresponding path program 159 times [2021-07-09 17:13:07,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:07,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273504259] [2021-07-09 17:13:07,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:07,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:07,120 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:07,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:07,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273504259] [2021-07-09 17:13:07,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273504259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:07,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390673110] [2021-07-09 17:13:07,121 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 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:07,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:13:07,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:07,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:07,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:07,246 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:07,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390673110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:07,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:07,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:13:07,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679807032] [2021-07-09 17:13:07,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:07,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:07,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:07,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:07,247 INFO L87 Difference]: Start difference. First operand 10572 states and 28135 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:07,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:07,443 INFO L93 Difference]: Finished difference Result 11271 states and 29322 transitions. [2021-07-09 17:13:07,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:07,443 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:07,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:07,469 INFO L225 Difference]: With dead ends: 11271 [2021-07-09 17:13:07,469 INFO L226 Difference]: Without dead ends: 11265 [2021-07-09 17:13:07,469 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 73.5ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:07,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11265 states. [2021-07-09 17:13:07,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11265 to 10496. [2021-07-09 17:13:07,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10496 states, 10495 states have (on average 2.6580276322058123) internal successors, (27896), 10495 states have internal predecessors, (27896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:07,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10496 states to 10496 states and 27896 transitions. [2021-07-09 17:13:07,717 INFO L78 Accepts]: Start accepts. Automaton has 10496 states and 27896 transitions. Word has length 53 [2021-07-09 17:13:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:07,717 INFO L482 AbstractCegarLoop]: Abstraction has 10496 states and 27896 transitions. [2021-07-09 17:13:07,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 10496 states and 27896 transitions. [2021-07-09 17:13:07,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:07,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:07,730 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:07,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-07-09 17:13:07,955 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:07,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:07,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1194965254, now seen corresponding path program 76 times [2021-07-09 17:13:07,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:07,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791268436] [2021-07-09 17:13:07,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:07,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:08,056 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:08,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:08,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791268436] [2021-07-09 17:13:08,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791268436] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:08,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892695715] [2021-07-09 17:13:08,056 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:08,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:08,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:08,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:08,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:08,165 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:08,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892695715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:08,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:08,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:08,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455610337] [2021-07-09 17:13:08,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:08,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:08,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:08,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:08,166 INFO L87 Difference]: Start difference. First operand 10496 states and 27896 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:08,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:08,617 INFO L93 Difference]: Finished difference Result 11930 states and 30766 transitions. [2021-07-09 17:13:08,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:08,618 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:08,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:08,638 INFO L225 Difference]: With dead ends: 11930 [2021-07-09 17:13:08,638 INFO L226 Difference]: Without dead ends: 11885 [2021-07-09 17:13:08,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11885 states. [2021-07-09 17:13:08,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11885 to 10613. [2021-07-09 17:13:08,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10613 states, 10612 states have (on average 2.6563324538258577) internal successors, (28189), 10612 states have internal predecessors, (28189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:08,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10613 states to 10613 states and 28189 transitions. [2021-07-09 17:13:08,851 INFO L78 Accepts]: Start accepts. Automaton has 10613 states and 28189 transitions. Word has length 53 [2021-07-09 17:13:08,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:08,851 INFO L482 AbstractCegarLoop]: Abstraction has 10613 states and 28189 transitions. [2021-07-09 17:13:08,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:08,852 INFO L276 IsEmpty]: Start isEmpty. Operand 10613 states and 28189 transitions. [2021-07-09 17:13:08,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:08,863 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:08,863 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:09,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,286 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:09,080 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:09,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:09,080 INFO L82 PathProgramCache]: Analyzing trace with hash -358731603, now seen corresponding path program 160 times [2021-07-09 17:13:09,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:09,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607532246] [2021-07-09 17:13:09,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:09,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:09,138 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:09,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607532246] [2021-07-09 17:13:09,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607532246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:09,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820193688] [2021-07-09 17:13:09,139 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 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:09,166 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:09,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:09,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:09,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:09,238 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 69 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:09,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820193688] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:09,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:09,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:13:09,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116274701] [2021-07-09 17:13:09,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:13:09,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:09,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:13:09,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:13:09,239 INFO L87 Difference]: Start difference. First operand 10613 states and 28189 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:09,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:09,419 INFO L93 Difference]: Finished difference Result 11953 states and 30528 transitions. [2021-07-09 17:13:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:09,419 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:09,441 INFO L225 Difference]: With dead ends: 11953 [2021-07-09 17:13:09,441 INFO L226 Difference]: Without dead ends: 11950 [2021-07-09 17:13:09,442 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 48.7ms TimeCoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:09,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11950 states. [2021-07-09 17:13:09,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11950 to 10587. [2021-07-09 17:13:09,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10587 states, 10586 states have (on average 2.65397695068959) internal successors, (28095), 10586 states have internal predecessors, (28095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:09,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10587 states to 10587 states and 28095 transitions. [2021-07-09 17:13:09,634 INFO L78 Accepts]: Start accepts. Automaton has 10587 states and 28095 transitions. Word has length 53 [2021-07-09 17:13:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:09,634 INFO L482 AbstractCegarLoop]: Abstraction has 10587 states and 28095 transitions. [2021-07-09 17:13:09,634 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 10587 states and 28095 transitions. [2021-07-09 17:13:09,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:09,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:09,645 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:09,862 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:09,862 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:09,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:09,863 INFO L82 PathProgramCache]: Analyzing trace with hash -151669037, now seen corresponding path program 161 times [2021-07-09 17:13:09,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:09,863 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105269697] [2021-07-09 17:13:09,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:09,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:09,923 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 59 proven. 72 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:09,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:09,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105269697] [2021-07-09 17:13:09,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105269697] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:09,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739643272] [2021-07-09 17:13:09,924 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 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:09,953 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:13:09,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:09,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:09,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:10,055 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 63 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:10,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739643272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:10,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:10,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-07-09 17:13:10,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708009556] [2021-07-09 17:13:10,055 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:13:10,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:10,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:13:10,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:10,055 INFO L87 Difference]: Start difference. First operand 10587 states and 28095 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:10,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:10,341 INFO L93 Difference]: Finished difference Result 12225 states and 31030 transitions. [2021-07-09 17:13:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:10,342 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:10,361 INFO L225 Difference]: With dead ends: 12225 [2021-07-09 17:13:10,361 INFO L226 Difference]: Without dead ends: 12207 [2021-07-09 17:13:10,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 105.4ms TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:10,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12207 states. [2021-07-09 17:13:10,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12207 to 10208. [2021-07-09 17:13:10,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10208 states, 10207 states have (on average 2.6436759086901147) internal successors, (26984), 10207 states have internal predecessors, (26984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:10,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10208 states to 10208 states and 26984 transitions. [2021-07-09 17:13:10,535 INFO L78 Accepts]: Start accepts. Automaton has 10208 states and 26984 transitions. Word has length 53 [2021-07-09 17:13:10,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:10,535 INFO L482 AbstractCegarLoop]: Abstraction has 10208 states and 26984 transitions. [2021-07-09 17:13:10,535 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 16 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:10,535 INFO L276 IsEmpty]: Start isEmpty. Operand 10208 states and 26984 transitions. [2021-07-09 17:13:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:10,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:10,545 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:10,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable583,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:10,760 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:10,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:10,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1599669050, now seen corresponding path program 162 times [2021-07-09 17:13:10,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:10,761 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435089160] [2021-07-09 17:13:10,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:10,834 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:10,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:10,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435089160] [2021-07-09 17:13:10,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435089160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:10,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295875164] [2021-07-09 17:13:10,835 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 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:10,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:13:10,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:10,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:13:10,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:11,062 INFO L354 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2021-07-09 17:13:11,063 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 16 [2021-07-09 17:13:11,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:13:11,070 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-09 17:13:11,070 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:13:11,070 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:13:11,070 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:27, output treesize:19 [2021-07-09 17:13:11,109 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 45 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:11,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295875164] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:11,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:11,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 20 [2021-07-09 17:13:11,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170883810] [2021-07-09 17:13:11,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:13:11,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:11,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:13:11,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:11,110 INFO L87 Difference]: Start difference. First operand 10208 states and 26984 transitions. Second operand has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:13,738 INFO L93 Difference]: Finished difference Result 13433 states and 33117 transitions. [2021-07-09 17:13:13,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-07-09 17:13:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:13,762 INFO L225 Difference]: With dead ends: 13433 [2021-07-09 17:13:13,762 INFO L226 Difference]: Without dead ends: 13411 [2021-07-09 17:13:13,764 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2987 ImplicationChecksByTransitivity, 1577.4ms TimeCoverageRelationStatistics Valid=1527, Invalid=7403, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 17:13:13,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13411 states. [2021-07-09 17:13:13,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13411 to 10206. [2021-07-09 17:13:13,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10206 states, 10205 states have (on average 2.6425281724644782) internal successors, (26967), 10205 states have internal predecessors, (26967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:13,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10206 states to 10206 states and 26967 transitions. [2021-07-09 17:13:13,964 INFO L78 Accepts]: Start accepts. Automaton has 10206 states and 26967 transitions. Word has length 53 [2021-07-09 17:13:13,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:13,964 INFO L482 AbstractCegarLoop]: Abstraction has 10206 states and 26967 transitions. [2021-07-09 17:13:13,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.666666666666667) internal successors, (98), 20 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:13,964 INFO L276 IsEmpty]: Start isEmpty. Operand 10206 states and 26967 transitions. [2021-07-09 17:13:13,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:13,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:13,974 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:14,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable586,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:14,191 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:14,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:14,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2081762066, now seen corresponding path program 163 times [2021-07-09 17:13:14,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:14,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677003359] [2021-07-09 17:13:14,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:14,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:14,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:14,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677003359] [2021-07-09 17:13:14,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677003359] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:14,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218810259] [2021-07-09 17:13:14,274 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 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:14,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:14,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:14,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:14,378 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:14,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218810259] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:14,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:14,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:14,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478613008] [2021-07-09 17:13:14,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:14,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:14,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:14,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:14,379 INFO L87 Difference]: Start difference. First operand 10206 states and 26967 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:14,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:14,834 INFO L93 Difference]: Finished difference Result 11323 states and 29185 transitions. [2021-07-09 17:13:14,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:14,835 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:14,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:14,854 INFO L225 Difference]: With dead ends: 11323 [2021-07-09 17:13:14,854 INFO L226 Difference]: Without dead ends: 11323 [2021-07-09 17:13:14,854 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:14,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11323 states. [2021-07-09 17:13:15,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11323 to 10216. [2021-07-09 17:13:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6420949583945177) internal successors, (26989), 10215 states have internal predecessors, (26989), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:15,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26989 transitions. [2021-07-09 17:13:15,034 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26989 transitions. Word has length 53 [2021-07-09 17:13:15,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:15,034 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26989 transitions. [2021-07-09 17:13:15,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:15,034 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26989 transitions. [2021-07-09 17:13:15,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:15,045 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:15,045 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:15,246 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable587 [2021-07-09 17:13:15,246 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:15,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:15,246 INFO L82 PathProgramCache]: Analyzing trace with hash -71287896, now seen corresponding path program 164 times [2021-07-09 17:13:15,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:15,247 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365672495] [2021-07-09 17:13:15,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:15,344 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:15,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:15,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365672495] [2021-07-09 17:13:15,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365672495] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:15,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238878575] [2021-07-09 17:13:15,344 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 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:15,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:15,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:15,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:15,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:15,447 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:15,447 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238878575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:15,447 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:15,447 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:15,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392214020] [2021-07-09 17:13:15,447 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:15,447 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:15,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:15,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:15,448 INFO L87 Difference]: Start difference. First operand 10216 states and 26989 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:16,048 INFO L93 Difference]: Finished difference Result 11942 states and 30505 transitions. [2021-07-09 17:13:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:16,048 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:16,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:16,070 INFO L225 Difference]: With dead ends: 11942 [2021-07-09 17:13:16,070 INFO L226 Difference]: Without dead ends: 11942 [2021-07-09 17:13:16,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=63, Invalid=357, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:13:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11942 states. [2021-07-09 17:13:16,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11942 to 10248. [2021-07-09 17:13:16,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10248 states, 10247 states have (on average 2.641163267297746) internal successors, (27064), 10247 states have internal predecessors, (27064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:16,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10248 states to 10248 states and 27064 transitions. [2021-07-09 17:13:16,355 INFO L78 Accepts]: Start accepts. Automaton has 10248 states and 27064 transitions. Word has length 53 [2021-07-09 17:13:16,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:16,355 INFO L482 AbstractCegarLoop]: Abstraction has 10248 states and 27064 transitions. [2021-07-09 17:13:16,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:16,355 INFO L276 IsEmpty]: Start isEmpty. Operand 10248 states and 27064 transitions. [2021-07-09 17:13:16,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:16,365 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:16,365 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:16,581 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable588,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:16,581 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:16,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:16,581 INFO L82 PathProgramCache]: Analyzing trace with hash -309349413, now seen corresponding path program 77 times [2021-07-09 17:13:16,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:16,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721611125] [2021-07-09 17:13:16,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:16,641 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:16,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:16,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721611125] [2021-07-09 17:13:16,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721611125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:16,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294417500] [2021-07-09 17:13:16,642 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:16,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:13:16,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:16,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:16,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:16,761 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:16,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294417500] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:16,762 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:16,762 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-07-09 17:13:16,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273859991] [2021-07-09 17:13:16,762 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:16,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:16,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:16,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:16,762 INFO L87 Difference]: Start difference. First operand 10248 states and 27064 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:16,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:16,972 INFO L93 Difference]: Finished difference Result 13713 states and 34190 transitions. [2021-07-09 17:13:16,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:13:16,972 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:16,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:17,000 INFO L225 Difference]: With dead ends: 13713 [2021-07-09 17:13:17,000 INFO L226 Difference]: Without dead ends: 13705 [2021-07-09 17:13:17,000 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:17,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13705 states. [2021-07-09 17:13:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13705 to 10512. [2021-07-09 17:13:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10512 states, 10511 states have (on average 2.6529350204547617) internal successors, (27885), 10511 states have internal predecessors, (27885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10512 states to 10512 states and 27885 transitions. [2021-07-09 17:13:17,208 INFO L78 Accepts]: Start accepts. Automaton has 10512 states and 27885 transitions. Word has length 53 [2021-07-09 17:13:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:17,208 INFO L482 AbstractCegarLoop]: Abstraction has 10512 states and 27885 transitions. [2021-07-09 17:13:17,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 10512 states and 27885 transitions. [2021-07-09 17:13:17,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:17,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:17,218 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:17,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable589 [2021-07-09 17:13:17,433 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:17,433 INFO L82 PathProgramCache]: Analyzing trace with hash -931229823, now seen corresponding path program 78 times [2021-07-09 17:13:17,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:17,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631653988] [2021-07-09 17:13:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:17,492 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 84 proven. 50 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:17,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:17,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631653988] [2021-07-09 17:13:17,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631653988] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:17,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1533676149] [2021-07-09 17:13:17,492 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:17,520 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:13:17,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:17,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:17,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 85 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:17,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1533676149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:17,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:17,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-07-09 17:13:17,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852112682] [2021-07-09 17:13:17,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:17,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:17,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:17,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:17,617 INFO L87 Difference]: Start difference. First operand 10512 states and 27885 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:17,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:17,844 INFO L93 Difference]: Finished difference Result 15140 states and 37466 transitions. [2021-07-09 17:13:17,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:13:17,845 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:17,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:17,874 INFO L225 Difference]: With dead ends: 15140 [2021-07-09 17:13:17,874 INFO L226 Difference]: Without dead ends: 15140 [2021-07-09 17:13:17,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 83.8ms TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:17,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15140 states. [2021-07-09 17:13:18,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15140 to 10520. [2021-07-09 17:13:18,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10520 states, 10519 states have (on average 2.6527236429318375) internal successors, (27904), 10519 states have internal predecessors, (27904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:18,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10520 states to 10520 states and 27904 transitions. [2021-07-09 17:13:18,097 INFO L78 Accepts]: Start accepts. Automaton has 10520 states and 27904 transitions. Word has length 53 [2021-07-09 17:13:18,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:18,097 INFO L482 AbstractCegarLoop]: Abstraction has 10520 states and 27904 transitions. [2021-07-09 17:13:18,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:18,097 INFO L276 IsEmpty]: Start isEmpty. Operand 10520 states and 27904 transitions. [2021-07-09 17:13:18,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:18,107 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:18,107 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:18,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable591,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:18,321 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:18,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:18,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1726165017, now seen corresponding path program 79 times [2021-07-09 17:13:18,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:18,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613381555] [2021-07-09 17:13:18,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:18,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 80 proven. 55 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:18,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:18,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613381555] [2021-07-09 17:13:18,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613381555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:18,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [678384528] [2021-07-09 17:13:18,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:18,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:18,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:18,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:18,496 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 81 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:18,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [678384528] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:18,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:18,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:13:18,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957129340] [2021-07-09 17:13:18,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:18,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:18,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:18,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:18,497 INFO L87 Difference]: Start difference. First operand 10520 states and 27904 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:18,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:18,696 INFO L93 Difference]: Finished difference Result 13839 states and 34594 transitions. [2021-07-09 17:13:18,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:18,696 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:18,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:18,717 INFO L225 Difference]: With dead ends: 13839 [2021-07-09 17:13:18,717 INFO L226 Difference]: Without dead ends: 13839 [2021-07-09 17:13:18,718 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 83.7ms TimeCoverageRelationStatistics Valid=94, Invalid=146, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:18,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13839 states. [2021-07-09 17:13:18,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13839 to 10344. [2021-07-09 17:13:18,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10344 states, 10343 states have (on average 2.6458474330465047) internal successors, (27366), 10343 states have internal predecessors, (27366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:18,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 27366 transitions. [2021-07-09 17:13:18,899 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 27366 transitions. Word has length 53 [2021-07-09 17:13:18,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:18,899 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 27366 transitions. [2021-07-09 17:13:18,899 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:18,899 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 27366 transitions. [2021-07-09 17:13:18,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:18,908 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:18,908 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:19,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:19,123 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:19,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:19,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1133718440, now seen corresponding path program 80 times [2021-07-09 17:13:19,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:19,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356176865] [2021-07-09 17:13:19,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:19,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:19,201 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 22 proven. 111 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:19,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:19,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356176865] [2021-07-09 17:13:19,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356176865] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:19,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1327201333] [2021-07-09 17:13:19,202 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:19,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:19,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:19,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:19,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:19,336 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 20 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:19,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1327201333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:19,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:19,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 17:13:19,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408629310] [2021-07-09 17:13:19,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:19,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:19,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:19,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:19,337 INFO L87 Difference]: Start difference. First operand 10344 states and 27366 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:19,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:19,993 INFO L93 Difference]: Finished difference Result 10977 states and 28511 transitions. [2021-07-09 17:13:19,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:19,993 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:19,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:20,012 INFO L225 Difference]: With dead ends: 10977 [2021-07-09 17:13:20,012 INFO L226 Difference]: Without dead ends: 10881 [2021-07-09 17:13:20,012 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:20,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10881 states. [2021-07-09 17:13:20,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10881 to 10343. [2021-07-09 17:13:20,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 2.6447495648810673) internal successors, (27352), 10342 states have internal predecessors, (27352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:20,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27352 transitions. [2021-07-09 17:13:20,191 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27352 transitions. Word has length 53 [2021-07-09 17:13:20,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:20,191 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27352 transitions. [2021-07-09 17:13:20,191 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:20,191 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27352 transitions. [2021-07-09 17:13:20,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:20,201 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:20,202 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:20,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable593,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:20,404 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:20,404 INFO L82 PathProgramCache]: Analyzing trace with hash 1461271213, now seen corresponding path program 165 times [2021-07-09 17:13:20,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:20,404 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878935694] [2021-07-09 17:13:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:20,481 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:20,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:20,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878935694] [2021-07-09 17:13:20,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878935694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:20,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859244989] [2021-07-09 17:13:20,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:20,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:13:20,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:20,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:20,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:20,589 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:20,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859244989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:20,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:20,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:13:20,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463655286] [2021-07-09 17:13:20,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:20,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:20,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:20,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:20,590 INFO L87 Difference]: Start difference. First operand 10343 states and 27352 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:20,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:20,786 INFO L93 Difference]: Finished difference Result 11313 states and 29024 transitions. [2021-07-09 17:13:20,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:13:20,786 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:20,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:20,805 INFO L225 Difference]: With dead ends: 11313 [2021-07-09 17:13:20,805 INFO L226 Difference]: Without dead ends: 11295 [2021-07-09 17:13:20,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:20,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11295 states. [2021-07-09 17:13:20,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11295 to 10343. [2021-07-09 17:13:20,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10343 states, 10342 states have (on average 2.643782633919938) internal successors, (27342), 10342 states have internal predecessors, (27342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:20,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10343 states to 10343 states and 27342 transitions. [2021-07-09 17:13:20,975 INFO L78 Accepts]: Start accepts. Automaton has 10343 states and 27342 transitions. Word has length 53 [2021-07-09 17:13:20,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:20,975 INFO L482 AbstractCegarLoop]: Abstraction has 10343 states and 27342 transitions. [2021-07-09 17:13:20,975 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:20,975 INFO L276 IsEmpty]: Start isEmpty. Operand 10343 states and 27342 transitions. [2021-07-09 17:13:20,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:20,985 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:20,985 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:21,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:21,195 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:21,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:21,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1403224534, now seen corresponding path program 81 times [2021-07-09 17:13:21,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:21,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113613030] [2021-07-09 17:13:21,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:21,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:21,290 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:21,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:21,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113613030] [2021-07-09 17:13:21,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113613030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:21,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067834672] [2021-07-09 17:13:21,290 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 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:21,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:13:21,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:21,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:21,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:21,397 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:21,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1067834672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:21,397 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:21,397 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:21,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426900020] [2021-07-09 17:13:21,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:21,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:21,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:21,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:21,398 INFO L87 Difference]: Start difference. First operand 10343 states and 27342 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:21,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:21,849 INFO L93 Difference]: Finished difference Result 11804 states and 30259 transitions. [2021-07-09 17:13:21,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:21,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:21,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:21,871 INFO L225 Difference]: With dead ends: 11804 [2021-07-09 17:13:21,871 INFO L226 Difference]: Without dead ends: 11766 [2021-07-09 17:13:21,871 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.3ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:21,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11766 states. [2021-07-09 17:13:22,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11766 to 10492. [2021-07-09 17:13:22,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10492 states, 10491 states have (on average 2.6421694786007053) internal successors, (27719), 10491 states have internal predecessors, (27719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10492 states to 10492 states and 27719 transitions. [2021-07-09 17:13:22,070 INFO L78 Accepts]: Start accepts. Automaton has 10492 states and 27719 transitions. Word has length 53 [2021-07-09 17:13:22,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:22,070 INFO L482 AbstractCegarLoop]: Abstraction has 10492 states and 27719 transitions. [2021-07-09 17:13:22,070 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:22,070 INFO L276 IsEmpty]: Start isEmpty. Operand 10492 states and 27719 transitions. [2021-07-09 17:13:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:22,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:22,083 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:22,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-07-09 17:13:22,301 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:22,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:22,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1338045905, now seen corresponding path program 166 times [2021-07-09 17:13:22,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:22,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521195014] [2021-07-09 17:13:22,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:22,350 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:22,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:22,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521195014] [2021-07-09 17:13:22,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521195014] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:22,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328433111] [2021-07-09 17:13:22,351 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 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:22,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:22,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:22,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:22,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:22,439 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 79 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:22,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328433111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:22,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:22,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:13:22,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433182985] [2021-07-09 17:13:22,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:13:22,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:22,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:13:22,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:13:22,440 INFO L87 Difference]: Start difference. First operand 10492 states and 27719 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:22,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:22,579 INFO L93 Difference]: Finished difference Result 12007 states and 30378 transitions. [2021-07-09 17:13:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:22,579 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:22,597 INFO L225 Difference]: With dead ends: 12007 [2021-07-09 17:13:22,597 INFO L226 Difference]: Without dead ends: 12004 [2021-07-09 17:13:22,598 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 44.9ms TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12004 states. [2021-07-09 17:13:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12004 to 10472. [2021-07-09 17:13:22,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10472 states, 10471 states have (on average 2.639957979180594) internal successors, (27643), 10471 states have internal predecessors, (27643), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:22,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27643 transitions. [2021-07-09 17:13:22,775 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27643 transitions. Word has length 53 [2021-07-09 17:13:22,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:22,775 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27643 transitions. [2021-07-09 17:13:22,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:22,775 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27643 transitions. [2021-07-09 17:13:22,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:22,785 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:22,785 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:23,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable599 [2021-07-09 17:13:23,001 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:23,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:23,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1545108471, now seen corresponding path program 167 times [2021-07-09 17:13:23,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:23,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378505357] [2021-07-09 17:13:23,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:23,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:23,078 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:23,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:23,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378505357] [2021-07-09 17:13:23,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378505357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:23,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180231254] [2021-07-09 17:13:23,079 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 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:23,109 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:13:23,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:23,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:23,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:23,207 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 83 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:23,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1180231254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:23,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:23,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 15 [2021-07-09 17:13:23,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175740716] [2021-07-09 17:13:23,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:23,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:23,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:23,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:23,208 INFO L87 Difference]: Start difference. First operand 10472 states and 27643 transitions. Second operand has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:23,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:23,488 INFO L93 Difference]: Finished difference Result 12244 states and 30811 transitions. [2021-07-09 17:13:23,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:23,489 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:23,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:23,509 INFO L225 Difference]: With dead ends: 12244 [2021-07-09 17:13:23,510 INFO L226 Difference]: Without dead ends: 12226 [2021-07-09 17:13:23,510 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 103.3ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:13:23,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12226 states. [2021-07-09 17:13:23,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12226 to 10472. [2021-07-09 17:13:23,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10472 states, 10471 states have (on average 2.6376659344857223) internal successors, (27619), 10471 states have internal predecessors, (27619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:23,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10472 states to 10472 states and 27619 transitions. [2021-07-09 17:13:23,699 INFO L78 Accepts]: Start accepts. Automaton has 10472 states and 27619 transitions. Word has length 53 [2021-07-09 17:13:23,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:23,699 INFO L482 AbstractCegarLoop]: Abstraction has 10472 states and 27619 transitions. [2021-07-09 17:13:23,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.625) internal successors, (74), 15 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:23,700 INFO L276 IsEmpty]: Start isEmpty. Operand 10472 states and 27619 transitions. [2021-07-09 17:13:23,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:23,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:23,710 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:23,926 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable601,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:23,926 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:23,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:23,926 INFO L82 PathProgramCache]: Analyzing trace with hash 97108458, now seen corresponding path program 168 times [2021-07-09 17:13:23,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:23,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076681526] [2021-07-09 17:13:23,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:23,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:24,001 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:24,001 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:24,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076681526] [2021-07-09 17:13:24,001 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076681526] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:24,001 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764208344] [2021-07-09 17:13:24,001 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 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:24,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:13:24,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:24,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:24,137 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:24,138 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764208344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:24,138 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:24,138 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:13:24,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384184058] [2021-07-09 17:13:24,138 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:24,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:24,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:24,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:24,138 INFO L87 Difference]: Start difference. First operand 10472 states and 27619 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:24,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:24,747 INFO L93 Difference]: Finished difference Result 11210 states and 28930 transitions. [2021-07-09 17:13:24,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:24,748 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:24,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:24,769 INFO L225 Difference]: With dead ends: 11210 [2021-07-09 17:13:24,769 INFO L226 Difference]: Without dead ends: 11154 [2021-07-09 17:13:24,769 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:24,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11154 states. [2021-07-09 17:13:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11154 to 10444. [2021-07-09 17:13:24,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10444 states, 10443 states have (on average 2.63497079383319) internal successors, (27517), 10443 states have internal predecessors, (27517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:24,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10444 states to 10444 states and 27517 transitions. [2021-07-09 17:13:24,954 INFO L78 Accepts]: Start accepts. Automaton has 10444 states and 27517 transitions. Word has length 53 [2021-07-09 17:13:24,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:24,954 INFO L482 AbstractCegarLoop]: Abstraction has 10444 states and 27517 transitions. [2021-07-09 17:13:24,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:24,955 INFO L276 IsEmpty]: Start isEmpty. Operand 10444 states and 27517 transitions. [2021-07-09 17:13:24,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:24,965 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:24,965 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:25,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable604 [2021-07-09 17:13:25,181 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:25,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:25,181 INFO L82 PathProgramCache]: Analyzing trace with hash -516427722, now seen corresponding path program 169 times [2021-07-09 17:13:25,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:25,181 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067531899] [2021-07-09 17:13:25,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:25,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:25,263 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:25,263 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:25,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067531899] [2021-07-09 17:13:25,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067531899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:25,263 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218112317] [2021-07-09 17:13:25,263 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:25,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:25,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:25,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:25,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218112317] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:25,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:25,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:25,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359343050] [2021-07-09 17:13:25,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:25,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:25,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:25,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:25,366 INFO L87 Difference]: Start difference. First operand 10444 states and 27517 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:25,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:25,810 INFO L93 Difference]: Finished difference Result 11584 states and 29771 transitions. [2021-07-09 17:13:25,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:25,810 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:25,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:25,829 INFO L225 Difference]: With dead ends: 11584 [2021-07-09 17:13:25,829 INFO L226 Difference]: Without dead ends: 11572 [2021-07-09 17:13:25,829 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 125.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:25,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11572 states. [2021-07-09 17:13:25,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11572 to 10490. [2021-07-09 17:13:25,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10490 states, 10489 states have (on average 2.6332348174277813) internal successors, (27620), 10489 states have internal predecessors, (27620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:25,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10490 states to 10490 states and 27620 transitions. [2021-07-09 17:13:25,997 INFO L78 Accepts]: Start accepts. Automaton has 10490 states and 27620 transitions. Word has length 53 [2021-07-09 17:13:25,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:25,997 INFO L482 AbstractCegarLoop]: Abstraction has 10490 states and 27620 transitions. [2021-07-09 17:13:25,997 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:25,997 INFO L276 IsEmpty]: Start isEmpty. Operand 10490 states and 27620 transitions. [2021-07-09 17:13:26,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:26,006 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:26,006 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:26,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable605,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:26,222 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:26,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:26,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1625489612, now seen corresponding path program 170 times [2021-07-09 17:13:26,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:26,222 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793123031] [2021-07-09 17:13:26,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:26,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:26,303 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:26,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:26,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793123031] [2021-07-09 17:13:26,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793123031] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:26,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569416053] [2021-07-09 17:13:26,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:26,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:26,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:26,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:26,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:26,410 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:26,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569416053] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:26,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:26,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:26,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659776524] [2021-07-09 17:13:26,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:26,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:26,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:26,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:26,411 INFO L87 Difference]: Start difference. First operand 10490 states and 27620 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:27,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:27,021 INFO L93 Difference]: Finished difference Result 12749 states and 32307 transitions. [2021-07-09 17:13:27,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:13:27,021 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:27,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:27,044 INFO L225 Difference]: With dead ends: 12749 [2021-07-09 17:13:27,044 INFO L226 Difference]: Without dead ends: 12707 [2021-07-09 17:13:27,045 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 180.1ms TimeCoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:13:27,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12707 states. [2021-07-09 17:13:27,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12707 to 10549. [2021-07-09 17:13:27,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10549 states, 10548 states have (on average 2.6331058020477816) internal successors, (27774), 10548 states have internal predecessors, (27774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:27,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10549 states to 10549 states and 27774 transitions. [2021-07-09 17:13:27,236 INFO L78 Accepts]: Start accepts. Automaton has 10549 states and 27774 transitions. Word has length 53 [2021-07-09 17:13:27,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:27,236 INFO L482 AbstractCegarLoop]: Abstraction has 10549 states and 27774 transitions. [2021-07-09 17:13:27,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 10549 states and 27774 transitions. [2021-07-09 17:13:27,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:27,247 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:27,247 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:27,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable606,302 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:27,454 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:27,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:27,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1136918575, now seen corresponding path program 171 times [2021-07-09 17:13:27,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:27,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996712258] [2021-07-09 17:13:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:27,518 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:27,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:27,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996712258] [2021-07-09 17:13:27,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996712258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:27,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62165485] [2021-07-09 17:13:27,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:27,548 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:13:27,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:27,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:27,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:27,612 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 46 proven. 88 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:27,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62165485] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:27,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:27,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:13:27,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109458489] [2021-07-09 17:13:27,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:27,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:27,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:27,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:27,613 INFO L87 Difference]: Start difference. First operand 10549 states and 27774 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:27,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:27,823 INFO L93 Difference]: Finished difference Result 12080 states and 30433 transitions. [2021-07-09 17:13:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:27,823 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:27,844 INFO L225 Difference]: With dead ends: 12080 [2021-07-09 17:13:27,845 INFO L226 Difference]: Without dead ends: 12056 [2021-07-09 17:13:27,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 76.6ms TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:27,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12056 states. [2021-07-09 17:13:28,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12056 to 10182. [2021-07-09 17:13:28,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10182 states, 10181 states have (on average 2.6232197230134564) internal successors, (26707), 10181 states have internal predecessors, (26707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:28,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10182 states to 10182 states and 26707 transitions. [2021-07-09 17:13:28,036 INFO L78 Accepts]: Start accepts. Automaton has 10182 states and 26707 transitions. Word has length 53 [2021-07-09 17:13:28,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:28,036 INFO L482 AbstractCegarLoop]: Abstraction has 10182 states and 26707 transitions. [2021-07-09 17:13:28,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:28,036 INFO L276 IsEmpty]: Start isEmpty. Operand 10182 states and 26707 transitions. [2021-07-09 17:13:28,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:28,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:28,047 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:28,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:28,261 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:28,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:28,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1780326146, now seen corresponding path program 172 times [2021-07-09 17:13:28,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:28,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700797161] [2021-07-09 17:13:28,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:28,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:28,347 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:28,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:28,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700797161] [2021-07-09 17:13:28,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700797161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:28,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642583916] [2021-07-09 17:13:28,348 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:28,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:28,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:28,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:28,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:28,455 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:28,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642583916] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:28,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:28,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:13:28,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392935339] [2021-07-09 17:13:28,456 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:28,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:28,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:28,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:28,456 INFO L87 Difference]: Start difference. First operand 10182 states and 26707 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:29,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:29,065 INFO L93 Difference]: Finished difference Result 12810 states and 32153 transitions. [2021-07-09 17:13:29,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:13:29,066 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:29,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:29,088 INFO L225 Difference]: With dead ends: 12810 [2021-07-09 17:13:29,088 INFO L226 Difference]: Without dead ends: 12756 [2021-07-09 17:13:29,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 195.4ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:13:29,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12756 states. [2021-07-09 17:13:29,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12756 to 10143. [2021-07-09 17:13:29,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10143 states, 10142 states have (on average 2.620291855649773) internal successors, (26575), 10142 states have internal predecessors, (26575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:29,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10143 states to 10143 states and 26575 transitions. [2021-07-09 17:13:29,269 INFO L78 Accepts]: Start accepts. Automaton has 10143 states and 26575 transitions. Word has length 53 [2021-07-09 17:13:29,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:29,269 INFO L482 AbstractCegarLoop]: Abstraction has 10143 states and 26575 transitions. [2021-07-09 17:13:29,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:29,269 INFO L276 IsEmpty]: Start isEmpty. Operand 10143 states and 26575 transitions. [2021-07-09 17:13:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:29,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:29,280 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:29,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-07-09 17:13:29,497 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:29,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:29,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1542264629, now seen corresponding path program 82 times [2021-07-09 17:13:29,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:29,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715946183] [2021-07-09 17:13:29,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:29,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:29,564 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:29,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:29,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715946183] [2021-07-09 17:13:29,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715946183] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:29,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842492782] [2021-07-09 17:13:29,564 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 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:29,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:29,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:29,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:29,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:29,663 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:29,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842492782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:29,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:29,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:13:29,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009692352] [2021-07-09 17:13:29,663 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:29,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:29,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:29,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:29,664 INFO L87 Difference]: Start difference. First operand 10143 states and 26575 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:29,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:29,875 INFO L93 Difference]: Finished difference Result 13236 states and 32994 transitions. [2021-07-09 17:13:29,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:29,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:29,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:29,902 INFO L225 Difference]: With dead ends: 13236 [2021-07-09 17:13:29,902 INFO L226 Difference]: Without dead ends: 13222 [2021-07-09 17:13:29,902 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 71.1ms TimeCoverageRelationStatistics Valid=75, Invalid=107, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13222 states. [2021-07-09 17:13:30,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13222 to 10426. [2021-07-09 17:13:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10426 states, 10425 states have (on average 2.6276258992805754) internal successors, (27393), 10425 states have internal predecessors, (27393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:30,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10426 states to 10426 states and 27393 transitions. [2021-07-09 17:13:30,112 INFO L78 Accepts]: Start accepts. Automaton has 10426 states and 27393 transitions. Word has length 53 [2021-07-09 17:13:30,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:30,112 INFO L482 AbstractCegarLoop]: Abstraction has 10426 states and 27393 transitions. [2021-07-09 17:13:30,112 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:30,112 INFO L276 IsEmpty]: Start isEmpty. Operand 10426 states and 27393 transitions. [2021-07-09 17:13:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:30,123 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:30,123 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:30,336 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable612 [2021-07-09 17:13:30,337 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:30,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:30,337 INFO L82 PathProgramCache]: Analyzing trace with hash 920384219, now seen corresponding path program 83 times [2021-07-09 17:13:30,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:30,337 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710395247] [2021-07-09 17:13:30,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:30,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:30,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710395247] [2021-07-09 17:13:30,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710395247] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:30,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78859650] [2021-07-09 17:13:30,396 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 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:30,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:13:30,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:30,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:30,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:30,568 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 99 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:30,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78859650] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:30,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:30,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 18 [2021-07-09 17:13:30,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509609987] [2021-07-09 17:13:30,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:13:30,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:30,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:13:30,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:13:30,569 INFO L87 Difference]: Start difference. First operand 10426 states and 27393 transitions. Second operand has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:30,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:30,930 INFO L93 Difference]: Finished difference Result 16570 states and 40721 transitions. [2021-07-09 17:13:30,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:13:30,931 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:30,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:30,959 INFO L225 Difference]: With dead ends: 16570 [2021-07-09 17:13:30,959 INFO L226 Difference]: Without dead ends: 16570 [2021-07-09 17:13:30,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 186.4ms TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:13:30,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16570 states. [2021-07-09 17:13:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16570 to 10440. [2021-07-09 17:13:31,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10440 states, 10439 states have (on average 2.627646326276463) internal successors, (27430), 10439 states have internal predecessors, (27430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:31,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10440 states to 10440 states and 27430 transitions. [2021-07-09 17:13:31,195 INFO L78 Accepts]: Start accepts. Automaton has 10440 states and 27430 transitions. Word has length 53 [2021-07-09 17:13:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:31,195 INFO L482 AbstractCegarLoop]: Abstraction has 10440 states and 27430 transitions. [2021-07-09 17:13:31,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.789473684210526) internal successors, (72), 18 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 10440 states and 27430 transitions. [2021-07-09 17:13:31,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:31,205 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:31,205 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:31,421 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:31,422 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:31,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:31,422 INFO L82 PathProgramCache]: Analyzing trace with hash -717188237, now seen corresponding path program 84 times [2021-07-09 17:13:31,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:31,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64482638] [2021-07-09 17:13:31,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:31,483 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 94 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:31,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:31,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64482638] [2021-07-09 17:13:31,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64482638] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:31,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633111541] [2021-07-09 17:13:31,484 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 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:31,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:13:31,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:31,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:13:31,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:31,610 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:31,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633111541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:31,611 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:31,611 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-07-09 17:13:31,611 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247968832] [2021-07-09 17:13:31,611 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:13:31,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:31,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:13:31,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:31,611 INFO L87 Difference]: Start difference. First operand 10440 states and 27430 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:31,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:31,863 INFO L93 Difference]: Finished difference Result 13184 states and 32800 transitions. [2021-07-09 17:13:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:13:31,864 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:31,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:31,886 INFO L225 Difference]: With dead ends: 13184 [2021-07-09 17:13:31,887 INFO L226 Difference]: Without dead ends: 13184 [2021-07-09 17:13:31,887 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=122, Invalid=184, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:31,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13184 states. [2021-07-09 17:13:32,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13184 to 10216. [2021-07-09 17:13:32,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6215369554576604) internal successors, (26779), 10215 states have internal predecessors, (26779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:32,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26779 transitions. [2021-07-09 17:13:32,078 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26779 transitions. Word has length 53 [2021-07-09 17:13:32,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:32,078 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26779 transitions. [2021-07-09 17:13:32,078 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:32,078 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26779 transitions. [2021-07-09 17:13:32,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:32,088 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:32,088 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:32,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable615 [2021-07-09 17:13:32,301 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:32,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:32,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2128038473, now seen corresponding path program 173 times [2021-07-09 17:13:32,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:32,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32148030] [2021-07-09 17:13:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:32,374 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:32,374 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:32,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32148030] [2021-07-09 17:13:32,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32148030] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:32,374 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371089768] [2021-07-09 17:13:32,374 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 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:32,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-07-09 17:13:32,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:32,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:32,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:32,508 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 52 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:32,508 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371089768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:32,508 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:32,508 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 15] total 17 [2021-07-09 17:13:32,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130161261] [2021-07-09 17:13:32,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:13:32,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:32,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:13:32,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:13:32,509 INFO L87 Difference]: Start difference. First operand 10216 states and 26779 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:32,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:32,801 INFO L93 Difference]: Finished difference Result 11730 states and 29482 transitions. [2021-07-09 17:13:32,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:13:32,801 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:32,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:32,818 INFO L225 Difference]: With dead ends: 11730 [2021-07-09 17:13:32,818 INFO L226 Difference]: Without dead ends: 11703 [2021-07-09 17:13:32,818 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 126.7ms TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:13:32,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11703 states. [2021-07-09 17:13:32,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11703 to 10216. [2021-07-09 17:13:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10216 states, 10215 states have (on average 2.6206558981889376) internal successors, (26770), 10215 states have internal predecessors, (26770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:32,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10216 states to 10216 states and 26770 transitions. [2021-07-09 17:13:32,972 INFO L78 Accepts]: Start accepts. Automaton has 10216 states and 26770 transitions. Word has length 53 [2021-07-09 17:13:32,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:32,972 INFO L482 AbstractCegarLoop]: Abstraction has 10216 states and 26770 transitions. [2021-07-09 17:13:32,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:32,972 INFO L276 IsEmpty]: Start isEmpty. Operand 10216 states and 26770 transitions. [2021-07-09 17:13:32,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:32,981 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:32,981 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:33,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,308 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:33,196 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:33,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:33,197 INFO L82 PathProgramCache]: Analyzing trace with hash -174590330, now seen corresponding path program 85 times [2021-07-09 17:13:33,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:33,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158139382] [2021-07-09 17:13:33,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:33,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:33,271 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:33,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:33,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158139382] [2021-07-09 17:13:33,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158139382] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:33,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26453654] [2021-07-09 17:13:33,272 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 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:33,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:33,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:33,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:33,371 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:33,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26453654] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:33,371 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:33,371 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:33,371 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119337035] [2021-07-09 17:13:33,371 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:33,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:33,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:33,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:33,372 INFO L87 Difference]: Start difference. First operand 10216 states and 26770 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:33,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:33,828 INFO L93 Difference]: Finished difference Result 11688 states and 29696 transitions. [2021-07-09 17:13:33,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:33,828 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:33,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:33,847 INFO L225 Difference]: With dead ends: 11688 [2021-07-09 17:13:33,847 INFO L226 Difference]: Without dead ends: 11657 [2021-07-09 17:13:33,848 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11657 states. [2021-07-09 17:13:33,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11657 to 10380. [2021-07-09 17:13:34,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10380 states, 10379 states have (on average 2.618653049426727) internal successors, (27179), 10379 states have internal predecessors, (27179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10380 states to 10380 states and 27179 transitions. [2021-07-09 17:13:34,026 INFO L78 Accepts]: Start accepts. Automaton has 10380 states and 27179 transitions. Word has length 53 [2021-07-09 17:13:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:34,026 INFO L482 AbstractCegarLoop]: Abstraction has 10380 states and 27179 transitions. [2021-07-09 17:13:34,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 10380 states and 27179 transitions. [2021-07-09 17:13:34,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:34,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:34,036 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:34,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable623 [2021-07-09 17:13:34,241 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:34,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:34,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1728287187, now seen corresponding path program 174 times [2021-07-09 17:13:34,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:34,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463346477] [2021-07-09 17:13:34,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:34,289 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:34,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:34,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463346477] [2021-07-09 17:13:34,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463346477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:34,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151195332] [2021-07-09 17:13:34,289 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 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:34,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:13:34,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:34,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:34,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 83 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:34,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151195332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:34,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:34,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:13:34,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591597192] [2021-07-09 17:13:34,383 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:13:34,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:34,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:13:34,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:13:34,384 INFO L87 Difference]: Start difference. First operand 10380 states and 27179 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:34,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:34,540 INFO L93 Difference]: Finished difference Result 12057 states and 30158 transitions. [2021-07-09 17:13:34,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:34,540 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:34,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:34,564 INFO L225 Difference]: With dead ends: 12057 [2021-07-09 17:13:34,564 INFO L226 Difference]: Without dead ends: 12054 [2021-07-09 17:13:34,565 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 44.1ms TimeCoverageRelationStatistics Valid=46, Invalid=64, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:34,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12054 states. [2021-07-09 17:13:34,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12054 to 10366. [2021-07-09 17:13:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 2.6167872648335746) internal successors, (27123), 10365 states have internal predecessors, (27123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:34,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27123 transitions. [2021-07-09 17:13:34,731 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27123 transitions. Word has length 53 [2021-07-09 17:13:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:34,731 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27123 transitions. [2021-07-09 17:13:34,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:34,731 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27123 transitions. [2021-07-09 17:13:34,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:34,740 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:34,740 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:34,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-07-09 17:13:34,953 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:34,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:34,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1521224621, now seen corresponding path program 175 times [2021-07-09 17:13:34,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:34,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083825786] [2021-07-09 17:13:34,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:34,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:35,009 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:35,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:35,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083825786] [2021-07-09 17:13:35,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083825786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:35,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [20812105] [2021-07-09 17:13:35,009 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:35,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:35,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:35,098 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:35,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [20812105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:35,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:35,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:13:35,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792428476] [2021-07-09 17:13:35,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:35,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:35,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:35,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:35,099 INFO L87 Difference]: Start difference. First operand 10366 states and 27123 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:35,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:35,279 INFO L93 Difference]: Finished difference Result 12079 states and 30151 transitions. [2021-07-09 17:13:35,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:35,279 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:35,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:35,296 INFO L225 Difference]: With dead ends: 12079 [2021-07-09 17:13:35,296 INFO L226 Difference]: Without dead ends: 12061 [2021-07-09 17:13:35,296 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 66.4ms TimeCoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:35,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12061 states. [2021-07-09 17:13:35,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12061 to 10366. [2021-07-09 17:13:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10366 states, 10365 states have (on average 2.6144717800289436) internal successors, (27099), 10365 states have internal predecessors, (27099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:35,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10366 states to 10366 states and 27099 transitions. [2021-07-09 17:13:35,467 INFO L78 Accepts]: Start accepts. Automaton has 10366 states and 27099 transitions. Word has length 53 [2021-07-09 17:13:35,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:35,467 INFO L482 AbstractCegarLoop]: Abstraction has 10366 states and 27099 transitions. [2021-07-09 17:13:35,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:35,467 INFO L276 IsEmpty]: Start isEmpty. Operand 10366 states and 27099 transitions. [2021-07-09 17:13:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:35,479 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:35,479 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:35,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:35,681 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:35,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:35,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1325742662, now seen corresponding path program 176 times [2021-07-09 17:13:35,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:35,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077354900] [2021-07-09 17:13:35,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:35,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:35,757 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:35,757 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077354900] [2021-07-09 17:13:35,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077354900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:35,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497515543] [2021-07-09 17:13:35,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:35,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:35,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:35,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:35,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:35,872 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:35,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497515543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:35,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:35,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:13:35,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338445291] [2021-07-09 17:13:35,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:35,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:35,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:35,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:35,873 INFO L87 Difference]: Start difference. First operand 10366 states and 27099 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:36,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:36,526 INFO L93 Difference]: Finished difference Result 11156 states and 28494 transitions. [2021-07-09 17:13:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:36,526 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:36,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:36,544 INFO L225 Difference]: With dead ends: 11156 [2021-07-09 17:13:36,545 INFO L226 Difference]: Without dead ends: 11082 [2021-07-09 17:13:36,545 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 128.8ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:36,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11082 states. [2021-07-09 17:13:36,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11082 to 10344. [2021-07-09 17:13:36,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10344 states, 10343 states have (on average 2.61026781398047) internal successors, (26998), 10343 states have internal predecessors, (26998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:36,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10344 states to 10344 states and 26998 transitions. [2021-07-09 17:13:36,720 INFO L78 Accepts]: Start accepts. Automaton has 10344 states and 26998 transitions. Word has length 53 [2021-07-09 17:13:36,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:36,721 INFO L482 AbstractCegarLoop]: Abstraction has 10344 states and 26998 transitions. [2021-07-09 17:13:36,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:36,721 INFO L276 IsEmpty]: Start isEmpty. Operand 10344 states and 26998 transitions. [2021-07-09 17:13:36,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:36,733 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:36,733 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:36,949 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable629,312 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:36,949 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:36,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:36,949 INFO L82 PathProgramCache]: Analyzing trace with hash 712206482, now seen corresponding path program 177 times [2021-07-09 17:13:36,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:36,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498816230] [2021-07-09 17:13:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:36,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:37,029 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:37,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498816230] [2021-07-09 17:13:37,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498816230] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:37,029 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637465159] [2021-07-09 17:13:37,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:37,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 17:13:37,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:37,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:37,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:37,218 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:37,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637465159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:37,218 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:37,218 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:37,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553219105] [2021-07-09 17:13:37,218 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:37,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:37,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:37,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:37,219 INFO L87 Difference]: Start difference. First operand 10344 states and 26998 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:37,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:37,656 INFO L93 Difference]: Finished difference Result 11598 states and 29476 transitions. [2021-07-09 17:13:37,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:37,656 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:37,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:37,676 INFO L225 Difference]: With dead ends: 11598 [2021-07-09 17:13:37,677 INFO L226 Difference]: Without dead ends: 11586 [2021-07-09 17:13:37,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:37,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11586 states. [2021-07-09 17:13:37,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11586 to 10414. [2021-07-09 17:13:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10414 states, 10413 states have (on average 2.6087582829155864) internal successors, (27165), 10413 states have internal predecessors, (27165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:37,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10414 states to 10414 states and 27165 transitions. [2021-07-09 17:13:37,865 INFO L78 Accepts]: Start accepts. Automaton has 10414 states and 27165 transitions. Word has length 53 [2021-07-09 17:13:37,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:37,865 INFO L482 AbstractCegarLoop]: Abstraction has 10414 states and 27165 transitions. [2021-07-09 17:13:37,865 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:37,865 INFO L276 IsEmpty]: Start isEmpty. Operand 10414 states and 27165 transitions. [2021-07-09 17:13:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:37,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:37,877 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:38,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-07-09 17:13:38,083 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:38,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:38,083 INFO L82 PathProgramCache]: Analyzing trace with hash -1440843480, now seen corresponding path program 178 times [2021-07-09 17:13:38,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:38,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170966567] [2021-07-09 17:13:38,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:38,164 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:38,164 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:38,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170966567] [2021-07-09 17:13:38,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170966567] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:38,164 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82523269] [2021-07-09 17:13:38,164 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 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:38,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:38,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:38,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:38,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:38,266 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:38,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82523269] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:38,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:38,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:38,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821110204] [2021-07-09 17:13:38,266 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:38,266 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:38,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:38,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:38,267 INFO L87 Difference]: Start difference. First operand 10414 states and 27165 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:38,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:38,874 INFO L93 Difference]: Finished difference Result 13130 states and 32846 transitions. [2021-07-09 17:13:38,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:13:38,875 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:38,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:38,899 INFO L225 Difference]: With dead ends: 13130 [2021-07-09 17:13:38,899 INFO L226 Difference]: Without dead ends: 13076 [2021-07-09 17:13:38,899 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:13:38,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13076 states. [2021-07-09 17:13:39,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13076 to 10595. [2021-07-09 17:13:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 2.60911836888805) internal successors, (27641), 10594 states have internal predecessors, (27641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:39,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27641 transitions. [2021-07-09 17:13:39,089 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27641 transitions. Word has length 53 [2021-07-09 17:13:39,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:39,089 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27641 transitions. [2021-07-09 17:13:39,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:39,089 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27641 transitions. [2021-07-09 17:13:39,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:39,099 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:39,099 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:39,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable631 [2021-07-09 17:13:39,314 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:39,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:39,315 INFO L82 PathProgramCache]: Analyzing trace with hash 91715629, now seen corresponding path program 179 times [2021-07-09 17:13:39,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:39,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087382209] [2021-07-09 17:13:39,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:39,380 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:39,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:39,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087382209] [2021-07-09 17:13:39,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087382209] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:39,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633439899] [2021-07-09 17:13:39,380 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 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:39,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:13:39,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:39,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:39,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:39,507 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 96 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:39,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633439899] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:39,507 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:39,507 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 15 [2021-07-09 17:13:39,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552638284] [2021-07-09 17:13:39,508 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:39,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:39,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:39,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:39,508 INFO L87 Difference]: Start difference. First operand 10595 states and 27641 transitions. Second operand has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:39,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:39,809 INFO L93 Difference]: Finished difference Result 12473 states and 30997 transitions. [2021-07-09 17:13:39,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:13:39,810 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:39,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:39,832 INFO L225 Difference]: With dead ends: 12473 [2021-07-09 17:13:39,832 INFO L226 Difference]: Without dead ends: 12449 [2021-07-09 17:13:39,832 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 102.0ms TimeCoverageRelationStatistics Valid=98, Invalid=244, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:13:39,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12449 states. [2021-07-09 17:13:39,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12449 to 10595. [2021-07-09 17:13:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10595 states, 10594 states have (on average 2.6075136869926374) internal successors, (27624), 10594 states have internal predecessors, (27624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:40,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10595 states to 10595 states and 27624 transitions. [2021-07-09 17:13:40,019 INFO L78 Accepts]: Start accepts. Automaton has 10595 states and 27624 transitions. Word has length 53 [2021-07-09 17:13:40,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:40,019 INFO L482 AbstractCegarLoop]: Abstraction has 10595 states and 27624 transitions. [2021-07-09 17:13:40,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.5625) internal successors, (73), 15 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:40,020 INFO L276 IsEmpty]: Start isEmpty. Operand 10595 states and 27624 transitions. [2021-07-09 17:13:40,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:40,030 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:40,030 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:40,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:40,234 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:40,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:40,234 INFO L82 PathProgramCache]: Analyzing trace with hash -1286006946, now seen corresponding path program 180 times [2021-07-09 17:13:40,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:40,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161133215] [2021-07-09 17:13:40,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:40,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:40,323 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:40,323 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:40,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161133215] [2021-07-09 17:13:40,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161133215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:40,323 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735639378] [2021-07-09 17:13:40,323 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 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:40,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-09 17:13:40,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:40,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:40,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:40,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735639378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:40,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:40,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:13:40,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613235840] [2021-07-09 17:13:40,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:40,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:40,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:40,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:40,438 INFO L87 Difference]: Start difference. First operand 10595 states and 27624 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:41,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:41,248 INFO L93 Difference]: Finished difference Result 15502 states and 38128 transitions. [2021-07-09 17:13:41,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-09 17:13:41,248 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:41,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:41,276 INFO L225 Difference]: With dead ends: 15502 [2021-07-09 17:13:41,276 INFO L226 Difference]: Without dead ends: 15388 [2021-07-09 17:13:41,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=177, Invalid=1155, Unknown=0, NotChecked=0, Total=1332 [2021-07-09 17:13:41,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15388 states. [2021-07-09 17:13:41,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15388 to 10752. [2021-07-09 17:13:41,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10752 states, 10751 states have (on average 2.607943447121198) internal successors, (28038), 10751 states have internal predecessors, (28038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10752 states to 10752 states and 28038 transitions. [2021-07-09 17:13:41,496 INFO L78 Accepts]: Start accepts. Automaton has 10752 states and 28038 transitions. Word has length 53 [2021-07-09 17:13:41,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:41,496 INFO L482 AbstractCegarLoop]: Abstraction has 10752 states and 28038 transitions. [2021-07-09 17:13:41,496 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:41,496 INFO L276 IsEmpty]: Start isEmpty. Operand 10752 states and 28038 transitions. [2021-07-09 17:13:41,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:41,506 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:41,506 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:41,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:41,722 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:41,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:41,722 INFO L82 PathProgramCache]: Analyzing trace with hash -899404269, now seen corresponding path program 181 times [2021-07-09 17:13:41,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:41,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444275364] [2021-07-09 17:13:41,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:41,797 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:41,798 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:41,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444275364] [2021-07-09 17:13:41,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444275364] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:41,798 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112601246] [2021-07-09 17:13:41,798 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 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:41,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:41,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:41,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 39 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:41,918 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112601246] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:41,918 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:41,918 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:13:41,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616619568] [2021-07-09 17:13:41,918 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:41,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:41,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:41,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:41,918 INFO L87 Difference]: Start difference. First operand 10752 states and 28038 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:42,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:42,148 INFO L93 Difference]: Finished difference Result 12521 states and 31155 transitions. [2021-07-09 17:13:42,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:42,148 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:42,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:42,170 INFO L225 Difference]: With dead ends: 12521 [2021-07-09 17:13:42,170 INFO L226 Difference]: Without dead ends: 12488 [2021-07-09 17:13:42,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 94.0ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:42,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12488 states. [2021-07-09 17:13:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12488 to 10400. [2021-07-09 17:13:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10400 states, 10399 states have (on average 2.5997692085777477) internal successors, (27035), 10399 states have internal predecessors, (27035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:42,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10400 states to 10400 states and 27035 transitions. [2021-07-09 17:13:42,360 INFO L78 Accepts]: Start accepts. Automaton has 10400 states and 27035 transitions. Word has length 53 [2021-07-09 17:13:42,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:42,360 INFO L482 AbstractCegarLoop]: Abstraction has 10400 states and 27035 transitions. [2021-07-09 17:13:42,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:42,360 INFO L276 IsEmpty]: Start isEmpty. Operand 10400 states and 27035 transitions. [2021-07-09 17:13:42,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:42,370 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:42,370 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:42,584 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable637,317 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:42,585 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:42,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:42,585 INFO L82 PathProgramCache]: Analyzing trace with hash -1345698456, now seen corresponding path program 182 times [2021-07-09 17:13:42,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:42,585 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954682215] [2021-07-09 17:13:42,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:42,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:42,680 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:42,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:42,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954682215] [2021-07-09 17:13:42,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954682215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:42,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518936772] [2021-07-09 17:13:42,681 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 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:42,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:42,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:42,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:42,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:42,770 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:42,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518936772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:42,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:42,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:13:42,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012554876] [2021-07-09 17:13:42,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:42,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:42,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:42,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:42,771 INFO L87 Difference]: Start difference. First operand 10400 states and 27035 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:43,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:43,363 INFO L93 Difference]: Finished difference Result 14179 states and 34868 transitions. [2021-07-09 17:13:43,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:13:43,363 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:43,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:43,388 INFO L225 Difference]: With dead ends: 14179 [2021-07-09 17:13:43,388 INFO L226 Difference]: Without dead ends: 14023 [2021-07-09 17:13:43,389 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 212.5ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:13:43,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14023 states. [2021-07-09 17:13:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14023 to 10040. [2021-07-09 17:13:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10040 states, 10039 states have (on average 2.592887737822492) internal successors, (26030), 10039 states have internal predecessors, (26030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:43,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10040 states to 10040 states and 26030 transitions. [2021-07-09 17:13:43,594 INFO L78 Accepts]: Start accepts. Automaton has 10040 states and 26030 transitions. Word has length 53 [2021-07-09 17:13:43,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:43,594 INFO L482 AbstractCegarLoop]: Abstraction has 10040 states and 26030 transitions. [2021-07-09 17:13:43,594 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:43,594 INFO L276 IsEmpty]: Start isEmpty. Operand 10040 states and 26030 transitions. [2021-07-09 17:13:43,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:43,603 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:43,603 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:43,817 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable642 [2021-07-09 17:13:43,817 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:43,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:43,817 INFO L82 PathProgramCache]: Analyzing trace with hash -1583759973, now seen corresponding path program 86 times [2021-07-09 17:13:43,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:43,817 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970453803] [2021-07-09 17:13:43,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:43,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:43,886 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:43,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:43,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970453803] [2021-07-09 17:13:43,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970453803] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:43,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903660966] [2021-07-09 17:13:43,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:43,918 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:43,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:43,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:43,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:43,993 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:43,993 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903660966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:43,993 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:43,993 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:13:43,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413387925] [2021-07-09 17:13:43,993 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:43,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:43,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:43,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=78, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:43,993 INFO L87 Difference]: Start difference. First operand 10040 states and 26030 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:44,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:44,216 INFO L93 Difference]: Finished difference Result 12926 states and 32056 transitions. [2021-07-09 17:13:44,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:13:44,217 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:44,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:44,235 INFO L225 Difference]: With dead ends: 12926 [2021-07-09 17:13:44,236 INFO L226 Difference]: Without dead ends: 12912 [2021-07-09 17:13:44,236 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 73.6ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12912 states. [2021-07-09 17:13:44,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12912 to 10415. [2021-07-09 17:13:44,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10415 states, 10414 states have (on average 2.6024582293067025) internal successors, (27102), 10414 states have internal predecessors, (27102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:44,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10415 states to 10415 states and 27102 transitions. [2021-07-09 17:13:44,396 INFO L78 Accepts]: Start accepts. Automaton has 10415 states and 27102 transitions. Word has length 53 [2021-07-09 17:13:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:44,396 INFO L482 AbstractCegarLoop]: Abstraction has 10415 states and 27102 transitions. [2021-07-09 17:13:44,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 10415 states and 27102 transitions. [2021-07-09 17:13:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:44,405 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:44,405 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:44,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-07-09 17:13:44,620 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:44,620 INFO L82 PathProgramCache]: Analyzing trace with hash 2089326913, now seen corresponding path program 87 times [2021-07-09 17:13:44,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:44,620 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932961974] [2021-07-09 17:13:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:44,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:44,712 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:44,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:44,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932961974] [2021-07-09 17:13:44,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932961974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:44,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [77631335] [2021-07-09 17:13:44,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:44,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 17:13:44,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:44,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:13:44,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:44,903 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 109 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:44,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [77631335] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:44,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:44,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-07-09 17:13:44,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082825148] [2021-07-09 17:13:44,904 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:44,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:44,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:44,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:44,904 INFO L87 Difference]: Start difference. First operand 10415 states and 27102 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:45,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:45,199 INFO L93 Difference]: Finished difference Result 13428 states and 33227 transitions. [2021-07-09 17:13:45,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:45,199 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:45,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:45,224 INFO L225 Difference]: With dead ends: 13428 [2021-07-09 17:13:45,224 INFO L226 Difference]: Without dead ends: 13428 [2021-07-09 17:13:45,224 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 125.5ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:13:45,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13428 states. [2021-07-09 17:13:45,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13428 to 10022. [2021-07-09 17:13:45,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 2.595150184612314) internal successors, (26006), 10021 states have internal predecessors, (26006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:45,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 26006 transitions. [2021-07-09 17:13:45,416 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 26006 transitions. Word has length 53 [2021-07-09 17:13:45,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:45,416 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 26006 transitions. [2021-07-09 17:13:45,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:45,416 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 26006 transitions. [2021-07-09 17:13:45,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:45,426 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:45,426 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:45,642 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable645 [2021-07-09 17:13:45,642 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:45,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:45,642 INFO L82 PathProgramCache]: Analyzing trace with hash 547874413, now seen corresponding path program 183 times [2021-07-09 17:13:45,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:45,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408022464] [2021-07-09 17:13:45,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:45,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:45,729 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:45,729 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408022464] [2021-07-09 17:13:45,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408022464] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:45,729 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [627267159] [2021-07-09 17:13:45,729 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 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:45,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:13:45,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:45,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:45,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:45,853 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 47 proven. 88 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:45,854 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [627267159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:45,854 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:45,854 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:13:45,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964704768] [2021-07-09 17:13:45,854 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:45,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:45,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:45,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:45,854 INFO L87 Difference]: Start difference. First operand 10022 states and 26006 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:46,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:46,070 INFO L93 Difference]: Finished difference Result 11503 states and 28619 transitions. [2021-07-09 17:13:46,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:13:46,070 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:46,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:46,089 INFO L225 Difference]: With dead ends: 11503 [2021-07-09 17:13:46,089 INFO L226 Difference]: Without dead ends: 11467 [2021-07-09 17:13:46,089 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 116.2ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:13:46,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11467 states. [2021-07-09 17:13:46,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11467 to 10022. [2021-07-09 17:13:46,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10022 states, 10021 states have (on average 2.5942520706516317) internal successors, (25997), 10021 states have internal predecessors, (25997), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:46,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10022 states to 10022 states and 25997 transitions. [2021-07-09 17:13:46,268 INFO L78 Accepts]: Start accepts. Automaton has 10022 states and 25997 transitions. Word has length 53 [2021-07-09 17:13:46,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:46,268 INFO L482 AbstractCegarLoop]: Abstraction has 10022 states and 25997 transitions. [2021-07-09 17:13:46,269 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:46,269 INFO L276 IsEmpty]: Start isEmpty. Operand 10022 states and 25997 transitions. [2021-07-09 17:13:46,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:46,280 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:46,280 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:46,480 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable648,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:46,481 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:46,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:46,481 INFO L82 PathProgramCache]: Analyzing trace with hash 355684522, now seen corresponding path program 88 times [2021-07-09 17:13:46,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:46,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950331657] [2021-07-09 17:13:46,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:46,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:46,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950331657] [2021-07-09 17:13:46,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950331657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:46,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928563179] [2021-07-09 17:13:46,567 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 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:46,594 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:46,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:46,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:46,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:46,668 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:46,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1928563179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:46,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:46,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:46,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296409137] [2021-07-09 17:13:46,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:46,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:46,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:46,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:46,669 INFO L87 Difference]: Start difference. First operand 10022 states and 25997 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:47,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:47,152 INFO L93 Difference]: Finished difference Result 11456 states and 28845 transitions. [2021-07-09 17:13:47,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:47,153 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:47,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:47,180 INFO L225 Difference]: With dead ends: 11456 [2021-07-09 17:13:47,180 INFO L226 Difference]: Without dead ends: 11434 [2021-07-09 17:13:47,180 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 129.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11434 states. [2021-07-09 17:13:47,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11434 to 10210. [2021-07-09 17:13:47,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10210 states, 10209 states have (on average 2.591928690371241) internal successors, (26461), 10209 states have internal predecessors, (26461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:47,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10210 states to 10210 states and 26461 transitions. [2021-07-09 17:13:47,382 INFO L78 Accepts]: Start accepts. Automaton has 10210 states and 26461 transitions. Word has length 53 [2021-07-09 17:13:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:47,382 INFO L482 AbstractCegarLoop]: Abstraction has 10210 states and 26461 transitions. [2021-07-09 17:13:47,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 10210 states and 26461 transitions. [2021-07-09 17:13:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:47,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:47,392 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:47,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable654 [2021-07-09 17:13:47,608 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:47,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:47,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1198012335, now seen corresponding path program 184 times [2021-07-09 17:13:47,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:47,608 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734136879] [2021-07-09 17:13:47,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:47,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:47,660 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:47,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734136879] [2021-07-09 17:13:47,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734136879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:47,660 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419650541] [2021-07-09 17:13:47,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:47,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:47,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:47,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:47,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:47,804 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:47,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419650541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:47,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:47,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:13:47,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1925200971] [2021-07-09 17:13:47,805 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:13:47,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:47,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:13:47,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:13:47,805 INFO L87 Difference]: Start difference. First operand 10210 states and 26461 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:47,962 INFO L93 Difference]: Finished difference Result 11989 states and 29653 transitions. [2021-07-09 17:13:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:13:47,963 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:47,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:47,985 INFO L225 Difference]: With dead ends: 11989 [2021-07-09 17:13:47,985 INFO L226 Difference]: Without dead ends: 11986 [2021-07-09 17:13:47,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 46.5ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:47,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11986 states. [2021-07-09 17:13:48,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11986 to 10202. [2021-07-09 17:13:48,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 2.5904323105577887) internal successors, (26425), 10201 states have internal predecessors, (26425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26425 transitions. [2021-07-09 17:13:48,175 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26425 transitions. Word has length 53 [2021-07-09 17:13:48,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:48,175 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26425 transitions. [2021-07-09 17:13:48,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:48,175 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26425 transitions. [2021-07-09 17:13:48,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:48,185 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:48,185 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:48,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:48,401 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:48,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:48,401 INFO L82 PathProgramCache]: Analyzing trace with hash -990949769, now seen corresponding path program 185 times [2021-07-09 17:13:48,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:48,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291541325] [2021-07-09 17:13:48,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 87 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:48,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:48,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291541325] [2021-07-09 17:13:48,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291541325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:48,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715603239] [2021-07-09 17:13:48,458 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 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:48,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 17:13:48,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:48,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:48,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 48 proven. 87 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:13:48,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715603239] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:48,575 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:48,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 13 [2021-07-09 17:13:48,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942122019] [2021-07-09 17:13:48,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:48,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:48,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:48,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:48,576 INFO L87 Difference]: Start difference. First operand 10202 states and 26425 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:48,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:48,811 INFO L93 Difference]: Finished difference Result 12152 states and 29947 transitions. [2021-07-09 17:13:48,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:13:48,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:48,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:48,834 INFO L225 Difference]: With dead ends: 12152 [2021-07-09 17:13:48,835 INFO L226 Difference]: Without dead ends: 12134 [2021-07-09 17:13:48,835 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 85.2ms TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:48,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12134 states. [2021-07-09 17:13:49,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12134 to 10202. [2021-07-09 17:13:49,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10202 states, 10201 states have (on average 2.5880796000392117) internal successors, (26401), 10201 states have internal predecessors, (26401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10202 states to 10202 states and 26401 transitions. [2021-07-09 17:13:49,036 INFO L78 Accepts]: Start accepts. Automaton has 10202 states and 26401 transitions. Word has length 53 [2021-07-09 17:13:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:49,036 INFO L482 AbstractCegarLoop]: Abstraction has 10202 states and 26401 transitions. [2021-07-09 17:13:49,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 10202 states and 26401 transitions. [2021-07-09 17:13:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:49,047 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:49,047 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:49,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable657 [2021-07-09 17:13:49,263 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:49,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:49,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1856017514, now seen corresponding path program 186 times [2021-07-09 17:13:49,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:49,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489272608] [2021-07-09 17:13:49,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:49,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:49,340 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:49,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:49,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489272608] [2021-07-09 17:13:49,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489272608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:49,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126312266] [2021-07-09 17:13:49,340 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 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:49,374 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-09 17:13:49,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:49,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:49,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:49,462 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:49,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126312266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:49,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:49,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:13:49,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834489888] [2021-07-09 17:13:49,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:49,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:49,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:49,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:49,463 INFO L87 Difference]: Start difference. First operand 10202 states and 26401 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:50,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:50,087 INFO L93 Difference]: Finished difference Result 11006 states and 27812 transitions. [2021-07-09 17:13:50,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:50,088 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:50,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:50,105 INFO L225 Difference]: With dead ends: 11006 [2021-07-09 17:13:50,106 INFO L226 Difference]: Without dead ends: 10914 [2021-07-09 17:13:50,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:50,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10914 states. [2021-07-09 17:13:50,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10914 to 10195. [2021-07-09 17:13:50,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10195 states, 10194 states have (on average 2.581518540317834) internal successors, (26316), 10194 states have internal predecessors, (26316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:50,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10195 states to 10195 states and 26316 transitions. [2021-07-09 17:13:50,250 INFO L78 Accepts]: Start accepts. Automaton has 10195 states and 26316 transitions. Word has length 53 [2021-07-09 17:13:50,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:50,250 INFO L482 AbstractCegarLoop]: Abstraction has 10195 states and 26316 transitions. [2021-07-09 17:13:50,250 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:50,250 INFO L276 IsEmpty]: Start isEmpty. Operand 10195 states and 26316 transitions. [2021-07-09 17:13:50,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:50,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:50,258 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:50,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable660,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:50,474 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:50,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:50,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1242481334, now seen corresponding path program 187 times [2021-07-09 17:13:50,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:50,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886058978] [2021-07-09 17:13:50,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:50,558 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886058978] [2021-07-09 17:13:50,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886058978] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:50,558 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389297271] [2021-07-09 17:13:50,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:50,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:50,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:13:50,665 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389297271] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:50,665 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:50,665 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:13:50,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436327497] [2021-07-09 17:13:50,665 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:13:50,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:50,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:13:50,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:13:50,666 INFO L87 Difference]: Start difference. First operand 10195 states and 26316 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:51,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:51,100 INFO L93 Difference]: Finished difference Result 11506 states and 28913 transitions. [2021-07-09 17:13:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:13:51,101 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:51,118 INFO L225 Difference]: With dead ends: 11506 [2021-07-09 17:13:51,119 INFO L226 Difference]: Without dead ends: 11494 [2021-07-09 17:13:51,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 126.5ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:51,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11494 states. [2021-07-09 17:13:51,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11494 to 10289. [2021-07-09 17:13:51,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10289 states, 10288 states have (on average 2.5804821150855366) internal successors, (26548), 10288 states have internal predecessors, (26548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:51,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10289 states to 10289 states and 26548 transitions. [2021-07-09 17:13:51,282 INFO L78 Accepts]: Start accepts. Automaton has 10289 states and 26548 transitions. Word has length 53 [2021-07-09 17:13:51,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:51,282 INFO L482 AbstractCegarLoop]: Abstraction has 10289 states and 26548 transitions. [2021-07-09 17:13:51,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:51,283 INFO L276 IsEmpty]: Start isEmpty. Operand 10289 states and 26548 transitions. [2021-07-09 17:13:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:51,293 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:51,293 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:51,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable661 [2021-07-09 17:13:51,508 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:51,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:51,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1085181847, now seen corresponding path program 89 times [2021-07-09 17:13:51,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:51,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744673981] [2021-07-09 17:13:51,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 87 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:51,567 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744673981] [2021-07-09 17:13:51,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744673981] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:51,567 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043623336] [2021-07-09 17:13:51,567 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 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:51,598 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 17:13:51,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:51,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:51,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:51,686 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:13:51,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043623336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:51,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:51,686 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-07-09 17:13:51,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506240110] [2021-07-09 17:13:51,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:51,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:51,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:51,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:51,687 INFO L87 Difference]: Start difference. First operand 10289 states and 26548 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:51,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:51,912 INFO L93 Difference]: Finished difference Result 12783 states and 31677 transitions. [2021-07-09 17:13:51,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:13:51,912 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:51,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:51,934 INFO L225 Difference]: With dead ends: 12783 [2021-07-09 17:13:51,934 INFO L226 Difference]: Without dead ends: 12763 [2021-07-09 17:13:51,934 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 85.0ms TimeCoverageRelationStatistics Valid=101, Invalid=171, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:13:51,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-07-09 17:13:52,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 10650. [2021-07-09 17:13:52,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10650 states, 10649 states have (on average 2.5842802141046106) internal successors, (27520), 10649 states have internal predecessors, (27520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:52,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10650 states to 10650 states and 27520 transitions. [2021-07-09 17:13:52,131 INFO L78 Accepts]: Start accepts. Automaton has 10650 states and 27520 transitions. Word has length 53 [2021-07-09 17:13:52,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:52,132 INFO L482 AbstractCegarLoop]: Abstraction has 10650 states and 27520 transitions. [2021-07-09 17:13:52,132 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:52,132 INFO L276 IsEmpty]: Start isEmpty. Operand 10650 states and 27520 transitions. [2021-07-09 17:13:52,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:52,142 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:52,142 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:52,357 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 327 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable662 [2021-07-09 17:13:52,357 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:52,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:52,357 INFO L82 PathProgramCache]: Analyzing trace with hash -910568628, now seen corresponding path program 188 times [2021-07-09 17:13:52,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:52,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907510609] [2021-07-09 17:13:52,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:52,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:52,437 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:52,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:52,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907510609] [2021-07-09 17:13:52,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [907510609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:52,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911735599] [2021-07-09 17:13:52,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:52,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:13:52,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:52,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:52,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:52,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911735599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:52,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:52,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:13:52,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837340336] [2021-07-09 17:13:52,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:52,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:52,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:52,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:52,541 INFO L87 Difference]: Start difference. First operand 10650 states and 27520 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:53,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:53,189 INFO L93 Difference]: Finished difference Result 13521 states and 33551 transitions. [2021-07-09 17:13:53,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:13:53,189 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:53,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:53,212 INFO L225 Difference]: With dead ends: 13521 [2021-07-09 17:13:53,212 INFO L226 Difference]: Without dead ends: 13467 [2021-07-09 17:13:53,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 212.4ms TimeCoverageRelationStatistics Valid=99, Invalid=603, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:13:53,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13467 states. [2021-07-09 17:13:53,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13467 to 10945. [2021-07-09 17:13:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 10944 states have (on average 2.5868055555555554) internal successors, (28310), 10944 states have internal predecessors, (28310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:53,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28310 transitions. [2021-07-09 17:13:53,422 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28310 transitions. Word has length 53 [2021-07-09 17:13:53,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:53,422 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28310 transitions. [2021-07-09 17:13:53,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:53,423 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28310 transitions. [2021-07-09 17:13:53,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:53,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:53,434 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:53,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:53,639 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:53,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:53,640 INFO L82 PathProgramCache]: Analyzing trace with hash 621990481, now seen corresponding path program 189 times [2021-07-09 17:13:53,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:53,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581723976] [2021-07-09 17:13:53,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:53,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:53,712 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:53,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:53,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581723976] [2021-07-09 17:13:53,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581723976] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:53,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735493997] [2021-07-09 17:13:53,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:53,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:13:53,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:53,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:53,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:53,819 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:53,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735493997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:53,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:53,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:13:53,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012351980] [2021-07-09 17:13:53,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:13:53,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:53,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:13:53,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:13:53,820 INFO L87 Difference]: Start difference. First operand 10945 states and 28310 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:54,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:54,034 INFO L93 Difference]: Finished difference Result 12806 states and 31626 transitions. [2021-07-09 17:13:54,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:13:54,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:54,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:54,058 INFO L225 Difference]: With dead ends: 12806 [2021-07-09 17:13:54,058 INFO L226 Difference]: Without dead ends: 12782 [2021-07-09 17:13:54,058 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:13:54,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12782 states. [2021-07-09 17:13:54,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12782 to 10945. [2021-07-09 17:13:54,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10945 states, 10944 states have (on average 2.5852521929824563) internal successors, (28293), 10944 states have internal predecessors, (28293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10945 states to 10945 states and 28293 transitions. [2021-07-09 17:13:54,266 INFO L78 Accepts]: Start accepts. Automaton has 10945 states and 28293 transitions. Word has length 53 [2021-07-09 17:13:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:54,266 INFO L482 AbstractCegarLoop]: Abstraction has 10945 states and 28293 transitions. [2021-07-09 17:13:54,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 10945 states and 28293 transitions. [2021-07-09 17:13:54,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:54,276 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:54,276 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:54,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable666 [2021-07-09 17:13:54,477 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:54,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:54,477 INFO L82 PathProgramCache]: Analyzing trace with hash -755732094, now seen corresponding path program 190 times [2021-07-09 17:13:54,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:54,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20249125] [2021-07-09 17:13:54,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:54,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:54,572 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:54,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20249125] [2021-07-09 17:13:54,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20249125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:54,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914459959] [2021-07-09 17:13:54,573 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:54,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:13:54,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:54,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:54,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:54,672 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:54,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914459959] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:54,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:54,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:13:54,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599787357] [2021-07-09 17:13:54,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:13:54,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:54,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:13:54,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:13:54,675 INFO L87 Difference]: Start difference. First operand 10945 states and 28293 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:55,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:55,485 INFO L93 Difference]: Finished difference Result 17261 states and 41917 transitions. [2021-07-09 17:13:55,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:13:55,485 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:55,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:55,512 INFO L225 Difference]: With dead ends: 17261 [2021-07-09 17:13:55,512 INFO L226 Difference]: Without dead ends: 17081 [2021-07-09 17:13:55,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 366.4ms TimeCoverageRelationStatistics Valid=225, Invalid=1581, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:13:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17081 states. [2021-07-09 17:13:55,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17081 to 11484. [2021-07-09 17:13:55,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 2.586432117042585) internal successors, (29700), 11483 states have internal predecessors, (29700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:55,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29700 transitions. [2021-07-09 17:13:55,721 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29700 transitions. Word has length 53 [2021-07-09 17:13:55,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:55,721 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29700 transitions. [2021-07-09 17:13:55,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:55,721 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29700 transitions. [2021-07-09 17:13:55,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:55,731 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:55,731 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:55,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable670,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:55,949 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:55,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:55,949 INFO L82 PathProgramCache]: Analyzing trace with hash -369129417, now seen corresponding path program 191 times [2021-07-09 17:13:55,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:55,949 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762512652] [2021-07-09 17:13:55,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:55,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:56,054 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:56,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:56,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762512652] [2021-07-09 17:13:56,054 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762512652] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:56,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656478274] [2021-07-09 17:13:56,054 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:56,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:13:56,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:56,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:56,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 34 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:56,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656478274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:56,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:56,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-07-09 17:13:56,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214465734] [2021-07-09 17:13:56,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:13:56,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:56,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:13:56,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:13:56,179 INFO L87 Difference]: Start difference. First operand 11484 states and 29700 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:56,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:56,457 INFO L93 Difference]: Finished difference Result 13565 states and 33450 transitions. [2021-07-09 17:13:56,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:13:56,457 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:56,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:56,482 INFO L225 Difference]: With dead ends: 13565 [2021-07-09 17:13:56,482 INFO L226 Difference]: Without dead ends: 13532 [2021-07-09 17:13:56,483 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 127.4ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:13:56,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13532 states. [2021-07-09 17:13:56,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13532 to 11484. [2021-07-09 17:13:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11484 states, 11483 states have (on average 2.58564834973439) internal successors, (29691), 11483 states have internal predecessors, (29691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:56,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11484 states to 11484 states and 29691 transitions. [2021-07-09 17:13:56,696 INFO L78 Accepts]: Start accepts. Automaton has 11484 states and 29691 transitions. Word has length 53 [2021-07-09 17:13:56,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:56,696 INFO L482 AbstractCegarLoop]: Abstraction has 11484 states and 29691 transitions. [2021-07-09 17:13:56,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 15 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:56,696 INFO L276 IsEmpty]: Start isEmpty. Operand 11484 states and 29691 transitions. [2021-07-09 17:13:56,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:56,707 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:56,707 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:56,923 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,331 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:56,923 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:56,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:56,924 INFO L82 PathProgramCache]: Analyzing trace with hash -815423604, now seen corresponding path program 192 times [2021-07-09 17:13:56,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:56,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086131189] [2021-07-09 17:13:56,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:57,020 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:57,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086131189] [2021-07-09 17:13:57,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086131189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:57,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082086306] [2021-07-09 17:13:57,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:57,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-09 17:13:57,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:13:57,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:13:57,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:57,125 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:13:57,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082086306] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:57,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:57,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:13:57,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539770892] [2021-07-09 17:13:57,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:57,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:57,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:57,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:57,126 INFO L87 Difference]: Start difference. First operand 11484 states and 29691 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:58,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:58,545 INFO L93 Difference]: Finished difference Result 21447 states and 51505 transitions. [2021-07-09 17:13:58,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-07-09 17:13:58,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:58,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:58,581 INFO L225 Difference]: With dead ends: 21447 [2021-07-09 17:13:58,582 INFO L226 Difference]: Without dead ends: 21171 [2021-07-09 17:13:58,582 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1425 ImplicationChecksByTransitivity, 715.5ms TimeCoverageRelationStatistics Valid=495, Invalid=3927, Unknown=0, NotChecked=0, Total=4422 [2021-07-09 17:13:58,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21171 states. [2021-07-09 17:13:58,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21171 to 11987. [2021-07-09 17:13:58,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11987 states, 11986 states have (on average 2.5869347572167527) internal successors, (31007), 11986 states have internal predecessors, (31007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:58,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11987 states to 11987 states and 31007 transitions. [2021-07-09 17:13:58,839 INFO L78 Accepts]: Start accepts. Automaton has 11987 states and 31007 transitions. Word has length 53 [2021-07-09 17:13:58,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:58,839 INFO L482 AbstractCegarLoop]: Abstraction has 11987 states and 31007 transitions. [2021-07-09 17:13:58,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:58,839 INFO L276 IsEmpty]: Start isEmpty. Operand 11987 states and 31007 transitions. [2021-07-09 17:13:58,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:58,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:58,849 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:59,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable676,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:59,065 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:59,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:59,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1078149265, now seen corresponding path program 193 times [2021-07-09 17:13:59,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:59,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849507932] [2021-07-09 17:13:59,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:59,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:59,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:13:59,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849507932] [2021-07-09 17:13:59,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849507932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:59,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48537920] [2021-07-09 17:13:59,148 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:13:59,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:13:59,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:13:59,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:13:59,246 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 38 proven. 96 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:13:59,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48537920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:13:59,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:13:59,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:13:59,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822934145] [2021-07-09 17:13:59,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:13:59,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:13:59,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:13:59,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:13:59,247 INFO L87 Difference]: Start difference. First operand 11987 states and 31007 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:59,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:13:59,490 INFO L93 Difference]: Finished difference Result 14020 states and 34646 transitions. [2021-07-09 17:13:59,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:13:59,490 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:13:59,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:13:59,518 INFO L225 Difference]: With dead ends: 14020 [2021-07-09 17:13:59,518 INFO L226 Difference]: Without dead ends: 13978 [2021-07-09 17:13:59,518 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:13:59,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13978 states. [2021-07-09 17:13:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13978 to 11653. [2021-07-09 17:13:59,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11653 states, 11652 states have (on average 2.5810161345691727) internal successors, (30074), 11652 states have internal predecessors, (30074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:59,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11653 states to 11653 states and 30074 transitions. [2021-07-09 17:13:59,741 INFO L78 Accepts]: Start accepts. Automaton has 11653 states and 30074 transitions. Word has length 53 [2021-07-09 17:13:59,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:13:59,741 INFO L482 AbstractCegarLoop]: Abstraction has 11653 states and 30074 transitions. [2021-07-09 17:13:59,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:13:59,742 INFO L276 IsEmpty]: Start isEmpty. Operand 11653 states and 30074 transitions. [2021-07-09 17:13:59,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:13:59,752 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:13:59,752 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:13:59,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-07-09 17:13:59,969 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:13:59,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:13:59,969 INFO L82 PathProgramCache]: Analyzing trace with hash -968737470, now seen corresponding path program 194 times [2021-07-09 17:13:59,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:13:59,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804326896] [2021-07-09 17:13:59,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:13:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:00,077 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:00,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804326896] [2021-07-09 17:14:00,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804326896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:00,077 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478191106] [2021-07-09 17:14:00,078 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 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:00,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:00,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:00,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:00,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:00,178 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:00,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478191106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:00,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:00,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:14:00,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017507746] [2021-07-09 17:14:00,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:14:00,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:00,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:14:00,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:00,179 INFO L87 Difference]: Start difference. First operand 11653 states and 30074 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:00,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:00,899 INFO L93 Difference]: Finished difference Result 16353 states and 39527 transitions. [2021-07-09 17:14:00,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:00,899 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:00,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:00,929 INFO L225 Difference]: With dead ends: 16353 [2021-07-09 17:14:00,929 INFO L226 Difference]: Without dead ends: 15975 [2021-07-09 17:14:00,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 284.6ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:14:00,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15975 states. [2021-07-09 17:14:01,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15975 to 10369. [2021-07-09 17:14:01,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10369 states, 10368 states have (on average 2.568672839506173) internal successors, (26632), 10368 states have internal predecessors, (26632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:01,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10369 states to 10369 states and 26632 transitions. [2021-07-09 17:14:01,145 INFO L78 Accepts]: Start accepts. Automaton has 10369 states and 26632 transitions. Word has length 53 [2021-07-09 17:14:01,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:01,146 INFO L482 AbstractCegarLoop]: Abstraction has 10369 states and 26632 transitions. [2021-07-09 17:14:01,146 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:01,146 INFO L276 IsEmpty]: Start isEmpty. Operand 10369 states and 26632 transitions. [2021-07-09 17:14:01,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:01,156 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:01,156 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:01,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable683,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:01,357 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:01,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:01,357 INFO L82 PathProgramCache]: Analyzing trace with hash -1828679397, now seen corresponding path program 90 times [2021-07-09 17:14:01,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:01,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111414424] [2021-07-09 17:14:01,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:01,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:01,420 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:01,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:01,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111414424] [2021-07-09 17:14:01,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111414424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:01,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809323854] [2021-07-09 17:14:01,420 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:01,450 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-09 17:14:01,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:01,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:01,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:01,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809323854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:01,531 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:01,531 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:14:01,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285849425] [2021-07-09 17:14:01,531 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:01,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:01,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:01,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:01,532 INFO L87 Difference]: Start difference. First operand 10369 states and 26632 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:01,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:01,780 INFO L93 Difference]: Finished difference Result 15824 states and 38717 transitions. [2021-07-09 17:14:01,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:14:01,780 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:01,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:01,812 INFO L225 Difference]: With dead ends: 15824 [2021-07-09 17:14:01,812 INFO L226 Difference]: Without dead ends: 15824 [2021-07-09 17:14:01,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 93.2ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15824 states. [2021-07-09 17:14:02,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15824 to 10590. [2021-07-09 17:14:02,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10590 states, 10589 states have (on average 2.578808197185759) internal successors, (27307), 10589 states have internal predecessors, (27307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:02,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10590 states to 10590 states and 27307 transitions. [2021-07-09 17:14:02,040 INFO L78 Accepts]: Start accepts. Automaton has 10590 states and 27307 transitions. Word has length 53 [2021-07-09 17:14:02,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:02,040 INFO L482 AbstractCegarLoop]: Abstraction has 10590 states and 27307 transitions. [2021-07-09 17:14:02,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:02,040 INFO L276 IsEmpty]: Start isEmpty. Operand 10590 states and 27307 transitions. [2021-07-09 17:14:02,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:02,050 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:02,051 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:02,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable684 [2021-07-09 17:14:02,265 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:02,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:02,265 INFO L82 PathProgramCache]: Analyzing trace with hash 828715443, now seen corresponding path program 91 times [2021-07-09 17:14:02,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:02,265 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091493576] [2021-07-09 17:14:02,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:02,331 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 104 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:02,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:02,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091493576] [2021-07-09 17:14:02,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091493576] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:02,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063211329] [2021-07-09 17:14:02,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:02,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:02,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:02,436 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 105 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:02,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063211329] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:02,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:02,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:14:02,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670168519] [2021-07-09 17:14:02,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:14:02,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:02,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:14:02,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:02,437 INFO L87 Difference]: Start difference. First operand 10590 states and 27307 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:02,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:02,772 INFO L93 Difference]: Finished difference Result 17337 states and 42262 transitions. [2021-07-09 17:14:02,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:14:02,772 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:02,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:02,803 INFO L225 Difference]: With dead ends: 17337 [2021-07-09 17:14:02,804 INFO L226 Difference]: Without dead ends: 17337 [2021-07-09 17:14:02,804 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 132.3ms TimeCoverageRelationStatistics Valid=184, Invalid=278, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:14:02,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17337 states. [2021-07-09 17:14:03,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17337 to 10630. [2021-07-09 17:14:03,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10630 states, 10629 states have (on average 2.5802991814846177) internal successors, (27426), 10629 states have internal predecessors, (27426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:03,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10630 states to 10630 states and 27426 transitions. [2021-07-09 17:14:03,049 INFO L78 Accepts]: Start accepts. Automaton has 10630 states and 27426 transitions. Word has length 53 [2021-07-09 17:14:03,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:03,049 INFO L482 AbstractCegarLoop]: Abstraction has 10630 states and 27426 transitions. [2021-07-09 17:14:03,049 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:03,049 INFO L276 IsEmpty]: Start isEmpty. Operand 10630 states and 27426 transitions. [2021-07-09 17:14:03,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:03,060 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:03,060 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:03,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable685,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:03,273 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:03,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:03,273 INFO L82 PathProgramCache]: Analyzing trace with hash -861279721, now seen corresponding path program 92 times [2021-07-09 17:14:03,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:03,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894497592] [2021-07-09 17:14:03,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:03,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:03,348 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:03,349 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:03,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894497592] [2021-07-09 17:14:03,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894497592] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:03,349 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313798454] [2021-07-09 17:14:03,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:03,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:03,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:03,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:03,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:03,446 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 98 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:03,446 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [313798454] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:03,446 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:03,446 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:14:03,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614244986] [2021-07-09 17:14:03,446 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:14:03,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:03,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:14:03,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:03,447 INFO L87 Difference]: Start difference. First operand 10630 states and 27426 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:03,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:03,827 INFO L93 Difference]: Finished difference Result 17209 states and 41987 transitions. [2021-07-09 17:14:03,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:14:03,828 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:03,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:03,857 INFO L225 Difference]: With dead ends: 17209 [2021-07-09 17:14:03,857 INFO L226 Difference]: Without dead ends: 17209 [2021-07-09 17:14:03,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=233, Invalid=367, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:14:03,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17209 states. [2021-07-09 17:14:04,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17209 to 10659. [2021-07-09 17:14:04,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10659 states, 10658 states have (on average 2.581534997185213) internal successors, (27514), 10658 states have internal predecessors, (27514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:04,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10659 states to 10659 states and 27514 transitions. [2021-07-09 17:14:04,099 INFO L78 Accepts]: Start accepts. Automaton has 10659 states and 27514 transitions. Word has length 53 [2021-07-09 17:14:04,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:04,099 INFO L482 AbstractCegarLoop]: Abstraction has 10659 states and 27514 transitions. [2021-07-09 17:14:04,100 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:04,100 INFO L276 IsEmpty]: Start isEmpty. Operand 10659 states and 27514 transitions. [2021-07-09 17:14:04,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:04,111 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:04,111 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:04,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable686 [2021-07-09 17:14:04,325 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:04,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:04,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1900566733, now seen corresponding path program 93 times [2021-07-09 17:14:04,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:04,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273277083] [2021-07-09 17:14:04,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:04,418 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:04,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:04,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273277083] [2021-07-09 17:14:04,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273277083] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:04,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033907215] [2021-07-09 17:14:04,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:04,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 17:14:04,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:04,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:14:04,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:04,582 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 112 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:04,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1033907215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:04,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:04,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-07-09 17:14:04,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326453724] [2021-07-09 17:14:04,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:14:04,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:04,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:14:04,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:04,583 INFO L87 Difference]: Start difference. First operand 10659 states and 27514 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:04,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:04,917 INFO L93 Difference]: Finished difference Result 12656 states and 31353 transitions. [2021-07-09 17:14:04,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:14:04,917 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:04,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:04,939 INFO L225 Difference]: With dead ends: 12656 [2021-07-09 17:14:04,939 INFO L226 Difference]: Without dead ends: 12656 [2021-07-09 17:14:04,940 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 189.4ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:04,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12656 states. [2021-07-09 17:14:05,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12656 to 10205. [2021-07-09 17:14:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10205 states, 10204 states have (on average 2.5751666013328105) internal successors, (26277), 10204 states have internal predecessors, (26277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:05,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26277 transitions. [2021-07-09 17:14:05,127 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26277 transitions. Word has length 53 [2021-07-09 17:14:05,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:05,127 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26277 transitions. [2021-07-09 17:14:05,127 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:05,127 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26277 transitions. [2021-07-09 17:14:05,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:05,137 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:05,137 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:05,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-07-09 17:14:05,341 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:05,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:05,341 INFO L82 PathProgramCache]: Analyzing trace with hash -219319817, now seen corresponding path program 195 times [2021-07-09 17:14:05,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:05,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537138355] [2021-07-09 17:14:05,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:05,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:05,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:05,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537138355] [2021-07-09 17:14:05,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537138355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:05,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231062812] [2021-07-09 17:14:05,441 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 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:05,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-07-09 17:14:05,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:05,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:05,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 49 proven. 86 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:05,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231062812] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:05,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:05,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:14:05,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043883666] [2021-07-09 17:14:05,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:14:05,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:05,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:14:05,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:05,549 INFO L87 Difference]: Start difference. First operand 10205 states and 26277 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:05,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:05,813 INFO L93 Difference]: Finished difference Result 11763 states and 29051 transitions. [2021-07-09 17:14:05,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:14:05,814 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:05,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:05,834 INFO L225 Difference]: With dead ends: 11763 [2021-07-09 17:14:05,834 INFO L226 Difference]: Without dead ends: 11718 [2021-07-09 17:14:05,834 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 139.0ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:05,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11718 states. [2021-07-09 17:14:05,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11718 to 10205. [2021-07-09 17:14:05,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10205 states, 10204 states have (on average 2.574284594276754) internal successors, (26268), 10204 states have internal predecessors, (26268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:06,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10205 states to 10205 states and 26268 transitions. [2021-07-09 17:14:06,014 INFO L78 Accepts]: Start accepts. Automaton has 10205 states and 26268 transitions. Word has length 53 [2021-07-09 17:14:06,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:06,014 INFO L482 AbstractCegarLoop]: Abstraction has 10205 states and 26268 transitions. [2021-07-09 17:14:06,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:06,015 INFO L276 IsEmpty]: Start isEmpty. Operand 10205 states and 26268 transitions. [2021-07-09 17:14:06,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:06,024 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:06,024 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:06,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable690,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:06,240 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:06,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:06,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1122147283, now seen corresponding path program 196 times [2021-07-09 17:14:06,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:06,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266731657] [2021-07-09 17:14:06,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:06,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:06,296 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:14:06,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:06,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266731657] [2021-07-09 17:14:06,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266731657] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:06,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309786888] [2021-07-09 17:14:06,297 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 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:06,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:06,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:06,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:06,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:06,402 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 88 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:14:06,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1309786888] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:06,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:06,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:14:06,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295098909] [2021-07-09 17:14:06,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:14:06,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:06,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:14:06,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:14:06,403 INFO L87 Difference]: Start difference. First operand 10205 states and 26268 transitions. Second operand has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:06,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:06,562 INFO L93 Difference]: Finished difference Result 12506 states and 30816 transitions. [2021-07-09 17:14:06,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:14:06,563 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:06,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:06,583 INFO L225 Difference]: With dead ends: 12506 [2021-07-09 17:14:06,584 INFO L226 Difference]: Without dead ends: 12506 [2021-07-09 17:14:06,584 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:06,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12506 states. [2021-07-09 17:14:06,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12506 to 10409. [2021-07-09 17:14:06,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10409 states, 10408 states have (on average 2.5858954650269026) internal successors, (26914), 10408 states have internal predecessors, (26914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10409 states to 10409 states and 26914 transitions. [2021-07-09 17:14:06,773 INFO L78 Accepts]: Start accepts. Automaton has 10409 states and 26914 transitions. Word has length 53 [2021-07-09 17:14:06,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:06,773 INFO L482 AbstractCegarLoop]: Abstraction has 10409 states and 26914 transitions. [2021-07-09 17:14:06,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.9) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:06,773 INFO L276 IsEmpty]: Start isEmpty. Operand 10409 states and 26914 transitions. [2021-07-09 17:14:06,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:06,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:06,783 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:06,983 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable697 [2021-07-09 17:14:06,984 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:06,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:06,984 INFO L82 PathProgramCache]: Analyzing trace with hash 884085766, now seen corresponding path program 94 times [2021-07-09 17:14:06,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:06,984 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957041833] [2021-07-09 17:14:06,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:06,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:07,070 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 8 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:07,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:07,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957041833] [2021-07-09 17:14:07,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957041833] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:07,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386282594] [2021-07-09 17:14:07,070 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 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-09 17:14:07,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:07,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:07,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:07,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:07,172 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:07,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386282594] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:07,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:07,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:14:07,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922259843] [2021-07-09 17:14:07,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:14:07,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:07,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:14:07,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:07,173 INFO L87 Difference]: Start difference. First operand 10409 states and 26914 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:07,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:07,637 INFO L93 Difference]: Finished difference Result 11786 states and 29613 transitions. [2021-07-09 17:14:07,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:14:07,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:07,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:07,659 INFO L225 Difference]: With dead ends: 11786 [2021-07-09 17:14:07,659 INFO L226 Difference]: Without dead ends: 11771 [2021-07-09 17:14:07,659 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 128.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:07,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11771 states. [2021-07-09 17:14:07,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11771 to 10612. [2021-07-09 17:14:07,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10612 states, 10611 states have (on average 2.5817547827725944) internal successors, (27395), 10611 states have internal predecessors, (27395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:07,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10612 states to 10612 states and 27395 transitions. [2021-07-09 17:14:07,856 INFO L78 Accepts]: Start accepts. Automaton has 10612 states and 27395 transitions. Word has length 53 [2021-07-09 17:14:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:07,856 INFO L482 AbstractCegarLoop]: Abstraction has 10612 states and 27395 transitions. [2021-07-09 17:14:07,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 10612 states and 27395 transitions. [2021-07-09 17:14:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:07,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:07,867 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:08,082 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-07-09 17:14:08,083 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:08,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:08,083 INFO L82 PathProgramCache]: Analyzing trace with hash -669611091, now seen corresponding path program 197 times [2021-07-09 17:14:08,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:08,083 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303843754] [2021-07-09 17:14:08,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:08,133 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-07-09 17:14:08,133 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:08,133 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303843754] [2021-07-09 17:14:08,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303843754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:08,134 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266222283] [2021-07-09 17:14:08,134 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 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:08,163 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 17:14:08,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:08,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:08,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:08,248 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 61 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:08,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266222283] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:08,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:08,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 12] total 12 [2021-07-09 17:14:08,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406095142] [2021-07-09 17:14:08,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:14:08,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:08,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:14:08,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:08,249 INFO L87 Difference]: Start difference. First operand 10612 states and 27395 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:08,442 INFO L93 Difference]: Finished difference Result 12612 states and 31047 transitions. [2021-07-09 17:14:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:14:08,443 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:08,545 INFO L225 Difference]: With dead ends: 12612 [2021-07-09 17:14:08,545 INFO L226 Difference]: Without dead ends: 12609 [2021-07-09 17:14:08,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 62.6ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12609 states. [2021-07-09 17:14:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12609 to 10610. [2021-07-09 17:14:08,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 2.5811103779809597) internal successors, (27383), 10609 states have internal predecessors, (27383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:08,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27383 transitions. [2021-07-09 17:14:08,709 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27383 transitions. Word has length 53 [2021-07-09 17:14:08,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:08,709 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27383 transitions. [2021-07-09 17:14:08,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:08,709 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27383 transitions. [2021-07-09 17:14:08,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:08,720 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:08,720 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:08,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable699,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:08,934 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:08,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:08,934 INFO L82 PathProgramCache]: Analyzing trace with hash -462548525, now seen corresponding path program 198 times [2021-07-09 17:14:08,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:08,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10934090] [2021-07-09 17:14:08,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:08,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:08,990 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:14:08,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:08,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10934090] [2021-07-09 17:14:08,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10934090] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:08,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837392171] [2021-07-09 17:14:08,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:09,020 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 17:14:09,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:09,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:09,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:09,082 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 80 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:14:09,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837392171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:09,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:09,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:14:09,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362632856] [2021-07-09 17:14:09,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:14:09,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:09,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:14:09,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:09,083 INFO L87 Difference]: Start difference. First operand 10610 states and 27383 transitions. Second operand has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:09,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:09,250 INFO L93 Difference]: Finished difference Result 12493 states and 30763 transitions. [2021-07-09 17:14:09,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:14:09,250 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:09,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:09,267 INFO L225 Difference]: With dead ends: 12493 [2021-07-09 17:14:09,267 INFO L226 Difference]: Without dead ends: 12475 [2021-07-09 17:14:09,268 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 65.1ms TimeCoverageRelationStatistics Valid=74, Invalid=108, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:09,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12475 states. [2021-07-09 17:14:09,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12475 to 10610. [2021-07-09 17:14:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10610 states, 10609 states have (on average 2.578942407389952) internal successors, (27360), 10609 states have internal predecessors, (27360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:09,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10610 states to 10610 states and 27360 transitions. [2021-07-09 17:14:09,423 INFO L78 Accepts]: Start accepts. Automaton has 10610 states and 27360 transitions. Word has length 53 [2021-07-09 17:14:09,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:09,423 INFO L482 AbstractCegarLoop]: Abstraction has 10610 states and 27360 transitions. [2021-07-09 17:14:09,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.545454545454546) internal successors, (50), 10 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:09,423 INFO L276 IsEmpty]: Start isEmpty. Operand 10610 states and 27360 transitions. [2021-07-09 17:14:09,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:09,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:09,433 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:09,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable701 [2021-07-09 17:14:09,649 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:09,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:09,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1910548538, now seen corresponding path program 199 times [2021-07-09 17:14:09,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:09,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391148637] [2021-07-09 17:14:09,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:09,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:09,721 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 113 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:09,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:09,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391148637] [2021-07-09 17:14:09,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391148637] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:09,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344453910] [2021-07-09 17:14:09,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:09,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:09,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 118 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:09,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [344453910] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:09,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:09,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:14:09,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782412088] [2021-07-09 17:14:09,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:14:09,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:09,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:14:09,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:09,826 INFO L87 Difference]: Start difference. First operand 10610 states and 27360 transitions. Second operand has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:10,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:10,409 INFO L93 Difference]: Finished difference Result 11446 states and 28816 transitions. [2021-07-09 17:14:10,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:14:10,409 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:10,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:10,426 INFO L225 Difference]: With dead ends: 11446 [2021-07-09 17:14:10,426 INFO L226 Difference]: Without dead ends: 11336 [2021-07-09 17:14:10,427 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 119.6ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:10,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11336 states. [2021-07-09 17:14:10,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11336 to 10627. [2021-07-09 17:14:10,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10627 states, 10626 states have (on average 2.569734613212874) internal successors, (27306), 10626 states have internal predecessors, (27306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:10,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10627 states to 10627 states and 27306 transitions. [2021-07-09 17:14:10,610 INFO L78 Accepts]: Start accepts. Automaton has 10627 states and 27306 transitions. Word has length 53 [2021-07-09 17:14:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:10,610 INFO L482 AbstractCegarLoop]: Abstraction has 10627 states and 27306 transitions. [2021-07-09 17:14:10,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.181818181818182) internal successors, (57), 10 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 10627 states and 27306 transitions. [2021-07-09 17:14:10,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:10,621 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:10,621 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:10,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable704,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:10,836 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:10,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:10,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1770882578, now seen corresponding path program 200 times [2021-07-09 17:14:10,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:10,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888134214] [2021-07-09 17:14:10,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:10,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:10,914 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 114 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:14:10,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:10,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888134214] [2021-07-09 17:14:10,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888134214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:10,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [523944162] [2021-07-09 17:14:10,914 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 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:10,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:10,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:10,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:10,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:11,012 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:14:11,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [523944162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:11,013 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:11,013 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:14:11,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115423480] [2021-07-09 17:14:11,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:14:11,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:11,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:14:11,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:11,013 INFO L87 Difference]: Start difference. First operand 10627 states and 27306 transitions. Second operand has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:11,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:11,453 INFO L93 Difference]: Finished difference Result 11964 states and 29958 transitions. [2021-07-09 17:14:11,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:14:11,453 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:11,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:11,471 INFO L225 Difference]: With dead ends: 11964 [2021-07-09 17:14:11,471 INFO L226 Difference]: Without dead ends: 11952 [2021-07-09 17:14:11,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 119.1ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:11,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11952 states. [2021-07-09 17:14:11,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11952 to 10745. [2021-07-09 17:14:11,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10745 states, 10744 states have (on average 2.5690618019359643) internal successors, (27602), 10744 states have internal predecessors, (27602), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:11,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10745 states to 10745 states and 27602 transitions. [2021-07-09 17:14:11,626 INFO L78 Accepts]: Start accepts. Automaton has 10745 states and 27602 transitions. Word has length 53 [2021-07-09 17:14:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:11,626 INFO L482 AbstractCegarLoop]: Abstraction has 10745 states and 27602 transitions. [2021-07-09 17:14:11,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.7272727272727275) internal successors, (52), 10 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 10745 states and 27602 transitions. [2021-07-09 17:14:11,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:11,635 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:11,635 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:11,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable705 [2021-07-09 17:14:11,851 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:11,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:11,851 INFO L82 PathProgramCache]: Analyzing trace with hash -382167384, now seen corresponding path program 201 times [2021-07-09 17:14:11,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:11,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564192920] [2021-07-09 17:14:11,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:11,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:11,978 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:11,978 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:11,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564192920] [2021-07-09 17:14:11,978 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564192920] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:11,978 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556023231] [2021-07-09 17:14:11,979 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 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:12,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 17:14:12,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:12,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:12,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:12,144 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:12,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556023231] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:12,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:12,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:14:12,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288825956] [2021-07-09 17:14:12,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:12,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:12,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:12,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:12,145 INFO L87 Difference]: Start difference. First operand 10745 states and 27602 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:12,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:12,855 INFO L93 Difference]: Finished difference Result 13743 states and 33934 transitions. [2021-07-09 17:14:12,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:14:12,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:12,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:12,875 INFO L225 Difference]: With dead ends: 13743 [2021-07-09 17:14:12,875 INFO L226 Difference]: Without dead ends: 13689 [2021-07-09 17:14:12,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 250.9ms TimeCoverageRelationStatistics Valid=111, Invalid=701, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:14:12,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13689 states. [2021-07-09 17:14:13,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13689 to 11094. [2021-07-09 17:14:13,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.5733345352925268) internal successors, (28546), 11093 states have internal predecessors, (28546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28546 transitions. [2021-07-09 17:14:13,045 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28546 transitions. Word has length 53 [2021-07-09 17:14:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:13,045 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28546 transitions. [2021-07-09 17:14:13,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28546 transitions. [2021-07-09 17:14:13,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:13,055 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:13,055 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:13,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable706,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:13,255 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:13,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:13,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1150391725, now seen corresponding path program 202 times [2021-07-09 17:14:13,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:13,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223269689] [2021-07-09 17:14:13,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:13,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:13,328 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:13,328 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:13,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223269689] [2021-07-09 17:14:13,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223269689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:13,328 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894217135] [2021-07-09 17:14:13,328 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 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:13,357 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:13,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:13,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:13,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 40 proven. 94 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:13,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894217135] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:13,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:13,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:14:13,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217880135] [2021-07-09 17:14:13,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:13,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:13,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:13,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:13,435 INFO L87 Difference]: Start difference. First operand 11094 states and 28546 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:13,629 INFO L93 Difference]: Finished difference Result 13092 states and 32135 transitions. [2021-07-09 17:14:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:14:13,630 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:13,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:13,649 INFO L225 Difference]: With dead ends: 13092 [2021-07-09 17:14:13,649 INFO L226 Difference]: Without dead ends: 13068 [2021-07-09 17:14:13,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:13,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13068 states. [2021-07-09 17:14:13,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13068 to 11094. [2021-07-09 17:14:13,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11094 states, 11093 states have (on average 2.571802037320833) internal successors, (28529), 11093 states have internal predecessors, (28529), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:13,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11094 states to 11094 states and 28529 transitions. [2021-07-09 17:14:13,820 INFO L78 Accepts]: Start accepts. Automaton has 11094 states and 28529 transitions. Word has length 53 [2021-07-09 17:14:13,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:13,820 INFO L482 AbstractCegarLoop]: Abstraction has 11094 states and 28529 transitions. [2021-07-09 17:14:13,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:13,820 INFO L276 IsEmpty]: Start isEmpty. Operand 11094 states and 28529 transitions. [2021-07-09 17:14:13,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:13,829 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:13,829 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:14,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:14,045 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:14,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:14,046 INFO L82 PathProgramCache]: Analyzing trace with hash -227330850, now seen corresponding path program 203 times [2021-07-09 17:14:14,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:14,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77336773] [2021-07-09 17:14:14,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:14,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:14,132 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:14,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:14,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77336773] [2021-07-09 17:14:14,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77336773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:14,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035655048] [2021-07-09 17:14:14,132 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 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:14,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 17:14:14,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:14,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:14,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:14,240 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:14,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035655048] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:14,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:14,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:14:14,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100482525] [2021-07-09 17:14:14,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:14:14,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:14,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:14:14,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:14,240 INFO L87 Difference]: Start difference. First operand 11094 states and 28529 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:15,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:15,248 INFO L93 Difference]: Finished difference Result 17716 states and 42908 transitions. [2021-07-09 17:14:15,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-07-09 17:14:15,249 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:15,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:15,275 INFO L225 Difference]: With dead ends: 17716 [2021-07-09 17:14:15,275 INFO L226 Difference]: Without dead ends: 17548 [2021-07-09 17:14:15,276 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 465.4ms TimeCoverageRelationStatistics Valid=273, Invalid=2079, Unknown=0, NotChecked=0, Total=2352 [2021-07-09 17:14:15,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17548 states. [2021-07-09 17:14:15,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17548 to 11789. [2021-07-09 17:14:15,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11789 states, 11788 states have (on average 2.574737020699016) internal successors, (30351), 11788 states have internal predecessors, (30351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:15,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30351 transitions. [2021-07-09 17:14:15,486 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30351 transitions. Word has length 53 [2021-07-09 17:14:15,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:15,486 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30351 transitions. [2021-07-09 17:14:15,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:15,487 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30351 transitions. [2021-07-09 17:14:15,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:15,496 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:15,496 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:15,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable711,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:15,712 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:15,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:15,713 INFO L82 PathProgramCache]: Analyzing trace with hash 159271827, now seen corresponding path program 204 times [2021-07-09 17:14:15,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:15,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500358265] [2021-07-09 17:14:15,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:15,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:15,789 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:15,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:15,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500358265] [2021-07-09 17:14:15,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500358265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:15,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933117258] [2021-07-09 17:14:15,789 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 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:15,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:14:15,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:15,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:15,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:15,898 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 35 proven. 99 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:15,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933117258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:15,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:15,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:14:15,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253566978] [2021-07-09 17:14:15,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:14:15,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:14:15,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:15,899 INFO L87 Difference]: Start difference. First operand 11789 states and 30351 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:16,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:16,099 INFO L93 Difference]: Finished difference Result 13934 states and 34216 transitions. [2021-07-09 17:14:16,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:14:16,099 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:16,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:16,119 INFO L225 Difference]: With dead ends: 13934 [2021-07-09 17:14:16,119 INFO L226 Difference]: Without dead ends: 13901 [2021-07-09 17:14:16,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 93.9ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:16,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13901 states. [2021-07-09 17:14:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13901 to 11789. [2021-07-09 17:14:16,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11789 states, 11788 states have (on average 2.5739735324058364) internal successors, (30342), 11788 states have internal predecessors, (30342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:16,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11789 states to 11789 states and 30342 transitions. [2021-07-09 17:14:16,308 INFO L78 Accepts]: Start accepts. Automaton has 11789 states and 30342 transitions. Word has length 53 [2021-07-09 17:14:16,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:16,308 INFO L482 AbstractCegarLoop]: Abstraction has 11789 states and 30342 transitions. [2021-07-09 17:14:16,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:16,308 INFO L276 IsEmpty]: Start isEmpty. Operand 11789 states and 30342 transitions. [2021-07-09 17:14:16,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:16,318 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:16,318 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:16,534 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable712,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:16,534 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:16,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:16,534 INFO L82 PathProgramCache]: Analyzing trace with hash -287022360, now seen corresponding path program 205 times [2021-07-09 17:14:16,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:16,534 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738489580] [2021-07-09 17:14:16,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:16,685 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:16,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:16,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738489580] [2021-07-09 17:14:16,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738489580] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:16,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517616093] [2021-07-09 17:14:16,685 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 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:16,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:16,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:16,791 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:16,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517616093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:16,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:16,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:14:16,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179448909] [2021-07-09 17:14:16,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:14:16,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:16,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:14:16,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:16,792 INFO L87 Difference]: Start difference. First operand 11789 states and 30342 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:18,412 INFO L93 Difference]: Finished difference Result 26526 states and 62830 transitions. [2021-07-09 17:14:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-07-09 17:14:18,412 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:18,459 INFO L225 Difference]: With dead ends: 26526 [2021-07-09 17:14:18,459 INFO L226 Difference]: Without dead ends: 26004 [2021-07-09 17:14:18,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2275 ImplicationChecksByTransitivity, 949.4ms TimeCoverageRelationStatistics Valid=651, Invalid=5829, Unknown=0, NotChecked=0, Total=6480 [2021-07-09 17:14:18,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26004 states. [2021-07-09 17:14:18,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26004 to 12945. [2021-07-09 17:14:18,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 12944 states have (on average 2.575324474660074) internal successors, (33335), 12944 states have internal predecessors, (33335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:18,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33335 transitions. [2021-07-09 17:14:18,909 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33335 transitions. Word has length 53 [2021-07-09 17:14:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:18,909 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33335 transitions. [2021-07-09 17:14:18,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33335 transitions. [2021-07-09 17:14:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:18,918 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:18,918 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:19,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,350 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:19,134 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:19,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:19,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1606550509, now seen corresponding path program 206 times [2021-07-09 17:14:19,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:19,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860620171] [2021-07-09 17:14:19,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:19,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:19,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:19,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860620171] [2021-07-09 17:14:19,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860620171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:19,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580297948] [2021-07-09 17:14:19,218 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 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:19,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:19,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:19,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:19,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:19,318 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 36 proven. 98 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:19,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580297948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:19,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:19,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:14:19,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510114675] [2021-07-09 17:14:19,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:14:19,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:19,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:14:19,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:19,318 INFO L87 Difference]: Start difference. First operand 12945 states and 33335 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:19,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:19,567 INFO L93 Difference]: Finished difference Result 15322 states and 37639 transitions. [2021-07-09 17:14:19,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:19,568 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:19,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:19,591 INFO L225 Difference]: With dead ends: 15322 [2021-07-09 17:14:19,592 INFO L226 Difference]: Without dead ends: 15280 [2021-07-09 17:14:19,592 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 112.2ms TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:19,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15280 states. [2021-07-09 17:14:19,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15280 to 12945. [2021-07-09 17:14:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12945 states, 12944 states have (on average 2.574629171817058) internal successors, (33326), 12944 states have internal predecessors, (33326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:19,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12945 states to 12945 states and 33326 transitions. [2021-07-09 17:14:19,810 INFO L78 Accepts]: Start accepts. Automaton has 12945 states and 33326 transitions. Word has length 53 [2021-07-09 17:14:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:19,811 INFO L482 AbstractCegarLoop]: Abstraction has 12945 states and 33326 transitions. [2021-07-09 17:14:19,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 12945 states and 33326 transitions. [2021-07-09 17:14:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:19,820 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:19,820 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:20,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable718,351 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:20,036 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:20,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:20,037 INFO L82 PathProgramCache]: Analyzing trace with hash -440336226, now seen corresponding path program 207 times [2021-07-09 17:14:20,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:20,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878548180] [2021-07-09 17:14:20,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:20,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:20,144 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:20,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:20,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878548180] [2021-07-09 17:14:20,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878548180] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:20,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077891799] [2021-07-09 17:14:20,144 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 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:20,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 17:14:20,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:20,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:20,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:20,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077891799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:20,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:20,249 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:14:20,249 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325589024] [2021-07-09 17:14:20,249 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:14:20,249 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:20,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:14:20,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:20,249 INFO L87 Difference]: Start difference. First operand 12945 states and 33326 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:22,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:22,758 INFO L93 Difference]: Finished difference Result 33896 states and 80215 transitions. [2021-07-09 17:14:22,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-07-09 17:14:22,759 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:22,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:22,819 INFO L225 Difference]: With dead ends: 33896 [2021-07-09 17:14:22,820 INFO L226 Difference]: Without dead ends: 33278 [2021-07-09 17:14:22,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6564 ImplicationChecksByTransitivity, 1719.7ms TimeCoverageRelationStatistics Valid=1461, Invalid=15051, Unknown=0, NotChecked=0, Total=16512 [2021-07-09 17:14:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33278 states. [2021-07-09 17:14:23,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33278 to 13864. [2021-07-09 17:14:23,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13864 states, 13863 states have (on average 2.5749116352881773) internal successors, (35696), 13863 states have internal predecessors, (35696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:23,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13864 states to 13864 states and 35696 transitions. [2021-07-09 17:14:23,197 INFO L78 Accepts]: Start accepts. Automaton has 13864 states and 35696 transitions. Word has length 53 [2021-07-09 17:14:23,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:23,198 INFO L482 AbstractCegarLoop]: Abstraction has 13864 states and 35696 transitions. [2021-07-09 17:14:23,198 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:23,198 INFO L276 IsEmpty]: Start isEmpty. Operand 13864 states and 35696 transitions. [2021-07-09 17:14:23,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:23,208 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:23,208 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:23,424 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable724,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:23,424 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:23,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:23,424 INFO L82 PathProgramCache]: Analyzing trace with hash 309081427, now seen corresponding path program 208 times [2021-07-09 17:14:23,424 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:23,424 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390307044] [2021-07-09 17:14:23,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:23,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:23,527 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:23,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:23,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390307044] [2021-07-09 17:14:23,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390307044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:23,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678560347] [2021-07-09 17:14:23,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:23,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:23,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:23,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:23,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:23,650 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:23,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678560347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:23,650 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:23,650 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:14:23,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944096100] [2021-07-09 17:14:23,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:14:23,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:23,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:14:23,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:23,658 INFO L87 Difference]: Start difference. First operand 13864 states and 35696 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:23,962 INFO L93 Difference]: Finished difference Result 16347 states and 40212 transitions. [2021-07-09 17:14:23,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:14:23,962 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:23,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:23,990 INFO L225 Difference]: With dead ends: 16347 [2021-07-09 17:14:23,991 INFO L226 Difference]: Without dead ends: 16296 [2021-07-09 17:14:23,991 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:24,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16296 states. [2021-07-09 17:14:24,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16296 to 13554. [2021-07-09 17:14:24,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13554 states, 13553 states have (on average 2.570353427285472) internal successors, (34836), 13553 states have internal predecessors, (34836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13554 states to 13554 states and 34836 transitions. [2021-07-09 17:14:24,217 INFO L78 Accepts]: Start accepts. Automaton has 13554 states and 34836 transitions. Word has length 53 [2021-07-09 17:14:24,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:24,227 INFO L482 AbstractCegarLoop]: Abstraction has 13554 states and 34836 transitions. [2021-07-09 17:14:24,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:24,227 INFO L276 IsEmpty]: Start isEmpty. Operand 13554 states and 34836 transitions. [2021-07-09 17:14:24,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:24,237 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:24,237 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:24,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:24,453 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:24,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:24,454 INFO L82 PathProgramCache]: Analyzing trace with hash 2031484712, now seen corresponding path program 209 times [2021-07-09 17:14:24,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:24,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493767004] [2021-07-09 17:14:24,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:24,577 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:24,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:24,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493767004] [2021-07-09 17:14:24,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493767004] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:24,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864935532] [2021-07-09 17:14:24,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:24,610 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 17:14:24,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:24,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:24,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:24,687 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 119 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:24,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864935532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:24,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:24,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:14:24,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282812580] [2021-07-09 17:14:24,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:14:24,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:24,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:14:24,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:24,688 INFO L87 Difference]: Start difference. First operand 13554 states and 34836 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:25,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:25,488 INFO L93 Difference]: Finished difference Result 18422 states and 44497 transitions. [2021-07-09 17:14:25,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:14:25,488 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:25,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:25,514 INFO L225 Difference]: With dead ends: 18422 [2021-07-09 17:14:25,514 INFO L226 Difference]: Without dead ends: 17582 [2021-07-09 17:14:25,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 351.2ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:14:25,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17582 states. [2021-07-09 17:14:25,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17582 to 10239. [2021-07-09 17:14:25,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10239 states, 10238 states have (on average 2.551279546786482) internal successors, (26120), 10238 states have internal predecessors, (26120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:25,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10239 states to 10239 states and 26120 transitions. [2021-07-09 17:14:25,697 INFO L78 Accepts]: Start accepts. Automaton has 10239 states and 26120 transitions. Word has length 53 [2021-07-09 17:14:25,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:25,697 INFO L482 AbstractCegarLoop]: Abstraction has 10239 states and 26120 transitions. [2021-07-09 17:14:25,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:25,697 INFO L276 IsEmpty]: Start isEmpty. Operand 10239 states and 26120 transitions. [2021-07-09 17:14:25,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:25,708 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:25,708 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:25,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:25,924 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:25,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:25,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1793423195, now seen corresponding path program 95 times [2021-07-09 17:14:25,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:25,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160715508] [2021-07-09 17:14:25,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:26,030 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:26,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:26,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160715508] [2021-07-09 17:14:26,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160715508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:26,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505356677] [2021-07-09 17:14:26,030 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:26,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 17:14:26,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:26,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:26,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:26,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505356677] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:26,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:26,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 15] total 18 [2021-07-09 17:14:26,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27052866] [2021-07-09 17:14:26,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:14:26,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:26,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:14:26,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=215, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:26,192 INFO L87 Difference]: Start difference. First operand 10239 states and 26120 transitions. Second operand has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:26,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:26,498 INFO L93 Difference]: Finished difference Result 12499 states and 30979 transitions. [2021-07-09 17:14:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:14:26,498 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:26,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:26,518 INFO L225 Difference]: With dead ends: 12499 [2021-07-09 17:14:26,518 INFO L226 Difference]: Without dead ends: 12485 [2021-07-09 17:14:26,519 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 126.2ms TimeCoverageRelationStatistics Valid=148, Invalid=272, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:26,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12485 states. [2021-07-09 17:14:26,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12485 to 10638. [2021-07-09 17:14:26,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10638 states, 10637 states have (on average 2.5578640594152486) internal successors, (27208), 10637 states have internal predecessors, (27208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10638 states to 10638 states and 27208 transitions. [2021-07-09 17:14:26,705 INFO L78 Accepts]: Start accepts. Automaton has 10638 states and 27208 transitions. Word has length 53 [2021-07-09 17:14:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:26,705 INFO L482 AbstractCegarLoop]: Abstraction has 10638 states and 27208 transitions. [2021-07-09 17:14:26,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.315789473684211) internal successors, (82), 18 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 10638 states and 27208 transitions. [2021-07-09 17:14:26,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:26,715 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:26,715 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:26,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-07-09 17:14:26,916 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:26,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:26,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1171542785, now seen corresponding path program 96 times [2021-07-09 17:14:26,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:26,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765557081] [2021-07-09 17:14:26,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:26,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:26,990 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:26,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:26,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765557081] [2021-07-09 17:14:26,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765557081] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:26,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026151000] [2021-07-09 17:14:26,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:27,023 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-09 17:14:27,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:27,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:27,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:27,102 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:27,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026151000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:27,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:27,102 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:14:27,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427974174] [2021-07-09 17:14:27,103 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:27,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:27,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:27,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=76, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:27,103 INFO L87 Difference]: Start difference. First operand 10638 states and 27208 transitions. Second operand has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:27,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:27,363 INFO L93 Difference]: Finished difference Result 14368 states and 35164 transitions. [2021-07-09 17:14:27,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:14:27,363 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:27,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:27,388 INFO L225 Difference]: With dead ends: 14368 [2021-07-09 17:14:27,388 INFO L226 Difference]: Without dead ends: 14368 [2021-07-09 17:14:27,388 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 106.9ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:14:27,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14368 states. [2021-07-09 17:14:27,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14368 to 10646. [2021-07-09 17:14:27,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10646 states, 10645 states have (on average 2.558290277125411) internal successors, (27233), 10645 states have internal predecessors, (27233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:27,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10646 states to 10646 states and 27233 transitions. [2021-07-09 17:14:27,565 INFO L78 Accepts]: Start accepts. Automaton has 10646 states and 27233 transitions. Word has length 53 [2021-07-09 17:14:27,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:27,565 INFO L482 AbstractCegarLoop]: Abstraction has 10646 states and 27233 transitions. [2021-07-09 17:14:27,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.75) internal successors, (57), 11 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:27,565 INFO L276 IsEmpty]: Start isEmpty. Operand 10646 states and 27233 transitions. [2021-07-09 17:14:27,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:27,575 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:27,575 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:27,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable735,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:27,791 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:27,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:27,791 INFO L82 PathProgramCache]: Analyzing trace with hash -466029671, now seen corresponding path program 97 times [2021-07-09 17:14:27,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:27,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987076293] [2021-07-09 17:14:27,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:27,861 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 100 proven. 34 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:27,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:27,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987076293] [2021-07-09 17:14:27,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987076293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:27,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799578113] [2021-07-09 17:14:27,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:27,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:27,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:27,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:27,973 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 101 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:27,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799578113] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:27,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:27,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:14:27,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627239847] [2021-07-09 17:14:27,973 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:14:27,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:27,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:14:27,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:27,973 INFO L87 Difference]: Start difference. First operand 10646 states and 27233 transitions. Second operand has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:28,315 INFO L93 Difference]: Finished difference Result 15753 states and 38328 transitions. [2021-07-09 17:14:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:28,315 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:28,338 INFO L225 Difference]: With dead ends: 15753 [2021-07-09 17:14:28,338 INFO L226 Difference]: Without dead ends: 15753 [2021-07-09 17:14:28,339 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 152.9ms TimeCoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:28,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15753 states. [2021-07-09 17:14:28,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15753 to 10665. [2021-07-09 17:14:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10665 states, 10664 states have (on average 2.559358589647412) internal successors, (27293), 10664 states have internal predecessors, (27293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:28,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10665 states to 10665 states and 27293 transitions. [2021-07-09 17:14:28,537 INFO L78 Accepts]: Start accepts. Automaton has 10665 states and 27293 transitions. Word has length 53 [2021-07-09 17:14:28,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:28,537 INFO L482 AbstractCegarLoop]: Abstraction has 10665 states and 27293 transitions. [2021-07-09 17:14:28,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.384615384615385) internal successors, (57), 12 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:28,537 INFO L276 IsEmpty]: Start isEmpty. Operand 10665 states and 27293 transitions. [2021-07-09 17:14:28,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:28,546 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:28,546 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:28,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-07-09 17:14:28,762 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:28,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:28,762 INFO L82 PathProgramCache]: Analyzing trace with hash 2138942461, now seen corresponding path program 98 times [2021-07-09 17:14:28,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:28,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128146746] [2021-07-09 17:14:28,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:28,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:28,855 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 96 proven. 38 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:28,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:28,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128146746] [2021-07-09 17:14:28,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128146746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:28,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863710339] [2021-07-09 17:14:28,855 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 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:28,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:28,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:28,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:28,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 97 proven. 38 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:28,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863710339] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:28,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:28,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:14:28,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524508733] [2021-07-09 17:14:28,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:14:28,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:28,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:14:28,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:28,957 INFO L87 Difference]: Start difference. First operand 10665 states and 27293 transitions. Second operand has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:29,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:29,495 INFO L93 Difference]: Finished difference Result 16162 states and 39295 transitions. [2021-07-09 17:14:29,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:14:29,496 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:29,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:29,524 INFO L225 Difference]: With dead ends: 16162 [2021-07-09 17:14:29,525 INFO L226 Difference]: Without dead ends: 16162 [2021-07-09 17:14:29,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 213.6ms TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:14:29,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16162 states. [2021-07-09 17:14:29,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16162 to 10690. [2021-07-09 17:14:29,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10690 states, 10689 states have (on average 2.560669847506783) internal successors, (27371), 10689 states have internal predecessors, (27371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:29,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10690 states to 10690 states and 27371 transitions. [2021-07-09 17:14:29,748 INFO L78 Accepts]: Start accepts. Automaton has 10690 states and 27371 transitions. Word has length 53 [2021-07-09 17:14:29,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:29,748 INFO L482 AbstractCegarLoop]: Abstraction has 10690 states and 27371 transitions. [2021-07-09 17:14:29,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.071428571428571) internal successors, (57), 13 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 10690 states and 27371 transitions. [2021-07-09 17:14:29,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:29,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:29,758 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:29,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:29,974 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:29,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:29,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1099655449, now seen corresponding path program 99 times [2021-07-09 17:14:29,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:29,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650413168] [2021-07-09 17:14:29,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:29,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:30,061 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 92 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:30,061 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:30,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650413168] [2021-07-09 17:14:30,061 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650413168] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:30,061 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679233930] [2021-07-09 17:14:30,061 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 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:30,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 17:14:30,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:30,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:14:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:30,228 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 106 proven. 29 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:30,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679233930] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:30,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:30,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 18 [2021-07-09 17:14:30,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046828489] [2021-07-09 17:14:30,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:14:30,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:30,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:14:30,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:30,229 INFO L87 Difference]: Start difference. First operand 10690 states and 27371 transitions. Second operand has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:30,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:30,623 INFO L93 Difference]: Finished difference Result 12484 states and 30934 transitions. [2021-07-09 17:14:30,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:30,623 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:30,649 INFO L225 Difference]: With dead ends: 12484 [2021-07-09 17:14:30,650 INFO L226 Difference]: Without dead ends: 12484 [2021-07-09 17:14:30,650 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 223.5ms TimeCoverageRelationStatistics Valid=296, Invalid=516, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:14:30,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12484 states. [2021-07-09 17:14:30,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12484 to 10077. [2021-07-09 17:14:30,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10077 states, 10076 states have (on average 2.5562723302897976) internal successors, (25757), 10076 states have internal predecessors, (25757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10077 states to 10077 states and 25757 transitions. [2021-07-09 17:14:30,839 INFO L78 Accepts]: Start accepts. Automaton has 10077 states and 25757 transitions. Word has length 53 [2021-07-09 17:14:30,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:30,839 INFO L482 AbstractCegarLoop]: Abstraction has 10077 states and 25757 transitions. [2021-07-09 17:14:30,839 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.473684210526316) internal successors, (66), 18 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:30,839 INFO L276 IsEmpty]: Start isEmpty. Operand 10077 states and 25757 transitions. [2021-07-09 17:14:30,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:30,848 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:30,849 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:31,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable738 [2021-07-09 17:14:31,065 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:31,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:31,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2113323565, now seen corresponding path program 210 times [2021-07-09 17:14:31,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:31,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223841094] [2021-07-09 17:14:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:31,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:31,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:31,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223841094] [2021-07-09 17:14:31,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223841094] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:31,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190737937] [2021-07-09 17:14:31,166 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 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:31,194 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-07-09 17:14:31,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:31,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:31,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:31,260 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 57 proven. 78 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:31,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190737937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:31,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:31,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-09 17:14:31,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849221993] [2021-07-09 17:14:31,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:14:31,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:31,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:14:31,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:31,261 INFO L87 Difference]: Start difference. First operand 10077 states and 25757 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:31,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:31,515 INFO L93 Difference]: Finished difference Result 11675 states and 28615 transitions. [2021-07-09 17:14:31,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:14:31,516 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:31,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:31,536 INFO L225 Difference]: With dead ends: 11675 [2021-07-09 17:14:31,536 INFO L226 Difference]: Without dead ends: 11621 [2021-07-09 17:14:31,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:14:31,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11621 states. [2021-07-09 17:14:31,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11621 to 10086. [2021-07-09 17:14:31,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10086 states, 10085 states have (on average 2.5548834903321764) internal successors, (25766), 10085 states have internal predecessors, (25766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:31,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10086 states to 10086 states and 25766 transitions. [2021-07-09 17:14:31,718 INFO L78 Accepts]: Start accepts. Automaton has 10086 states and 25766 transitions. Word has length 53 [2021-07-09 17:14:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:31,718 INFO L482 AbstractCegarLoop]: Abstraction has 10086 states and 25766 transitions. [2021-07-09 17:14:31,718 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 10086 states and 25766 transitions. [2021-07-09 17:14:31,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:31,728 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:31,728 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:31,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable741,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:31,941 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1980297346, now seen corresponding path program 100 times [2021-07-09 17:14:31,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:31,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681901126] [2021-07-09 17:14:31,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:31,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:32,053 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:32,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:32,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681901126] [2021-07-09 17:14:32,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681901126] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:32,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131580753] [2021-07-09 17:14:32,053 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 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:32,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:32,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:32,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:32,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:32,152 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:32,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131580753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:32,152 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:32,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:14:32,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353658176] [2021-07-09 17:14:32,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:14:32,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:32,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:14:32,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:32,153 INFO L87 Difference]: Start difference. First operand 10086 states and 25766 transitions. Second operand has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:32,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:32,760 INFO L93 Difference]: Finished difference Result 14226 states and 34514 transitions. [2021-07-09 17:14:32,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:14:32,760 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:32,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:32,780 INFO L225 Difference]: With dead ends: 14226 [2021-07-09 17:14:32,781 INFO L226 Difference]: Without dead ends: 13952 [2021-07-09 17:14:32,781 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 313.7ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:14:32,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13952 states. [2021-07-09 17:14:32,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13952 to 9958. [2021-07-09 17:14:32,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9958 states, 9957 states have (on average 2.552475645274681) internal successors, (25415), 9957 states have internal predecessors, (25415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9958 states to 9958 states and 25415 transitions. [2021-07-09 17:14:32,961 INFO L78 Accepts]: Start accepts. Automaton has 9958 states and 25415 transitions. Word has length 53 [2021-07-09 17:14:32,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:32,961 INFO L482 AbstractCegarLoop]: Abstraction has 9958 states and 25415 transitions. [2021-07-09 17:14:32,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.3125) internal successors, (53), 15 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:32,961 INFO L276 IsEmpty]: Start isEmpty. Operand 9958 states and 25415 transitions. [2021-07-09 17:14:32,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:32,970 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:32,970 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:33,184 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable749 [2021-07-09 17:14:33,189 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:33,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:33,189 INFO L82 PathProgramCache]: Analyzing trace with hash -217067145, now seen corresponding path program 211 times [2021-07-09 17:14:33,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:33,189 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176236370] [2021-07-09 17:14:33,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:33,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:33,288 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:33,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:33,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176236370] [2021-07-09 17:14:33,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176236370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:33,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8622289] [2021-07-09 17:14:33,289 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 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:33,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:33,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:33,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 66 proven. 68 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:33,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8622289] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:33,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:33,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:14:33,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261146548] [2021-07-09 17:14:33,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:14:33,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:33,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:14:33,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:33,401 INFO L87 Difference]: Start difference. First operand 9958 states and 25415 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:33,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:33,764 INFO L93 Difference]: Finished difference Result 12529 states and 31068 transitions. [2021-07-09 17:14:33,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:14:33,764 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:33,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:33,782 INFO L225 Difference]: With dead ends: 12529 [2021-07-09 17:14:33,782 INFO L226 Difference]: Without dead ends: 12529 [2021-07-09 17:14:33,782 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:33,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12529 states. [2021-07-09 17:14:33,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12529 to 10698. [2021-07-09 17:14:33,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10698 states, 10697 states have (on average 2.5853977750771246) internal successors, (27656), 10697 states have internal predecessors, (27656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:33,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10698 states to 10698 states and 27656 transitions. [2021-07-09 17:14:33,948 INFO L78 Accepts]: Start accepts. Automaton has 10698 states and 27656 transitions. Word has length 53 [2021-07-09 17:14:33,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:33,948 INFO L482 AbstractCegarLoop]: Abstraction has 10698 states and 27656 transitions. [2021-07-09 17:14:33,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:33,948 INFO L276 IsEmpty]: Start isEmpty. Operand 10698 states and 27656 transitions. [2021-07-09 17:14:33,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:33,957 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:33,957 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:34,172 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable750,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:34,173 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:34,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:34,173 INFO L82 PathProgramCache]: Analyzing trace with hash 2097202474, now seen corresponding path program 101 times [2021-07-09 17:14:34,173 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:34,173 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451078765] [2021-07-09 17:14:34,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:34,282 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:34,282 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:34,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451078765] [2021-07-09 17:14:34,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451078765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:34,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700377223] [2021-07-09 17:14:34,283 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 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:34,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:14:34,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:34,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:34,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:34,392 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:34,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1700377223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:34,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:34,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:14:34,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728957013] [2021-07-09 17:14:34,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:14:34,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:34,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:14:34,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:34,393 INFO L87 Difference]: Start difference. First operand 10698 states and 27656 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:35,017 INFO L93 Difference]: Finished difference Result 14809 states and 36436 transitions. [2021-07-09 17:14:35,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:14:35,018 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:35,040 INFO L225 Difference]: With dead ends: 14809 [2021-07-09 17:14:35,040 INFO L226 Difference]: Without dead ends: 14757 [2021-07-09 17:14:35,040 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 291.7ms TimeCoverageRelationStatistics Valid=138, Invalid=732, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:14:35,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14757 states. [2021-07-09 17:14:35,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14757 to 10607. [2021-07-09 17:14:35,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 2.587309070337545) internal successors, (27441), 10606 states have internal predecessors, (27441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:35,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27441 transitions. [2021-07-09 17:14:35,212 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27441 transitions. Word has length 53 [2021-07-09 17:14:35,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:35,212 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27441 transitions. [2021-07-09 17:14:35,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:35,212 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27441 transitions. [2021-07-09 17:14:35,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:35,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:35,220 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:35,436 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 363 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-07-09 17:14:35,436 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:35,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:35,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1617639658, now seen corresponding path program 212 times [2021-07-09 17:14:35,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:35,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272451991] [2021-07-09 17:14:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:35,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:35,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272451991] [2021-07-09 17:14:35,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272451991] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:35,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595149979] [2021-07-09 17:14:35,563 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 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:35,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:35,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:35,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:35,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:35,790 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:35,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595149979] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:35,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:35,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-07-09 17:14:35,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533468884] [2021-07-09 17:14:35,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:14:35,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:35,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:14:35,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:35,791 INFO L87 Difference]: Start difference. First operand 10607 states and 27441 transitions. Second operand has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:36,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:36,428 INFO L93 Difference]: Finished difference Result 10731 states and 27633 transitions. [2021-07-09 17:14:36,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:14:36,429 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:36,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:36,445 INFO L225 Difference]: With dead ends: 10731 [2021-07-09 17:14:36,445 INFO L226 Difference]: Without dead ends: 10675 [2021-07-09 17:14:36,445 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 209.9ms TimeCoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:14:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-07-09 17:14:36,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10607. [2021-07-09 17:14:36,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10607 states, 10606 states have (on average 2.5841976239864226) internal successors, (27408), 10606 states have internal predecessors, (27408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:36,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10607 states to 10607 states and 27408 transitions. [2021-07-09 17:14:36,597 INFO L78 Accepts]: Start accepts. Automaton has 10607 states and 27408 transitions. Word has length 53 [2021-07-09 17:14:36,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:36,597 INFO L482 AbstractCegarLoop]: Abstraction has 10607 states and 27408 transitions. [2021-07-09 17:14:36,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.6315789473684212) internal successors, (69), 18 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:36,597 INFO L276 IsEmpty]: Start isEmpty. Operand 10607 states and 27408 transitions. [2021-07-09 17:14:36,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:36,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:36,605 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:36,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable752 [2021-07-09 17:14:36,822 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:36,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:36,822 INFO L82 PathProgramCache]: Analyzing trace with hash -290292687, now seen corresponding path program 102 times [2021-07-09 17:14:36,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:36,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144880267] [2021-07-09 17:14:36,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:36,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:36,914 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 42 proven. 91 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:36,914 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:36,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144880267] [2021-07-09 17:14:36,914 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144880267] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:36,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651185123] [2021-07-09 17:14:36,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:36,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:14:36,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:36,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:36,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:37,051 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:37,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1651185123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:37,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:37,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-07-09 17:14:37,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085822535] [2021-07-09 17:14:37,051 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:14:37,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:37,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:14:37,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:37,051 INFO L87 Difference]: Start difference. First operand 10607 states and 27408 transitions. Second operand has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:37,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:37,356 INFO L93 Difference]: Finished difference Result 12680 states and 31642 transitions. [2021-07-09 17:14:37,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:14:37,356 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:37,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:37,376 INFO L225 Difference]: With dead ends: 12680 [2021-07-09 17:14:37,376 INFO L226 Difference]: Without dead ends: 12630 [2021-07-09 17:14:37,376 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:14:37,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12630 states. [2021-07-09 17:14:37,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12630 to 10144. [2021-07-09 17:14:37,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10144 states, 10143 states have (on average 2.5837523415163166) internal successors, (26207), 10143 states have internal predecessors, (26207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:37,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10144 states to 10144 states and 26207 transitions. [2021-07-09 17:14:37,551 INFO L78 Accepts]: Start accepts. Automaton has 10144 states and 26207 transitions. Word has length 53 [2021-07-09 17:14:37,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:37,551 INFO L482 AbstractCegarLoop]: Abstraction has 10144 states and 26207 transitions. [2021-07-09 17:14:37,551 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.9411764705882355) internal successors, (67), 16 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:37,551 INFO L276 IsEmpty]: Start isEmpty. Operand 10144 states and 26207 transitions. [2021-07-09 17:14:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:37,560 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:37,560 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:37,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,365 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:37,776 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:37,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:37,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1595716629, now seen corresponding path program 213 times [2021-07-09 17:14:37,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:37,776 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149602951] [2021-07-09 17:14:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:37,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:37,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149602951] [2021-07-09 17:14:37,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149602951] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:37,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501403060] [2021-07-09 17:14:37,862 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 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:37,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:14:37,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:37,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:37,971 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:37,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501403060] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:37,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:37,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:14:37,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038883847] [2021-07-09 17:14:37,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:14:37,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:37,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:14:37,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:37,972 INFO L87 Difference]: Start difference. First operand 10144 states and 26207 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:38,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:38,259 INFO L93 Difference]: Finished difference Result 12591 states and 31328 transitions. [2021-07-09 17:14:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:38,278 INFO L225 Difference]: With dead ends: 12591 [2021-07-09 17:14:38,278 INFO L226 Difference]: Without dead ends: 12591 [2021-07-09 17:14:38,279 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 136.3ms TimeCoverageRelationStatistics Valid=157, Invalid=263, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:14:38,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12591 states. [2021-07-09 17:14:38,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12591 to 10616. [2021-07-09 17:14:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10616 states, 10615 states have (on average 2.6016015073009893) internal successors, (27616), 10615 states have internal predecessors, (27616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:38,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10616 states to 10616 states and 27616 transitions. [2021-07-09 17:14:38,441 INFO L78 Accepts]: Start accepts. Automaton has 10616 states and 27616 transitions. Word has length 53 [2021-07-09 17:14:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:38,441 INFO L482 AbstractCegarLoop]: Abstraction has 10616 states and 27616 transitions. [2021-07-09 17:14:38,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 10616 states and 27616 transitions. [2021-07-09 17:14:38,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:38,449 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:38,450 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:38,665 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable759 [2021-07-09 17:14:38,665 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:38,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:38,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2006879870, now seen corresponding path program 103 times [2021-07-09 17:14:38,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:38,666 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59443773] [2021-07-09 17:14:38,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:38,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:38,770 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:38,770 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59443773] [2021-07-09 17:14:38,770 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59443773] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:38,770 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291424786] [2021-07-09 17:14:38,770 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 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:38,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:38,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:38,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:38,877 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:38,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291424786] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:38,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:38,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:14:38,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029003211] [2021-07-09 17:14:38,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:14:38,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:38,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:14:38,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:38,878 INFO L87 Difference]: Start difference. First operand 10616 states and 27616 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:39,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:39,442 INFO L93 Difference]: Finished difference Result 13894 states and 34616 transitions. [2021-07-09 17:14:39,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:14:39,442 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:39,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:39,464 INFO L225 Difference]: With dead ends: 13894 [2021-07-09 17:14:39,464 INFO L226 Difference]: Without dead ends: 13880 [2021-07-09 17:14:39,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=107, Invalid=595, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:14:39,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13880 states. [2021-07-09 17:14:39,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13880 to 10564. [2021-07-09 17:14:39,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10564 states, 10563 states have (on average 2.6058884786518983) internal successors, (27526), 10563 states have internal predecessors, (27526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:39,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27526 transitions. [2021-07-09 17:14:39,702 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27526 transitions. Word has length 53 [2021-07-09 17:14:39,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:39,702 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27526 transitions. [2021-07-09 17:14:39,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:39,703 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27526 transitions. [2021-07-09 17:14:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:39,713 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:39,713 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:39,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable760,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:39,929 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:39,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:39,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2126035330, now seen corresponding path program 214 times [2021-07-09 17:14:39,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:39,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625176477] [2021-07-09 17:14:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:39,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:40,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:40,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625176477] [2021-07-09 17:14:40,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625176477] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:40,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884674026] [2021-07-09 17:14:40,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:40,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:40,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:40,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:40,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:40,222 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:40,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884674026] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:40,222 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:40,223 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 16 [2021-07-09 17:14:40,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550527072] [2021-07-09 17:14:40,223 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:14:40,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:40,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:14:40,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:40,223 INFO L87 Difference]: Start difference. First operand 10564 states and 27526 transitions. Second operand has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:40,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:40,767 INFO L93 Difference]: Finished difference Result 10719 states and 27762 transitions. [2021-07-09 17:14:40,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:14:40,768 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:40,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:40,784 INFO L225 Difference]: With dead ends: 10719 [2021-07-09 17:14:40,784 INFO L226 Difference]: Without dead ends: 10675 [2021-07-09 17:14:40,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 177.4ms TimeCoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10675 states. [2021-07-09 17:14:40,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10675 to 10564. [2021-07-09 17:14:40,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10564 states, 10563 states have (on average 2.6041844173056896) internal successors, (27508), 10563 states have internal predecessors, (27508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:40,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10564 states to 10564 states and 27508 transitions. [2021-07-09 17:14:40,935 INFO L78 Accepts]: Start accepts. Automaton has 10564 states and 27508 transitions. Word has length 53 [2021-07-09 17:14:40,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:40,935 INFO L482 AbstractCegarLoop]: Abstraction has 10564 states and 27508 transitions. [2021-07-09 17:14:40,935 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.8823529411764706) internal successors, (66), 16 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:40,935 INFO L276 IsEmpty]: Start isEmpty. Operand 10564 states and 27508 transitions. [2021-07-09 17:14:40,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:40,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:40,944 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:41,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-07-09 17:14:41,161 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:41,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:41,161 INFO L82 PathProgramCache]: Analyzing trace with hash 145337653, now seen corresponding path program 104 times [2021-07-09 17:14:41,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:41,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067535759] [2021-07-09 17:14:41,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:41,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 50 proven. 84 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:41,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:41,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067535759] [2021-07-09 17:14:41,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067535759] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:41,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741867313] [2021-07-09 17:14:41,244 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 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:41,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:41,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:41,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:41,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:41,353 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:41,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741867313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:41,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:41,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-09 17:14:41,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469659018] [2021-07-09 17:14:41,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:14:41,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:41,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:14:41,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:41,354 INFO L87 Difference]: Start difference. First operand 10564 states and 27508 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:41,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:41,596 INFO L93 Difference]: Finished difference Result 12086 states and 30576 transitions. [2021-07-09 17:14:41,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:41,596 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:41,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:41,613 INFO L225 Difference]: With dead ends: 12086 [2021-07-09 17:14:41,613 INFO L226 Difference]: Without dead ends: 12002 [2021-07-09 17:14:41,614 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 112.5ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:41,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-07-09 17:14:41,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 9748. [2021-07-09 17:14:41,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9748 states, 9747 states have (on average 2.6030573509797885) internal successors, (25372), 9747 states have internal predecessors, (25372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9748 states to 9748 states and 25372 transitions. [2021-07-09 17:14:41,758 INFO L78 Accepts]: Start accepts. Automaton has 9748 states and 25372 transitions. Word has length 53 [2021-07-09 17:14:41,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:41,758 INFO L482 AbstractCegarLoop]: Abstraction has 9748 states and 25372 transitions. [2021-07-09 17:14:41,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 9748 states and 25372 transitions. [2021-07-09 17:14:41,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:41,765 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:41,765 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:41,981 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable762,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:41,981 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:41,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:41,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1808139831, now seen corresponding path program 215 times [2021-07-09 17:14:41,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:41,982 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097064682] [2021-07-09 17:14:41,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:41,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:42,057 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 62 proven. 72 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:42,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:42,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097064682] [2021-07-09 17:14:42,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097064682] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:42,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465282694] [2021-07-09 17:14:42,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:42,088 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:14:42,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:42,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:42,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:42,179 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 64 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:42,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465282694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:42,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:42,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 14] total 14 [2021-07-09 17:14:42,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116583887] [2021-07-09 17:14:42,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:14:42,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:42,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:14:42,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:42,180 INFO L87 Difference]: Start difference. First operand 9748 states and 25372 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:42,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:42,471 INFO L93 Difference]: Finished difference Result 12328 states and 30680 transitions. [2021-07-09 17:14:42,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:14:42,472 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:42,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:42,489 INFO L225 Difference]: With dead ends: 12328 [2021-07-09 17:14:42,490 INFO L226 Difference]: Without dead ends: 12328 [2021-07-09 17:14:42,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 118.9ms TimeCoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:14:42,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12328 states. [2021-07-09 17:14:42,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12328 to 10133. [2021-07-09 17:14:42,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10133 states, 10132 states have (on average 2.618041847611528) internal successors, (26526), 10132 states have internal predecessors, (26526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:42,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10133 states to 10133 states and 26526 transitions. [2021-07-09 17:14:42,654 INFO L78 Accepts]: Start accepts. Automaton has 10133 states and 26526 transitions. Word has length 53 [2021-07-09 17:14:42,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:42,654 INFO L482 AbstractCegarLoop]: Abstraction has 10133 states and 26526 transitions. [2021-07-09 17:14:42,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:42,654 INFO L276 IsEmpty]: Start isEmpty. Operand 10133 states and 26526 transitions. [2021-07-09 17:14:42,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:42,662 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:42,662 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:42,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable768,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:42,875 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:42,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:42,875 INFO L82 PathProgramCache]: Analyzing trace with hash -933239766, now seen corresponding path program 105 times [2021-07-09 17:14:42,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:42,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110092696] [2021-07-09 17:14:42,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:42,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:42,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110092696] [2021-07-09 17:14:42,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110092696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:42,962 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586940435] [2021-07-09 17:14:42,962 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:42,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:14:42,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:42,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:42,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:43,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586940435] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:43,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:43,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:14:43,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905503393] [2021-07-09 17:14:43,071 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:14:43,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:43,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:14:43,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:43,071 INFO L87 Difference]: Start difference. First operand 10133 states and 26526 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:43,615 INFO L93 Difference]: Finished difference Result 12314 states and 31139 transitions. [2021-07-09 17:14:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:14:43,616 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:43,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:43,636 INFO L225 Difference]: With dead ends: 12314 [2021-07-09 17:14:43,637 INFO L226 Difference]: Without dead ends: 12300 [2021-07-09 17:14:43,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 197.9ms TimeCoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:14:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12300 states. [2021-07-09 17:14:43,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12300 to 10160. [2021-07-09 17:14:43,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 10159 states have (on average 2.6188601240279556) internal successors, (26605), 10159 states have internal predecessors, (26605), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:43,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26605 transitions. [2021-07-09 17:14:43,797 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26605 transitions. Word has length 53 [2021-07-09 17:14:43,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:43,797 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26605 transitions. [2021-07-09 17:14:43,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:43,797 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26605 transitions. [2021-07-09 17:14:43,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:43,805 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:43,805 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:44,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable769 [2021-07-09 17:14:44,021 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:44,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:44,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1110130710, now seen corresponding path program 216 times [2021-07-09 17:14:44,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:44,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228600834] [2021-07-09 17:14:44,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:44,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:44,117 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228600834] [2021-07-09 17:14:44,117 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228600834] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:44,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879854456] [2021-07-09 17:14:44,118 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 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:44,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:14:44,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:44,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:44,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:44,304 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:44,305 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879854456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:44,305 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:44,305 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 14 [2021-07-09 17:14:44,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291179546] [2021-07-09 17:14:44,305 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:14:44,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:44,305 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:14:44,305 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:44,305 INFO L87 Difference]: Start difference. First operand 10160 states and 26605 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:44,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:44,735 INFO L93 Difference]: Finished difference Result 10211 states and 26683 transitions. [2021-07-09 17:14:44,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:14:44,736 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:44,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:44,750 INFO L225 Difference]: With dead ends: 10211 [2021-07-09 17:14:44,750 INFO L226 Difference]: Without dead ends: 10179 [2021-07-09 17:14:44,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 123.5ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:14:44,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10179 states. [2021-07-09 17:14:44,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10179 to 10160. [2021-07-09 17:14:44,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10160 states, 10159 states have (on average 2.6182695147160153) internal successors, (26599), 10159 states have internal predecessors, (26599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:44,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10160 states to 10160 states and 26599 transitions. [2021-07-09 17:14:44,883 INFO L78 Accepts]: Start accepts. Automaton has 10160 states and 26599 transitions. Word has length 53 [2021-07-09 17:14:44,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:44,883 INFO L482 AbstractCegarLoop]: Abstraction has 10160 states and 26599 transitions. [2021-07-09 17:14:44,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:44,883 INFO L276 IsEmpty]: Start isEmpty. Operand 10160 states and 26599 transitions. [2021-07-09 17:14:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:44,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:44,891 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:45,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable770,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:45,107 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:45,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:45,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1855932587, now seen corresponding path program 217 times [2021-07-09 17:14:45,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:45,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364931694] [2021-07-09 17:14:45,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:45,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:45,175 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:45,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:45,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364931694] [2021-07-09 17:14:45,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364931694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:45,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478995517] [2021-07-09 17:14:45,175 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 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:45,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:45,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:14:45,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 95 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:45,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478995517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:45,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:45,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 17:14:45,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349650882] [2021-07-09 17:14:45,297 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:14:45,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:45,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:14:45,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:45,297 INFO L87 Difference]: Start difference. First operand 10160 states and 26599 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:45,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:45,517 INFO L93 Difference]: Finished difference Result 12704 states and 31833 transitions. [2021-07-09 17:14:45,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:45,517 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:45,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:45,535 INFO L225 Difference]: With dead ends: 12704 [2021-07-09 17:14:45,535 INFO L226 Difference]: Without dead ends: 12704 [2021-07-09 17:14:45,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=113, Invalid=159, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:45,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12704 states. [2021-07-09 17:14:45,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12704 to 10580. [2021-07-09 17:14:45,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10580 states, 10579 states have (on average 2.632668494186596) internal successors, (27851), 10579 states have internal predecessors, (27851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:45,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10580 states to 10580 states and 27851 transitions. [2021-07-09 17:14:45,697 INFO L78 Accepts]: Start accepts. Automaton has 10580 states and 27851 transitions. Word has length 53 [2021-07-09 17:14:45,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:45,698 INFO L482 AbstractCegarLoop]: Abstraction has 10580 states and 27851 transitions. [2021-07-09 17:14:45,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:45,698 INFO L276 IsEmpty]: Start isEmpty. Operand 10580 states and 27851 transitions. [2021-07-09 17:14:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:45,706 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:45,706 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:45,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable771 [2021-07-09 17:14:45,922 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:45,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:45,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1668199042, now seen corresponding path program 106 times [2021-07-09 17:14:45,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:45,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264985932] [2021-07-09 17:14:45,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:46,003 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:46,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:46,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264985932] [2021-07-09 17:14:46,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264985932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:46,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215842848] [2021-07-09 17:14:46,003 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 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:46,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:46,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:14:46,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:46,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:14:46,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:14:46,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:46,124 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:14:46,125 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:14:46,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:46,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:14:46,130 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:46,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215842848] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:46,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:46,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 17:14:46,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770913068] [2021-07-09 17:14:46,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:14:46,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:46,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:14:46,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:46,131 INFO L87 Difference]: Start difference. First operand 10580 states and 27851 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:46,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:46,785 INFO L93 Difference]: Finished difference Result 13655 states and 34305 transitions. [2021-07-09 17:14:46,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:14:46,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:46,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:46,805 INFO L225 Difference]: With dead ends: 13655 [2021-07-09 17:14:46,805 INFO L226 Difference]: Without dead ends: 13599 [2021-07-09 17:14:46,805 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 175.5ms TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:14:46,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13599 states. [2021-07-09 17:14:46,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13599 to 11353. [2021-07-09 17:14:46,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 2.6204193093727977) internal successors, (29747), 11352 states have internal predecessors, (29747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29747 transitions. [2021-07-09 17:14:46,984 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29747 transitions. Word has length 53 [2021-07-09 17:14:46,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:46,984 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29747 transitions. [2021-07-09 17:14:46,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:46,984 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29747 transitions. [2021-07-09 17:14:46,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:46,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:46,993 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:47,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 374 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable774 [2021-07-09 17:14:47,209 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:47,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:47,211 INFO L82 PathProgramCache]: Analyzing trace with hash 34902658, now seen corresponding path program 218 times [2021-07-09 17:14:47,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:47,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829384169] [2021-07-09 17:14:47,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 16 proven. 116 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:47,298 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:47,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829384169] [2021-07-09 17:14:47,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829384169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:47,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131552586] [2021-07-09 17:14:47,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:47,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:47,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:47,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:47,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:47,434 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:47,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131552586] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:47,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:47,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 12 [2021-07-09 17:14:47,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888744079] [2021-07-09 17:14:47,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:14:47,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:47,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:14:47,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:14:47,444 INFO L87 Difference]: Start difference. First operand 11353 states and 29747 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:47,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:47,789 INFO L93 Difference]: Finished difference Result 11423 states and 29849 transitions. [2021-07-09 17:14:47,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:14:47,789 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:47,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:47,807 INFO L225 Difference]: With dead ends: 11423 [2021-07-09 17:14:47,808 INFO L226 Difference]: Without dead ends: 11403 [2021-07-09 17:14:47,819 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11403 states. [2021-07-09 17:14:47,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11403 to 11353. [2021-07-09 17:14:47,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11353 states, 11352 states have (on average 2.62015503875969) internal successors, (29744), 11352 states have internal predecessors, (29744), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:47,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11353 states to 11353 states and 29744 transitions. [2021-07-09 17:14:47,981 INFO L78 Accepts]: Start accepts. Automaton has 11353 states and 29744 transitions. Word has length 53 [2021-07-09 17:14:47,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:47,981 INFO L482 AbstractCegarLoop]: Abstraction has 11353 states and 29744 transitions. [2021-07-09 17:14:47,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:47,981 INFO L276 IsEmpty]: Start isEmpty. Operand 11353 states and 29744 transitions. [2021-07-09 17:14:47,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:47,990 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:47,990 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:48,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:48,206 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:48,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:48,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1588490357, now seen corresponding path program 107 times [2021-07-09 17:14:48,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:48,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624843133] [2021-07-09 17:14:48,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:48,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:48,293 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:48,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624843133] [2021-07-09 17:14:48,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624843133] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:48,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747589413] [2021-07-09 17:14:48,293 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:48,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:14:48,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:48,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:48,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 60 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:48,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747589413] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:48,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:48,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 16] total 19 [2021-07-09 17:14:48,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260037447] [2021-07-09 17:14:48,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:14:48,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:48,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:14:48,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:14:48,455 INFO L87 Difference]: Start difference. First operand 11353 states and 29744 transitions. Second operand has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:48,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:48,789 INFO L93 Difference]: Finished difference Result 12639 states and 32192 transitions. [2021-07-09 17:14:48,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:14:48,789 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:48,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:48,812 INFO L225 Difference]: With dead ends: 12639 [2021-07-09 17:14:48,812 INFO L226 Difference]: Without dead ends: 12617 [2021-07-09 17:14:48,812 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 136.8ms TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:14:48,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12617 states. [2021-07-09 17:14:48,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12617 to 11299. [2021-07-09 17:14:48,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11299 states, 11298 states have (on average 2.6222340237210124) internal successors, (29626), 11298 states have internal predecessors, (29626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:48,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11299 states to 11299 states and 29626 transitions. [2021-07-09 17:14:48,984 INFO L78 Accepts]: Start accepts. Automaton has 11299 states and 29626 transitions. Word has length 53 [2021-07-09 17:14:48,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:48,984 INFO L482 AbstractCegarLoop]: Abstraction has 11299 states and 29626 transitions. [2021-07-09 17:14:48,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.0) internal successors, (80), 19 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:48,984 INFO L276 IsEmpty]: Start isEmpty. Operand 11299 states and 29626 transitions. [2021-07-09 17:14:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:48,993 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:48,993 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:49,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable776 [2021-07-09 17:14:49,209 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:49,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:49,209 INFO L82 PathProgramCache]: Analyzing trace with hash 1668467447, now seen corresponding path program 219 times [2021-07-09 17:14:49,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:49,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074229328] [2021-07-09 17:14:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:49,274 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:49,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074229328] [2021-07-09 17:14:49,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074229328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:49,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991789093] [2021-07-09 17:14:49,274 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 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:49,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:14:49,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:49,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:49,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:49,390 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 58 proven. 76 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:49,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1991789093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:49,390 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:49,390 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:14:49,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321683013] [2021-07-09 17:14:49,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:14:49,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:49,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:14:49,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:49,392 INFO L87 Difference]: Start difference. First operand 11299 states and 29626 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:49,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:49,568 INFO L93 Difference]: Finished difference Result 14216 states and 35571 transitions. [2021-07-09 17:14:49,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:14:49,569 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:49,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:49,590 INFO L225 Difference]: With dead ends: 14216 [2021-07-09 17:14:49,590 INFO L226 Difference]: Without dead ends: 14216 [2021-07-09 17:14:49,590 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 60.1ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14216 states. [2021-07-09 17:14:49,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14216 to 11759. [2021-07-09 17:14:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11759 states, 11758 states have (on average 2.634886885524749) internal successors, (30981), 11758 states have internal predecessors, (30981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:49,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11759 states to 11759 states and 30981 transitions. [2021-07-09 17:14:49,782 INFO L78 Accepts]: Start accepts. Automaton has 11759 states and 30981 transitions. Word has length 53 [2021-07-09 17:14:49,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:49,782 INFO L482 AbstractCegarLoop]: Abstraction has 11759 states and 30981 transitions. [2021-07-09 17:14:49,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:49,782 INFO L276 IsEmpty]: Start isEmpty. Operand 11759 states and 30981 transitions. [2021-07-09 17:14:49,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:49,913 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:49,913 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:50,129 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable779,377 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:50,129 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:50,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:50,130 INFO L82 PathProgramCache]: Analyzing trace with hash 1430405930, now seen corresponding path program 108 times [2021-07-09 17:14:50,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:50,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144714942] [2021-07-09 17:14:50,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:50,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144714942] [2021-07-09 17:14:50,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144714942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:50,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [988284742] [2021-07-09 17:14:50,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:50,286 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:14:50,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:50,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:50,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:50,362 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 7 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:50,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [988284742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:50,362 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:50,362 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:14:50,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074520727] [2021-07-09 17:14:50,362 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:14:50,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:50,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:14:50,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:50,362 INFO L87 Difference]: Start difference. First operand 11759 states and 30981 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) [2021-07-09 17:14:50,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:50,820 INFO L93 Difference]: Finished difference Result 12771 states and 32920 transitions. [2021-07-09 17:14:50,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:14:50,820 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.909090909090909) internal successors, (54), 10 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:50,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:50,839 INFO L225 Difference]: With dead ends: 12771 [2021-07-09 17:14:50,839 INFO L226 Difference]: Without dead ends: 12763 [2021-07-09 17:14:50,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 141.7ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:50,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12763 states. [2021-07-09 17:14:50,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12763 to 11651. [2021-07-09 17:14:50,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11651 states, 11650 states have (on average 2.6366523605150216) internal successors, (30717), 11650 states have internal predecessors, (30717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:51,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11651 states to 11651 states and 30717 transitions. [2021-07-09 17:14:51,017 INFO L78 Accepts]: Start accepts. Automaton has 11651 states and 30717 transitions. Word has length 53 [2021-07-09 17:14:51,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:51,018 INFO L482 AbstractCegarLoop]: Abstraction has 11651 states and 30717 transitions. [2021-07-09 17:14:51,018 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) [2021-07-09 17:14:51,018 INFO L276 IsEmpty]: Start isEmpty. Operand 11651 states and 30717 transitions. [2021-07-09 17:14:51,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:51,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:51,027 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:51,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable780,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:51,243 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:51,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:51,244 INFO L82 PathProgramCache]: Analyzing trace with hash -123290927, now seen corresponding path program 220 times [2021-07-09 17:14:51,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:51,244 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796087281] [2021-07-09 17:14:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:51,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:51,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796087281] [2021-07-09 17:14:51,304 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796087281] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:51,304 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394273932] [2021-07-09 17:14:51,304 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:51,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:51,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:51,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:51,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:51,407 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:51,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394273932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:51,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:51,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:14:51,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509491628] [2021-07-09 17:14:51,408 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:14:51,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:51,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:14:51,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:51,408 INFO L87 Difference]: Start difference. First operand 11651 states and 30717 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:51,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:51,559 INFO L93 Difference]: Finished difference Result 13925 states and 34879 transitions. [2021-07-09 17:14:51,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:14:51,559 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:51,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:51,579 INFO L225 Difference]: With dead ends: 13925 [2021-07-09 17:14:51,579 INFO L226 Difference]: Without dead ends: 13922 [2021-07-09 17:14:51,579 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:51,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13922 states. [2021-07-09 17:14:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13922 to 11650. [2021-07-09 17:14:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 2.6362777920851577) internal successors, (30710), 11649 states have internal predecessors, (30710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:51,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30710 transitions. [2021-07-09 17:14:51,772 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30710 transitions. Word has length 53 [2021-07-09 17:14:51,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:51,773 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30710 transitions. [2021-07-09 17:14:51,773 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:51,773 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30710 transitions. [2021-07-09 17:14:51,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:51,783 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:51,783 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:52,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:52,000 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:52,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:52,000 INFO L82 PathProgramCache]: Analyzing trace with hash 83771639, now seen corresponding path program 221 times [2021-07-09 17:14:52,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:52,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701193598] [2021-07-09 17:14:52,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:52,067 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 65 proven. 68 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:52,068 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:52,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701193598] [2021-07-09 17:14:52,068 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701193598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:52,068 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960635965] [2021-07-09 17:14:52,068 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 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:52,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:14:52,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:52,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:52,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:52,243 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 68 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:52,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960635965] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:52,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:52,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 13 [2021-07-09 17:14:52,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710588096] [2021-07-09 17:14:52,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:14:52,244 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:52,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:14:52,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:52,244 INFO L87 Difference]: Start difference. First operand 11650 states and 30710 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:52,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:52,446 INFO L93 Difference]: Finished difference Result 14037 states and 35373 transitions. [2021-07-09 17:14:52,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:14:52,446 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:52,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:52,466 INFO L225 Difference]: With dead ends: 14037 [2021-07-09 17:14:52,467 INFO L226 Difference]: Without dead ends: 14025 [2021-07-09 17:14:52,467 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 91.8ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:52,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14025 states. [2021-07-09 17:14:52,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14025 to 11650. [2021-07-09 17:14:52,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11650 states, 11649 states have (on average 2.636020259249721) internal successors, (30707), 11649 states have internal predecessors, (30707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:52,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11650 states to 11650 states and 30707 transitions. [2021-07-09 17:14:52,648 INFO L78 Accepts]: Start accepts. Automaton has 11650 states and 30707 transitions. Word has length 53 [2021-07-09 17:14:52,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:52,648 INFO L482 AbstractCegarLoop]: Abstraction has 11650 states and 30707 transitions. [2021-07-09 17:14:52,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:52,648 INFO L276 IsEmpty]: Start isEmpty. Operand 11650 states and 30707 transitions. [2021-07-09 17:14:52,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:52,657 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:52,657 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:52,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 380 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-07-09 17:14:52,873 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:52,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:52,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1364228374, now seen corresponding path program 222 times [2021-07-09 17:14:52,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:52,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412563835] [2021-07-09 17:14:52,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:52,950 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 17 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:52,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:52,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412563835] [2021-07-09 17:14:52,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412563835] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:52,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089606490] [2021-07-09 17:14:52,950 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 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:52,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:14:52,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:52,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:52,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:53,068 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 13 proven. 119 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:53,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089606490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:53,069 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:53,069 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-07-09 17:14:53,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397123342] [2021-07-09 17:14:53,069 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:14:53,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:53,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:14:53,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:53,069 INFO L87 Difference]: Start difference. First operand 11650 states and 30707 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:53,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:53,657 INFO L93 Difference]: Finished difference Result 12517 states and 32320 transitions. [2021-07-09 17:14:53,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:14:53,658 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:53,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:53,678 INFO L225 Difference]: With dead ends: 12517 [2021-07-09 17:14:53,678 INFO L226 Difference]: Without dead ends: 12384 [2021-07-09 17:14:53,679 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 130.9ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12384 states. [2021-07-09 17:14:53,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12384 to 11825. [2021-07-09 17:14:53,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11825 states, 11824 states have (on average 2.6268606224627877) internal successors, (31060), 11824 states have internal predecessors, (31060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:53,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11825 states to 11825 states and 31060 transitions. [2021-07-09 17:14:53,854 INFO L78 Accepts]: Start accepts. Automaton has 11825 states and 31060 transitions. Word has length 53 [2021-07-09 17:14:53,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:53,854 INFO L482 AbstractCegarLoop]: Abstraction has 11825 states and 31060 transitions. [2021-07-09 17:14:53,854 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:53,855 INFO L276 IsEmpty]: Start isEmpty. Operand 11825 states and 31060 transitions. [2021-07-09 17:14:53,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:53,864 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:53,864 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:54,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-07-09 17:14:54,080 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:54,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:54,080 INFO L82 PathProgramCache]: Analyzing trace with hash -1977764554, now seen corresponding path program 223 times [2021-07-09 17:14:54,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:54,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107124286] [2021-07-09 17:14:54,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:54,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:54,159 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 116 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:54,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:54,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107124286] [2021-07-09 17:14:54,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [107124286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:54,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429291189] [2021-07-09 17:14:54,159 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:54,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:54,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:54,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:54,263 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 117 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:14:54,263 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429291189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:54,263 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:54,263 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 10 [2021-07-09 17:14:54,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882914702] [2021-07-09 17:14:54,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:14:54,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:54,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:14:54,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:14:54,264 INFO L87 Difference]: Start difference. First operand 11825 states and 31060 transitions. Second operand has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:54,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:54,653 INFO L93 Difference]: Finished difference Result 12581 states and 32513 transitions. [2021-07-09 17:14:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:14:54,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:54,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:54,674 INFO L225 Difference]: With dead ends: 12581 [2021-07-09 17:14:54,674 INFO L226 Difference]: Without dead ends: 12569 [2021-07-09 17:14:54,674 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:14:54,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12569 states. [2021-07-09 17:14:54,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12569 to 11827. [2021-07-09 17:14:54,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11827 states, 11826 states have (on average 2.6267546084897684) internal successors, (31064), 11826 states have internal predecessors, (31064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:54,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11827 states to 11827 states and 31064 transitions. [2021-07-09 17:14:54,863 INFO L78 Accepts]: Start accepts. Automaton has 11827 states and 31064 transitions. Word has length 53 [2021-07-09 17:14:54,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:54,863 INFO L482 AbstractCegarLoop]: Abstraction has 11827 states and 31064 transitions. [2021-07-09 17:14:54,864 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.818181818181818) internal successors, (53), 10 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:54,864 INFO L276 IsEmpty]: Start isEmpty. Operand 11827 states and 31064 transitions. [2021-07-09 17:14:54,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:54,873 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:54,873 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:55,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable787,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:55,090 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:55,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:55,090 INFO L82 PathProgramCache]: Analyzing trace with hash 164152780, now seen corresponding path program 224 times [2021-07-09 17:14:55,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:55,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458683515] [2021-07-09 17:14:55,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:55,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:55,168 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:55,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:55,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458683515] [2021-07-09 17:14:55,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458683515] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:55,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262172476] [2021-07-09 17:14:55,168 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 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:55,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:14:55,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:55,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:14:55,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:55,272 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:55,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262172476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:55,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:55,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:14:55,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705838641] [2021-07-09 17:14:55,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:55,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:55,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:55,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:55,273 INFO L87 Difference]: Start difference. First operand 11827 states and 31064 transitions. Second operand has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:55,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:55,935 INFO L93 Difference]: Finished difference Result 13836 states and 35142 transitions. [2021-07-09 17:14:55,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:14:55,936 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:55,963 INFO L225 Difference]: With dead ends: 13836 [2021-07-09 17:14:55,963 INFO L226 Difference]: Without dead ends: 13782 [2021-07-09 17:14:55,963 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 256.2ms TimeCoverageRelationStatistics Valid=123, Invalid=807, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:14:55,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13782 states. [2021-07-09 17:14:56,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13782 to 11958. [2021-07-09 17:14:56,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11958 states, 11957 states have (on average 2.6264113071840764) internal successors, (31404), 11957 states have internal predecessors, (31404), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:56,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11958 states to 11958 states and 31404 transitions. [2021-07-09 17:14:56,159 INFO L78 Accepts]: Start accepts. Automaton has 11958 states and 31404 transitions. Word has length 53 [2021-07-09 17:14:56,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:56,159 INFO L482 AbstractCegarLoop]: Abstraction has 11958 states and 31404 transitions. [2021-07-09 17:14:56,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.5) internal successors, (54), 11 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:56,159 INFO L276 IsEmpty]: Start isEmpty. Operand 11958 states and 31404 transitions. [2021-07-09 17:14:56,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:56,168 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:56,168 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:56,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable788 [2021-07-09 17:14:56,385 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:56,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:56,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1696711889, now seen corresponding path program 225 times [2021-07-09 17:14:56,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:56,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118842841] [2021-07-09 17:14:56,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:56,456 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:56,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:56,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118842841] [2021-07-09 17:14:56,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118842841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:56,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742916562] [2021-07-09 17:14:56,456 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 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:56,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:14:56,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:56,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:56,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:56,560 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 51 proven. 84 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:56,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742916562] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:56,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:56,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:14:56,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222261752] [2021-07-09 17:14:56,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:14:56,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:56,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:14:56,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:14:56,561 INFO L87 Difference]: Start difference. First operand 11958 states and 31404 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:56,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:56,729 INFO L93 Difference]: Finished difference Result 14190 states and 35732 transitions. [2021-07-09 17:14:56,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:14:56,729 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:56,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:56,750 INFO L225 Difference]: With dead ends: 14190 [2021-07-09 17:14:56,750 INFO L226 Difference]: Without dead ends: 14172 [2021-07-09 17:14:56,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 73.7ms TimeCoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:14:56,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14172 states. [2021-07-09 17:14:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14172 to 12156. [2021-07-09 17:14:56,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12156 states, 12155 states have (on average 2.6338955162484576) internal successors, (32015), 12155 states have internal predecessors, (32015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:56,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12156 states to 12156 states and 32015 transitions. [2021-07-09 17:14:56,942 INFO L78 Accepts]: Start accepts. Automaton has 12156 states and 32015 transitions. Word has length 53 [2021-07-09 17:14:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:56,942 INFO L482 AbstractCegarLoop]: Abstraction has 12156 states and 32015 transitions. [2021-07-09 17:14:56,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 12156 states and 32015 transitions. [2021-07-09 17:14:56,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:56,951 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:56,951 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:57,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable789 [2021-07-09 17:14:57,167 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:57,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:57,167 INFO L82 PathProgramCache]: Analyzing trace with hash 318989314, now seen corresponding path program 226 times [2021-07-09 17:14:57,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:57,167 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610799608] [2021-07-09 17:14:57,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:57,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:57,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:57,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610799608] [2021-07-09 17:14:57,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610799608] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:57,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087471987] [2021-07-09 17:14:57,252 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 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:57,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:14:57,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:14:57,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:57,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:14:57,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:14:57,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:14:57,389 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:14:57,389 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:14:57,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:14:57,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:14:57,396 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:14:57,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087471987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:57,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:57,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-07-09 17:14:57,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222923565] [2021-07-09 17:14:57,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:14:57,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:57,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:14:57,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:57,397 INFO L87 Difference]: Start difference. First operand 12156 states and 32015 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:58,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:58,633 INFO L93 Difference]: Finished difference Result 16988 states and 42019 transitions. [2021-07-09 17:14:58,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-07-09 17:14:58,634 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:58,661 INFO L225 Difference]: With dead ends: 16988 [2021-07-09 17:14:58,662 INFO L226 Difference]: Without dead ends: 16820 [2021-07-09 17:14:58,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 553.5ms TimeCoverageRelationStatistics Valid=321, Invalid=2649, Unknown=0, NotChecked=0, Total=2970 [2021-07-09 17:14:58,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16820 states. [2021-07-09 17:14:58,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16820 to 12541. [2021-07-09 17:14:58,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 12540 states have (on average 2.6271132376395534) internal successors, (32944), 12540 states have internal predecessors, (32944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:58,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32944 transitions. [2021-07-09 17:14:58,889 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32944 transitions. Word has length 53 [2021-07-09 17:14:58,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:58,889 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32944 transitions. [2021-07-09 17:14:58,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:58,889 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32944 transitions. [2021-07-09 17:14:58,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:58,898 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:58,898 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:14:59,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable793,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:59,114 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:14:59,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:14:59,114 INFO L82 PathProgramCache]: Analyzing trace with hash 705591991, now seen corresponding path program 227 times [2021-07-09 17:14:59,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:14:59,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539836456] [2021-07-09 17:14:59,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:14:59,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:14:59,195 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 43 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:14:59,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:14:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539836456] [2021-07-09 17:14:59,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539836456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:59,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812817795] [2021-07-09 17:14:59,196 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 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:14:59,231 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:14:59,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:14:59,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:14:59,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:14:59,328 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 44 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:14:59,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812817795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:14:59,329 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:14:59,329 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-07-09 17:14:59,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348959480] [2021-07-09 17:14:59,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:14:59,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:14:59,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:14:59,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:14:59,329 INFO L87 Difference]: Start difference. First operand 12541 states and 32944 transitions. Second operand has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:59,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:14:59,554 INFO L93 Difference]: Finished difference Result 14864 states and 37234 transitions. [2021-07-09 17:14:59,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:14:59,555 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:14:59,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:14:59,577 INFO L225 Difference]: With dead ends: 14864 [2021-07-09 17:14:59,577 INFO L226 Difference]: Without dead ends: 14837 [2021-07-09 17:14:59,577 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 117.5ms TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:14:59,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14837 states. [2021-07-09 17:14:59,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14837 to 12541. [2021-07-09 17:14:59,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12541 states, 12540 states have (on average 2.626874003189793) internal successors, (32941), 12540 states have internal predecessors, (32941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:59,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12541 states to 12541 states and 32941 transitions. [2021-07-09 17:14:59,784 INFO L78 Accepts]: Start accepts. Automaton has 12541 states and 32941 transitions. Word has length 53 [2021-07-09 17:14:59,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:14:59,784 INFO L482 AbstractCegarLoop]: Abstraction has 12541 states and 32941 transitions. [2021-07-09 17:14:59,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.0625) internal successors, (65), 15 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:14:59,784 INFO L276 IsEmpty]: Start isEmpty. Operand 12541 states and 32941 transitions. [2021-07-09 17:14:59,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:14:59,794 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:14:59,794 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:00,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-07-09 17:15:00,010 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:00,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:00,011 INFO L82 PathProgramCache]: Analyzing trace with hash 259297804, now seen corresponding path program 228 times [2021-07-09 17:15:00,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:00,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548136879] [2021-07-09 17:15:00,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:00,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:00,158 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-07-09 17:15:00,250 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:00,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:00,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548136879] [2021-07-09 17:15:00,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548136879] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:00,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253508251] [2021-07-09 17:15:00,250 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 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:00,280 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:15:00,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:00,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:15:00,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:00,358 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:00,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253508251] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:00,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:00,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:15:00,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193246938] [2021-07-09 17:15:00,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:00,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:00,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:00,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:00,359 INFO L87 Difference]: Start difference. First operand 12541 states and 32941 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:02,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:02,240 INFO L93 Difference]: Finished difference Result 23524 states and 56000 transitions. [2021-07-09 17:15:02,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-07-09 17:15:02,241 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:02,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:02,280 INFO L225 Difference]: With dead ends: 23524 [2021-07-09 17:15:02,280 INFO L226 Difference]: Without dead ends: 23068 [2021-07-09 17:15:02,282 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3318 ImplicationChecksByTransitivity, 1301.0ms TimeCoverageRelationStatistics Valid=807, Invalid=8123, Unknown=0, NotChecked=0, Total=8930 [2021-07-09 17:15:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23068 states. [2021-07-09 17:15:02,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23068 to 13305. [2021-07-09 17:15:02,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13305 states, 13304 states have (on average 2.6126728803367407) internal successors, (34759), 13304 states have internal predecessors, (34759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:02,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34759 transitions. [2021-07-09 17:15:02,576 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34759 transitions. Word has length 53 [2021-07-09 17:15:02,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:02,576 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34759 transitions. [2021-07-09 17:15:02,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:02,577 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34759 transitions. [2021-07-09 17:15:02,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:15:02,587 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:02,587 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:02,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable799,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:02,805 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:02,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:02,805 INFO L82 PathProgramCache]: Analyzing trace with hash -2142096623, now seen corresponding path program 229 times [2021-07-09 17:15:02,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:02,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646202276] [2021-07-09 17:15:02,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:02,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:02,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:02,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646202276] [2021-07-09 17:15:02,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646202276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:02,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916154344] [2021-07-09 17:15:02,904 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 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:02,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:02,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:15:02,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 41 proven. 94 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:03,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [916154344] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:03,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:03,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:15:03,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723660796] [2021-07-09 17:15:03,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:03,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:03,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:03,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:03,012 INFO L87 Difference]: Start difference. First operand 13305 states and 34759 transitions. Second operand has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:03,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:03,276 INFO L93 Difference]: Finished difference Result 15631 states and 39032 transitions. [2021-07-09 17:15:03,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:15:03,276 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:03,308 INFO L225 Difference]: With dead ends: 15631 [2021-07-09 17:15:03,308 INFO L226 Difference]: Without dead ends: 15595 [2021-07-09 17:15:03,308 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:03,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15595 states. [2021-07-09 17:15:03,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15595 to 13305. [2021-07-09 17:15:03,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13305 states, 13304 states have (on average 2.61244738424534) internal successors, (34756), 13304 states have internal predecessors, (34756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:03,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13305 states to 13305 states and 34756 transitions. [2021-07-09 17:15:03,589 INFO L78 Accepts]: Start accepts. Automaton has 13305 states and 34756 transitions. Word has length 53 [2021-07-09 17:15:03,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:03,589 INFO L482 AbstractCegarLoop]: Abstraction has 13305 states and 34756 transitions. [2021-07-09 17:15:03,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.7857142857142856) internal successors, (53), 13 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:03,589 INFO L276 IsEmpty]: Start isEmpty. Operand 13305 states and 34756 transitions. [2021-07-09 17:15:03,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:15:03,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:03,602 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:03,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable800 [2021-07-09 17:15:03,822 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:03,823 INFO L82 PathProgramCache]: Analyzing trace with hash 105983938, now seen corresponding path program 230 times [2021-07-09 17:15:03,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:03,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863304265] [2021-07-09 17:15:03,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:03,939 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:03,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:03,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863304265] [2021-07-09 17:15:03,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863304265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:03,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92779523] [2021-07-09 17:15:03,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:03,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:03,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:03,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:15:03,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:04,045 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:04,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92779523] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:04,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:04,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:15:04,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778065867] [2021-07-09 17:15:04,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:04,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:04,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:04,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:04,046 INFO L87 Difference]: Start difference. First operand 13305 states and 34756 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:07,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:07,292 INFO L93 Difference]: Finished difference Result 39717 states and 90677 transitions. [2021-07-09 17:15:07,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2021-07-09 17:15:07,293 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:07,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:07,388 INFO L225 Difference]: With dead ends: 39717 [2021-07-09 17:15:07,389 INFO L226 Difference]: Without dead ends: 38331 [2021-07-09 17:15:07,392 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10453 ImplicationChecksByTransitivity, 2286.8ms TimeCoverageRelationStatistics Valid=1941, Invalid=23181, Unknown=0, NotChecked=0, Total=25122 [2021-07-09 17:15:07,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38331 states. [2021-07-09 17:15:07,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38331 to 14578. [2021-07-09 17:15:07,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14578 states, 14577 states have (on average 2.592371544213487) internal successors, (37789), 14577 states have internal predecessors, (37789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:07,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37789 transitions. [2021-07-09 17:15:07,957 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37789 transitions. Word has length 53 [2021-07-09 17:15:07,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:07,957 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37789 transitions. [2021-07-09 17:15:07,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 14 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:07,957 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37789 transitions. [2021-07-09 17:15:07,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:15:07,969 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:07,969 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:08,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,389 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:08,185 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:08,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:08,185 INFO L82 PathProgramCache]: Analyzing trace with hash 855401591, now seen corresponding path program 231 times [2021-07-09 17:15:08,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:08,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893726353] [2021-07-09 17:15:08,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:08,329 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:08,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:08,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893726353] [2021-07-09 17:15:08,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893726353] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:08,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938688276] [2021-07-09 17:15:08,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:08,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:15:08,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:08,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:15:08,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:08,437 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 45 proven. 90 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:08,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938688276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:08,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:08,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:15:08,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118709932] [2021-07-09 17:15:08,437 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:08,437 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:08,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:08,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:08,437 INFO L87 Difference]: Start difference. First operand 14578 states and 37789 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:08,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:08,683 INFO L93 Difference]: Finished difference Result 17260 states and 42750 transitions. [2021-07-09 17:15:08,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:08,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:08,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:08,714 INFO L225 Difference]: With dead ends: 17260 [2021-07-09 17:15:08,714 INFO L226 Difference]: Without dead ends: 17215 [2021-07-09 17:15:08,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:15:08,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17215 states. [2021-07-09 17:15:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17215 to 14578. [2021-07-09 17:15:08,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14578 states, 14577 states have (on average 2.5921657405501817) internal successors, (37786), 14577 states have internal predecessors, (37786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:08,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14578 states to 14578 states and 37786 transitions. [2021-07-09 17:15:08,983 INFO L78 Accepts]: Start accepts. Automaton has 14578 states and 37786 transitions. Word has length 53 [2021-07-09 17:15:08,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:08,983 INFO L482 AbstractCegarLoop]: Abstraction has 14578 states and 37786 transitions. [2021-07-09 17:15:08,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 14 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:08,984 INFO L276 IsEmpty]: Start isEmpty. Operand 14578 states and 37786 transitions. [2021-07-09 17:15:08,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:15:08,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:08,994 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:09,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable807 [2021-07-09 17:15:09,210 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:09,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:09,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1717162420, now seen corresponding path program 232 times [2021-07-09 17:15:09,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:09,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761436142] [2021-07-09 17:15:09,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:09,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:09,331 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 15 proven. 117 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:09,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:09,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761436142] [2021-07-09 17:15:09,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761436142] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:09,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004070098] [2021-07-09 17:15:09,332 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 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:09,361 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:09,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:09,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 32 conjunts are in the unsatisfiable core [2021-07-09 17:15:09,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:09,540 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:15:09,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:15:09,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:15:09,543 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:15:09,544 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:15:09,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:15:09,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:15:09,551 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 18 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:09,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004070098] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:09,551 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:09,551 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-07-09 17:15:09,551 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365977569] [2021-07-09 17:15:09,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:15:09,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:09,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:15:09,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=407, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:15:09,551 INFO L87 Difference]: Start difference. First operand 14578 states and 37786 transitions. Second operand has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:15,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:15,277 INFO L93 Difference]: Finished difference Result 44078 states and 101715 transitions. [2021-07-09 17:15:15,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 255 states. [2021-07-09 17:15:15,277 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:15,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:15,401 INFO L225 Difference]: With dead ends: 44078 [2021-07-09 17:15:15,402 INFO L226 Difference]: Without dead ends: 42758 [2021-07-09 17:15:15,410 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28740 ImplicationChecksByTransitivity, 4477.1ms TimeCoverageRelationStatistics Valid=4371, Invalid=60399, Unknown=0, NotChecked=0, Total=64770 [2021-07-09 17:15:15,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42758 states. [2021-07-09 17:15:15,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42758 to 16260. [2021-07-09 17:15:15,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16260 states, 16259 states have (on average 2.578448859093425) internal successors, (41923), 16259 states have internal predecessors, (41923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:15,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41923 transitions. [2021-07-09 17:15:15,982 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41923 transitions. Word has length 53 [2021-07-09 17:15:15,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:15,982 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41923 transitions. [2021-07-09 17:15:15,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.090909090909091) internal successors, (68), 21 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:15,982 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41923 transitions. [2021-07-09 17:15:15,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:15:15,997 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:15,997 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:16,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable814,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:16,202 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:16,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:16,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1635323567, now seen corresponding path program 233 times [2021-07-09 17:15:16,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:16,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152309274] [2021-07-09 17:15:16,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:16,344 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:16,344 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:16,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152309274] [2021-07-09 17:15:16,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152309274] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:16,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845511989] [2021-07-09 17:15:16,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:16,374 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:15:16,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:16,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:15:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 55 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:16,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845511989] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:16,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:16,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 18 [2021-07-09 17:15:16,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609812766] [2021-07-09 17:15:16,516 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:15:16,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:16,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:15:16,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:16,516 INFO L87 Difference]: Start difference. First operand 16260 states and 41923 transitions. Second operand has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:16,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:16,884 INFO L93 Difference]: Finished difference Result 19781 states and 48513 transitions. [2021-07-09 17:15:16,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:15:16,885 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:16,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:16,923 INFO L225 Difference]: With dead ends: 19781 [2021-07-09 17:15:16,923 INFO L226 Difference]: Without dead ends: 19727 [2021-07-09 17:15:16,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 215.7ms TimeCoverageRelationStatistics Valid=167, Invalid=433, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:15:16,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19727 states. [2021-07-09 17:15:17,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19727 to 16260. [2021-07-09 17:15:17,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16260 states, 16259 states have (on average 2.578264345900732) internal successors, (41920), 16259 states have internal predecessors, (41920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:17,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16260 states to 16260 states and 41920 transitions. [2021-07-09 17:15:17,296 INFO L78 Accepts]: Start accepts. Automaton has 16260 states and 41920 transitions. Word has length 53 [2021-07-09 17:15:17,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:17,296 INFO L482 AbstractCegarLoop]: Abstraction has 16260 states and 41920 transitions. [2021-07-09 17:15:17,296 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.4210526315789473) internal successors, (65), 18 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:17,296 INFO L276 IsEmpty]: Start isEmpty. Operand 16260 states and 41920 transitions. [2021-07-09 17:15:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:15:17,310 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:17,310 INFO L508 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:17,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable815 [2021-07-09 17:15:17,520 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:17,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:17,521 INFO L82 PathProgramCache]: Analyzing trace with hash -913888382, now seen corresponding path program 234 times [2021-07-09 17:15:17,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:17,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121407880] [2021-07-09 17:15:17,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:17,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:17,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:17,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121407880] [2021-07-09 17:15:17,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121407880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:17,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553575987] [2021-07-09 17:15:17,677 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 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:17,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:15:17,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:17,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 29 conjunts are in the unsatisfiable core [2021-07-09 17:15:17,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:17,784 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 14 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:17,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553575987] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:17,784 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:17,784 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-09 17:15:17,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453821555] [2021-07-09 17:15:17,784 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:15:17,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:17,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:15:17,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:17,785 INFO L87 Difference]: Start difference. First operand 16260 states and 41920 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:18,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:18,549 INFO L93 Difference]: Finished difference Result 21764 states and 52143 transitions. [2021-07-09 17:15:18,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:15:18,550 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:18,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:18,594 INFO L225 Difference]: With dead ends: 21764 [2021-07-09 17:15:18,594 INFO L226 Difference]: Without dead ends: 19982 [2021-07-09 17:15:18,594 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 427.7ms TimeCoverageRelationStatistics Valid=218, Invalid=1042, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:15:18,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19982 states. [2021-07-09 17:15:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19982 to 11673. [2021-07-09 17:15:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11673 states, 11672 states have (on average 2.643762851267992) internal successors, (30858), 11672 states have internal predecessors, (30858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:18,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11673 states to 11673 states and 30858 transitions. [2021-07-09 17:15:18,861 INFO L78 Accepts]: Start accepts. Automaton has 11673 states and 30858 transitions. Word has length 53 [2021-07-09 17:15:18,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:18,861 INFO L482 AbstractCegarLoop]: Abstraction has 11673 states and 30858 transitions. [2021-07-09 17:15:18,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:18,861 INFO L276 IsEmpty]: Start isEmpty. Operand 11673 states and 30858 transitions. [2021-07-09 17:15:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:15:18,871 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:18,871 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:19,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable823,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:19,089 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:19,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:19,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1151949899, now seen corresponding path program 109 times [2021-07-09 17:15:19,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:19,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966294073] [2021-07-09 17:15:19,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:19,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:19,156 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:19,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966294073] [2021-07-09 17:15:19,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966294073] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:19,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391509210] [2021-07-09 17:15:19,156 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 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:19,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:15:19,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:19,272 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:19,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391509210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:19,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:19,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 12 [2021-07-09 17:15:19,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739210332] [2021-07-09 17:15:19,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:19,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:19,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:19,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=95, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:19,273 INFO L87 Difference]: Start difference. First operand 11673 states and 30858 transitions. Second operand has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:19,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:19,507 INFO L93 Difference]: Finished difference Result 13241 states and 34204 transitions. [2021-07-09 17:15:19,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:15:19,507 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:19,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:19,536 INFO L225 Difference]: With dead ends: 13241 [2021-07-09 17:15:19,536 INFO L226 Difference]: Without dead ends: 13227 [2021-07-09 17:15:19,536 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 87.7ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:19,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13227 states. [2021-07-09 17:15:19,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13227 to 12216. [2021-07-09 17:15:19,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12216 states, 12215 states have (on average 2.644617273843635) internal successors, (32304), 12215 states have internal predecessors, (32304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:19,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12216 states to 12216 states and 32304 transitions. [2021-07-09 17:15:19,811 INFO L78 Accepts]: Start accepts. Automaton has 12216 states and 32304 transitions. Word has length 53 [2021-07-09 17:15:19,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:19,811 INFO L482 AbstractCegarLoop]: Abstraction has 12216 states and 32304 transitions. [2021-07-09 17:15:19,811 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.6923076923076925) internal successors, (61), 12 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:19,811 INFO L276 IsEmpty]: Start isEmpty. Operand 12216 states and 32304 transitions. [2021-07-09 17:15:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:15:19,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:19,821 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:20,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable824,394 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:20,029 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:20,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:20,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1773830309, now seen corresponding path program 110 times [2021-07-09 17:15:20,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:20,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984741171] [2021-07-09 17:15:20,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:20,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:20,093 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:20,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:20,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984741171] [2021-07-09 17:15:20,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984741171] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:20,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1196222314] [2021-07-09 17:15:20,093 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 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:20,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:20,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:20,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:15:20,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 89 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:20,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1196222314] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:20,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:20,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 11 [2021-07-09 17:15:20,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778750197] [2021-07-09 17:15:20,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:20,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:20,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:20,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:20,198 INFO L87 Difference]: Start difference. First operand 12216 states and 32304 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:20,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:20,529 INFO L93 Difference]: Finished difference Result 14309 states and 36490 transitions. [2021-07-09 17:15:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:15:20,529 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:20,563 INFO L225 Difference]: With dead ends: 14309 [2021-07-09 17:15:20,563 INFO L226 Difference]: Without dead ends: 14309 [2021-07-09 17:15:20,563 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 115.3ms TimeCoverageRelationStatistics Valid=141, Invalid=201, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:20,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14309 states. [2021-07-09 17:15:20,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14309 to 12222. [2021-07-09 17:15:20,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12222 states, 12221 states have (on average 2.6448735782669175) internal successors, (32323), 12221 states have internal predecessors, (32323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:20,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12222 states to 12222 states and 32323 transitions. [2021-07-09 17:15:20,849 INFO L78 Accepts]: Start accepts. Automaton has 12222 states and 32323 transitions. Word has length 53 [2021-07-09 17:15:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:20,849 INFO L482 AbstractCegarLoop]: Abstraction has 12222 states and 32323 transitions. [2021-07-09 17:15:20,849 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:20,849 INFO L276 IsEmpty]: Start isEmpty. Operand 12222 states and 32323 transitions. [2021-07-09 17:15:20,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:15:20,862 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:20,862 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:21,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:21,077 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:21,077 INFO L82 PathProgramCache]: Analyzing trace with hash 883564531, now seen corresponding path program 111 times [2021-07-09 17:15:21,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:21,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350894852] [2021-07-09 17:15:21,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:21,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:21,155 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 90 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:21,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:21,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350894852] [2021-07-09 17:15:21,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350894852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:21,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111193527] [2021-07-09 17:15:21,156 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 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:21,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:15:21,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:21,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:15:21,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:21,299 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 91 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:21,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111193527] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:21,299 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:21,299 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-07-09 17:15:21,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105532285] [2021-07-09 17:15:21,299 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:21,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:21,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:21,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:21,300 INFO L87 Difference]: Start difference. First operand 12222 states and 32323 transitions. Second operand has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:21,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:21,783 INFO L93 Difference]: Finished difference Result 13621 states and 34955 transitions. [2021-07-09 17:15:21,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:15:21,783 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:21,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:21,812 INFO L225 Difference]: With dead ends: 13621 [2021-07-09 17:15:21,813 INFO L226 Difference]: Without dead ends: 13621 [2021-07-09 17:15:21,813 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 264.9ms TimeCoverageRelationStatistics Valid=324, Invalid=546, Unknown=0, NotChecked=0, Total=870 [2021-07-09 17:15:21,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13621 states. [2021-07-09 17:15:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13621 to 12015. [2021-07-09 17:15:22,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12015 states, 12014 states have (on average 2.647411353421009) internal successors, (31806), 12014 states have internal predecessors, (31806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:22,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12015 states to 12015 states and 31806 transitions. [2021-07-09 17:15:22,071 INFO L78 Accepts]: Start accepts. Automaton has 12015 states and 31806 transitions. Word has length 53 [2021-07-09 17:15:22,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:22,071 INFO L482 AbstractCegarLoop]: Abstraction has 12015 states and 31806 transitions. [2021-07-09 17:15:22,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.066666666666666) internal successors, (61), 14 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:22,071 INFO L276 IsEmpty]: Start isEmpty. Operand 12015 states and 31806 transitions. [2021-07-09 17:15:22,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-07-09 17:15:22,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:22,083 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:22,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:22,293 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:22,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:22,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1321467447, now seen corresponding path program 235 times [2021-07-09 17:15:22,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:22,293 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897392857] [2021-07-09 17:15:22,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:22,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:22,427 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:22,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897392857] [2021-07-09 17:15:22,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897392857] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:22,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032459203] [2021-07-09 17:15:22,427 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 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:22,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-09 17:15:22,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 72 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:22,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032459203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:22,536 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:22,536 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-09 17:15:22,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410964807] [2021-07-09 17:15:22,536 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:15:22,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:22,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:15:22,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:22,537 INFO L87 Difference]: Start difference. First operand 12015 states and 31806 transitions. Second operand has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:22,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:22,842 INFO L93 Difference]: Finished difference Result 13804 states and 35062 transitions. [2021-07-09 17:15:22,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:15:22,842 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-07-09 17:15:22,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:22,867 INFO L225 Difference]: With dead ends: 13804 [2021-07-09 17:15:22,867 INFO L226 Difference]: Without dead ends: 13739 [2021-07-09 17:15:22,867 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 185.3ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:15:22,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13739 states. [2021-07-09 17:15:23,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13739 to 12024. [2021-07-09 17:15:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12024 states, 12023 states have (on average 2.646594028112784) internal successors, (31820), 12023 states have internal predecessors, (31820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12024 states to 12024 states and 31820 transitions. [2021-07-09 17:15:23,172 INFO L78 Accepts]: Start accepts. Automaton has 12024 states and 31820 transitions. Word has length 53 [2021-07-09 17:15:23,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:23,173 INFO L482 AbstractCegarLoop]: Abstraction has 12024 states and 31820 transitions. [2021-07-09 17:15:23,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.1176470588235294) internal successors, (53), 16 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:23,173 INFO L276 IsEmpty]: Start isEmpty. Operand 12024 states and 31820 transitions. [2021-07-09 17:15:23,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:15:23,184 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:23,184 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:23,400 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-07-09 17:15:23,401 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:23,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:23,401 INFO L82 PathProgramCache]: Analyzing trace with hash -278189192, now seen corresponding path program 236 times [2021-07-09 17:15:23,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:23,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677401161] [2021-07-09 17:15:23,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:23,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:23,520 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:23,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:23,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677401161] [2021-07-09 17:15:23,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677401161] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:23,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495115159] [2021-07-09 17:15:23,521 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 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:23,549 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:23,549 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:23,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:15:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:23,893 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 70 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:23,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495115159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:23,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:23,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 17] total 25 [2021-07-09 17:15:23,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317390247] [2021-07-09 17:15:23,894 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:15:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:23,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:15:23,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=545, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:15:23,894 INFO L87 Difference]: Start difference. First operand 12024 states and 31820 transitions. Second operand has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:25,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:25,356 INFO L93 Difference]: Finished difference Result 15072 states and 37802 transitions. [2021-07-09 17:15:25,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-07-09 17:15:25,356 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:15:25,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:25,386 INFO L225 Difference]: With dead ends: 15072 [2021-07-09 17:15:25,386 INFO L226 Difference]: Without dead ends: 15028 [2021-07-09 17:15:25,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 860.8ms TimeCoverageRelationStatistics Valid=786, Invalid=3246, Unknown=0, NotChecked=0, Total=4032 [2021-07-09 17:15:25,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15028 states. [2021-07-09 17:15:25,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15028 to 12811. [2021-07-09 17:15:25,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12811 states, 12810 states have (on average 2.609992193598751) internal successors, (33434), 12810 states have internal predecessors, (33434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:25,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12811 states to 12811 states and 33434 transitions. [2021-07-09 17:15:25,662 INFO L78 Accepts]: Start accepts. Automaton has 12811 states and 33434 transitions. Word has length 56 [2021-07-09 17:15:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:25,662 INFO L482 AbstractCegarLoop]: Abstraction has 12811 states and 33434 transitions. [2021-07-09 17:15:25,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 4.269230769230769) internal successors, (111), 25 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:25,663 INFO L276 IsEmpty]: Start isEmpty. Operand 12811 states and 33434 transitions. [2021-07-09 17:15:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:15:25,673 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:25,673 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:25,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-07-09 17:15:25,889 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:25,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:25,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1678028872, now seen corresponding path program 237 times [2021-07-09 17:15:25,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:25,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832075974] [2021-07-09 17:15:25,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:25,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:25,954 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:15:25,954 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:25,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832075974] [2021-07-09 17:15:25,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832075974] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:25,954 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034087956] [2021-07-09 17:15:25,954 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 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:25,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:15:25,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:25,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:15:25,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:26,212 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 62 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:26,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034087956] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:26,213 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:26,213 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-09 17:15:26,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932887790] [2021-07-09 17:15:26,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:15:26,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:26,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:15:26,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:26,213 INFO L87 Difference]: Start difference. First operand 12811 states and 33434 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:27,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:27,256 INFO L93 Difference]: Finished difference Result 16926 states and 41264 transitions. [2021-07-09 17:15:27,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:15:27,257 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:15:27,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:27,291 INFO L225 Difference]: With dead ends: 16926 [2021-07-09 17:15:27,291 INFO L226 Difference]: Without dead ends: 16834 [2021-07-09 17:15:27,292 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 457.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:15:27,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16834 states. [2021-07-09 17:15:27,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16834 to 12990. [2021-07-09 17:15:27,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12990 states, 12989 states have (on average 2.6092847794287475) internal successors, (33892), 12989 states have internal predecessors, (33892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:27,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12990 states to 12990 states and 33892 transitions. [2021-07-09 17:15:27,548 INFO L78 Accepts]: Start accepts. Automaton has 12990 states and 33892 transitions. Word has length 56 [2021-07-09 17:15:27,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:27,548 INFO L482 AbstractCegarLoop]: Abstraction has 12990 states and 33892 transitions. [2021-07-09 17:15:27,548 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:27,548 INFO L276 IsEmpty]: Start isEmpty. Operand 12990 states and 33892 transitions. [2021-07-09 17:15:27,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:15:27,559 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:27,559 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:27,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-07-09 17:15:27,773 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:27,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:27,773 INFO L82 PathProgramCache]: Analyzing trace with hash 173585170, now seen corresponding path program 238 times [2021-07-09 17:15:27,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:27,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309617069] [2021-07-09 17:15:27,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:27,834 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:15:27,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:27,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309617069] [2021-07-09 17:15:27,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309617069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:27,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537492840] [2021-07-09 17:15:27,834 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 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:27,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:27,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:27,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:15:27,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:15:27,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537492840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:27,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:27,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:15:27,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143833996] [2021-07-09 17:15:27,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:15:27,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:27,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:15:27,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:15:27,928 INFO L87 Difference]: Start difference. First operand 12990 states and 33892 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:28,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:28,314 INFO L93 Difference]: Finished difference Result 14078 states and 35927 transitions. [2021-07-09 17:15:28,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:15:28,314 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:15:28,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:28,342 INFO L225 Difference]: With dead ends: 14078 [2021-07-09 17:15:28,342 INFO L226 Difference]: Without dead ends: 14012 [2021-07-09 17:15:28,342 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 49.1ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:15:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14012 states. [2021-07-09 17:15:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14012 to 13057. [2021-07-09 17:15:28,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13057 states, 13056 states have (on average 2.604549632352941) internal successors, (34005), 13056 states have internal predecessors, (34005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:28,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13057 states to 13057 states and 34005 transitions. [2021-07-09 17:15:28,604 INFO L78 Accepts]: Start accepts. Automaton has 13057 states and 34005 transitions. Word has length 56 [2021-07-09 17:15:28,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:28,604 INFO L482 AbstractCegarLoop]: Abstraction has 13057 states and 34005 transitions. [2021-07-09 17:15:28,605 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:28,605 INFO L276 IsEmpty]: Start isEmpty. Operand 13057 states and 34005 transitions. [2021-07-09 17:15:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:15:28,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:28,617 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:28,833 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-07-09 17:15:28,833 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:28,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:28,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1342527864, now seen corresponding path program 239 times [2021-07-09 17:15:28,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:28,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781275022] [2021-07-09 17:15:28,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:28,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:28,899 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:15:28,900 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:28,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781275022] [2021-07-09 17:15:28,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781275022] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:28,900 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893546115] [2021-07-09 17:15:28,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:28,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 17:15:28,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:28,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:15:28,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:29,004 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:15:29,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893546115] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:29,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:29,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:15:29,005 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597437562] [2021-07-09 17:15:29,005 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:15:29,005 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:29,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:15:29,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:15:29,005 INFO L87 Difference]: Start difference. First operand 13057 states and 34005 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:29,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:29,371 INFO L93 Difference]: Finished difference Result 14112 states and 36011 transitions. [2021-07-09 17:15:29,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:15:29,372 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:15:29,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:29,400 INFO L225 Difference]: With dead ends: 14112 [2021-07-09 17:15:29,400 INFO L226 Difference]: Without dead ends: 14074 [2021-07-09 17:15:29,400 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:15:29,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14074 states. [2021-07-09 17:15:29,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14074 to 13111. [2021-07-09 17:15:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13111 states, 13110 states have (on average 2.6011441647597255) internal successors, (34101), 13110 states have internal predecessors, (34101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:29,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13111 states to 13111 states and 34101 transitions. [2021-07-09 17:15:29,652 INFO L78 Accepts]: Start accepts. Automaton has 13111 states and 34101 transitions. Word has length 56 [2021-07-09 17:15:29,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:29,653 INFO L482 AbstractCegarLoop]: Abstraction has 13111 states and 34101 transitions. [2021-07-09 17:15:29,653 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:29,653 INFO L276 IsEmpty]: Start isEmpty. Operand 13111 states and 34101 transitions. [2021-07-09 17:15:29,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:15:29,666 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:29,666 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:29,882 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable843,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:29,882 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:29,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:29,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1719488850, now seen corresponding path program 240 times [2021-07-09 17:15:29,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:29,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873067302] [2021-07-09 17:15:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:29,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:29,947 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:15:29,948 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873067302] [2021-07-09 17:15:29,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873067302] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:29,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269905689] [2021-07-09 17:15:29,948 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 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:29,980 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-09 17:15:29,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:29,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:15:29,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:30,164 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 32 proven. 121 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:30,164 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269905689] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:30,164 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:30,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-09 17:15:30,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485792664] [2021-07-09 17:15:30,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:15:30,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:30,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:15:30,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:30,165 INFO L87 Difference]: Start difference. First operand 13111 states and 34101 transitions. Second operand has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:31,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:31,279 INFO L93 Difference]: Finished difference Result 18611 states and 44534 transitions. [2021-07-09 17:15:31,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:15:31,280 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:15:31,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:31,343 INFO L225 Difference]: With dead ends: 18611 [2021-07-09 17:15:31,343 INFO L226 Difference]: Without dead ends: 18544 [2021-07-09 17:15:31,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 347 ImplicationChecksByTransitivity, 457.2ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:15:31,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18544 states. [2021-07-09 17:15:31,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18544 to 13170. [2021-07-09 17:15:31,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13170 states, 13169 states have (on average 2.5990583947148607) internal successors, (34227), 13169 states have internal predecessors, (34227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:31,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13170 states to 13170 states and 34227 transitions. [2021-07-09 17:15:31,725 INFO L78 Accepts]: Start accepts. Automaton has 13170 states and 34227 transitions. Word has length 56 [2021-07-09 17:15:31,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:31,725 INFO L482 AbstractCegarLoop]: Abstraction has 13170 states and 34227 transitions. [2021-07-09 17:15:31,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.684210526315789) internal successors, (108), 18 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:31,726 INFO L276 IsEmpty]: Start isEmpty. Operand 13170 states and 34227 transitions. [2021-07-09 17:15:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:15:31,738 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:31,738 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:31,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 402 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-07-09 17:15:31,955 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:31,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:31,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1774337938, now seen corresponding path program 241 times [2021-07-09 17:15:31,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:31,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818755915] [2021-07-09 17:15:31,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:31,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:32,018 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:15:32,018 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:32,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818755915] [2021-07-09 17:15:32,018 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818755915] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:32,018 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376654009] [2021-07-09 17:15:32,018 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:32,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:32,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 31 conjunts are in the unsatisfiable core [2021-07-09 17:15:32,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:15:32,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376654009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:32,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:32,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-07-09 17:15:32,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654344404] [2021-07-09 17:15:32,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-09 17:15:32,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:32,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-09 17:15:32,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:15:32,110 INFO L87 Difference]: Start difference. First operand 13170 states and 34227 transitions. Second operand has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:32,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:32,462 INFO L93 Difference]: Finished difference Result 14386 states and 36601 transitions. [2021-07-09 17:15:32,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-09 17:15:32,463 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-07-09 17:15:32,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:32,491 INFO L225 Difference]: With dead ends: 14386 [2021-07-09 17:15:32,491 INFO L226 Difference]: Without dead ends: 14350 [2021-07-09 17:15:32,491 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2021-07-09 17:15:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14350 states. [2021-07-09 17:15:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14350 to 13369. [2021-07-09 17:15:32,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13369 states, 13368 states have (on average 2.590065828845003) internal successors, (34624), 13368 states have internal predecessors, (34624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:32,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13369 states to 13369 states and 34624 transitions. [2021-07-09 17:15:32,750 INFO L78 Accepts]: Start accepts. Automaton has 13369 states and 34624 transitions. Word has length 56 [2021-07-09 17:15:32,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:32,750 INFO L482 AbstractCegarLoop]: Abstraction has 13369 states and 34624 transitions. [2021-07-09 17:15:32,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.4) internal successors, (54), 9 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:32,750 INFO L276 IsEmpty]: Start isEmpty. Operand 13369 states and 34624 transitions. [2021-07-09 17:15:32,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-07-09 17:15:32,762 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:32,762 INFO L508 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:32,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,403 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:32,979 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:32,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:32,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1948615432, now seen corresponding path program 242 times [2021-07-09 17:15:32,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:32,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852257010] [2021-07-09 17:15:32,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:33,043 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 0 proven. 150 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:15:33,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:33,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852257010] [2021-07-09 17:15:33,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852257010] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:33,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66977628] [2021-07-09 17:15:33,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:33,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:33,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:33,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 19 conjunts are in the unsatisfiable core [2021-07-09 17:15:33,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:33,264 INFO L134 CoverageAnalysis]: Checked inductivity of 155 backedges. 57 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:33,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66977628] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:33,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:33,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-07-09 17:15:33,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053822301] [2021-07-09 17:15:33,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:15:33,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:33,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:15:33,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:33,265 INFO L87 Difference]: Start difference. First operand 13369 states and 34624 transitions. Second operand has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:34,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:34,382 INFO L93 Difference]: Finished difference Result 18830 states and 45148 transitions. [2021-07-09 17:15:34,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-07-09 17:15:34,382 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have 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 [2021-07-09 17:15:34,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:34,413 INFO L225 Difference]: With dead ends: 18830 [2021-07-09 17:15:34,413 INFO L226 Difference]: Without dead ends: 18792 [2021-07-09 17:15:34,413 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 479.0ms TimeCoverageRelationStatistics Valid=323, Invalid=1483, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:15:34,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18792 states. [2021-07-09 17:15:34,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18792 to 14037. [2021-07-09 17:15:34,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14037 states, 14036 states have (on average 2.5893416927899686) internal successors, (36344), 14036 states have internal predecessors, (36344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:34,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14037 states to 14037 states and 36344 transitions. [2021-07-09 17:15:34,825 INFO L78 Accepts]: Start accepts. Automaton has 14037 states and 36344 transitions. Word has length 56 [2021-07-09 17:15:34,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:34,825 INFO L482 AbstractCegarLoop]: Abstraction has 14037 states and 36344 transitions. [2021-07-09 17:15:34,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 5.7894736842105265) internal successors, (110), 18 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:34,825 INFO L276 IsEmpty]: Start isEmpty. Operand 14037 states and 36344 transitions. [2021-07-09 17:15:34,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:34,838 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:34,838 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:35,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,404 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:35,040 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:35,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:35,040 INFO L82 PathProgramCache]: Analyzing trace with hash -848422539, now seen corresponding path program 112 times [2021-07-09 17:15:35,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:35,040 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486423323] [2021-07-09 17:15:35,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:35,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:35,220 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:35,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:35,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486423323] [2021-07-09 17:15:35,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486423323] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:35,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233123138] [2021-07-09 17:15:35,220 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 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:35,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:35,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:15:35,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:35,341 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:35,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1233123138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:35,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:35,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-07-09 17:15:35,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426897130] [2021-07-09 17:15:35,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:15:35,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:35,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:15:35,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:35,342 INFO L87 Difference]: Start difference. First operand 14037 states and 36344 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:36,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:36,480 INFO L93 Difference]: Finished difference Result 17404 states and 43003 transitions. [2021-07-09 17:15:36,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:15:36,481 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:36,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:36,507 INFO L225 Difference]: With dead ends: 17404 [2021-07-09 17:15:36,507 INFO L226 Difference]: Without dead ends: 17123 [2021-07-09 17:15:36,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:15:36,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17123 states. [2021-07-09 17:15:36,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17123 to 13513. [2021-07-09 17:15:36,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13513 states, 13512 states have (on average 2.5924363528715215) internal successors, (35029), 13512 states have internal predecessors, (35029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:36,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 35029 transitions. [2021-07-09 17:15:36,744 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 35029 transitions. Word has length 59 [2021-07-09 17:15:36,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:36,744 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 35029 transitions. [2021-07-09 17:15:36,744 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:36,744 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 35029 transitions. [2021-07-09 17:15:36,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:36,758 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:36,758 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:36,979 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-07-09 17:15:36,979 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:36,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:36,979 INFO L82 PathProgramCache]: Analyzing trace with hash 917417269, now seen corresponding path program 243 times [2021-07-09 17:15:36,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:36,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424500934] [2021-07-09 17:15:36,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:36,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:37,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:37,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424500934] [2021-07-09 17:15:37,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424500934] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:37,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496812813] [2021-07-09 17:15:37,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:37,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:15:37,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:37,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:15:37,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:37,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496812813] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:37,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:37,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-07-09 17:15:37,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395356899] [2021-07-09 17:15:37,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:15:37,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:37,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:15:37,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:15:37,575 INFO L87 Difference]: Start difference. First operand 13513 states and 35029 transitions. Second operand has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:38,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:38,796 INFO L93 Difference]: Finished difference Result 13861 states and 35583 transitions. [2021-07-09 17:15:38,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:38,796 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:38,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:38,822 INFO L225 Difference]: With dead ends: 13861 [2021-07-09 17:15:38,822 INFO L226 Difference]: Without dead ends: 13757 [2021-07-09 17:15:38,822 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=65, Invalid=585, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:15:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13757 states. [2021-07-09 17:15:39,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13757 to 13513. [2021-07-09 17:15:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13513 states, 13512 states have (on average 2.5887359384251036) internal successors, (34979), 13512 states have internal predecessors, (34979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:39,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13513 states to 13513 states and 34979 transitions. [2021-07-09 17:15:39,073 INFO L78 Accepts]: Start accepts. Automaton has 13513 states and 34979 transitions. Word has length 59 [2021-07-09 17:15:39,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:39,073 INFO L482 AbstractCegarLoop]: Abstraction has 13513 states and 34979 transitions. [2021-07-09 17:15:39,073 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.269230769230769) internal successors, (85), 25 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:39,073 INFO L276 IsEmpty]: Start isEmpty. Operand 13513 states and 34979 transitions. [2021-07-09 17:15:39,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:39,086 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:39,086 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:39,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,406 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:39,288 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:39,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:39,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1852033535, now seen corresponding path program 244 times [2021-07-09 17:15:39,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:39,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255483896] [2021-07-09 17:15:39,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:39,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:39,388 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:39,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:39,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255483896] [2021-07-09 17:15:39,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [255483896] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:39,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979851898] [2021-07-09 17:15:39,388 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 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:39,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:39,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:39,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:15:39,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:39,500 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:39,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979851898] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:39,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:39,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:15:39,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054996833] [2021-07-09 17:15:39,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:39,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:39,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:39,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:39,501 INFO L87 Difference]: Start difference. First operand 13513 states and 34979 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:40,019 INFO L93 Difference]: Finished difference Result 14176 states and 36253 transitions. [2021-07-09 17:15:40,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:40,020 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:40,043 INFO L225 Difference]: With dead ends: 14176 [2021-07-09 17:15:40,044 INFO L226 Difference]: Without dead ends: 14176 [2021-07-09 17:15:40,044 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 163.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:40,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14176 states. [2021-07-09 17:15:40,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14176 to 13534. [2021-07-09 17:15:40,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13534 states, 13533 states have (on average 2.589448015960984) internal successors, (35043), 13533 states have internal predecessors, (35043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:40,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13534 states to 13534 states and 35043 transitions. [2021-07-09 17:15:40,286 INFO L78 Accepts]: Start accepts. Automaton has 13534 states and 35043 transitions. Word has length 59 [2021-07-09 17:15:40,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:40,286 INFO L482 AbstractCegarLoop]: Abstraction has 13534 states and 35043 transitions. [2021-07-09 17:15:40,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:40,286 INFO L276 IsEmpty]: Start isEmpty. Operand 13534 states and 35043 transitions. [2021-07-09 17:15:40,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:40,298 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:40,298 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:40,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,407 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:40,513 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:40,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:40,513 INFO L82 PathProgramCache]: Analyzing trace with hash -267823288, now seen corresponding path program 113 times [2021-07-09 17:15:40,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:40,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52226019] [2021-07-09 17:15:40,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:40,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:40,589 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 102 proven. 76 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:40,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:40,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52226019] [2021-07-09 17:15:40,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52226019] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:40,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156232598] [2021-07-09 17:15:40,590 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 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:40,626 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:15:40,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:40,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:15:40,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:40,738 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 76 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:40,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156232598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:40,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:40,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-09 17:15:40,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371602908] [2021-07-09 17:15:40,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:15:40,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:40,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:15:40,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:40,739 INFO L87 Difference]: Start difference. First operand 13534 states and 35043 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:41,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:41,032 INFO L93 Difference]: Finished difference Result 19967 states and 49349 transitions. [2021-07-09 17:15:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:15:41,032 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:41,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:41,075 INFO L225 Difference]: With dead ends: 19967 [2021-07-09 17:15:41,075 INFO L226 Difference]: Without dead ends: 19967 [2021-07-09 17:15:41,075 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 97.9ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:15:41,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19967 states. [2021-07-09 17:15:41,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19967 to 14829. [2021-07-09 17:15:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14829 states, 14828 states have (on average 2.625573239816563) internal successors, (38932), 14828 states have internal predecessors, (38932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:41,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14829 states to 14829 states and 38932 transitions. [2021-07-09 17:15:41,411 INFO L78 Accepts]: Start accepts. Automaton has 14829 states and 38932 transitions. Word has length 59 [2021-07-09 17:15:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:41,411 INFO L482 AbstractCegarLoop]: Abstraction has 14829 states and 38932 transitions. [2021-07-09 17:15:41,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:41,412 INFO L276 IsEmpty]: Start isEmpty. Operand 14829 states and 38932 transitions. [2021-07-09 17:15:41,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:41,427 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:41,427 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:41,641 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable850,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:41,641 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:41,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:41,641 INFO L82 PathProgramCache]: Analyzing trace with hash -801688664, now seen corresponding path program 245 times [2021-07-09 17:15:41,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:41,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925809561] [2021-07-09 17:15:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:41,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 87 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:41,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925809561] [2021-07-09 17:15:41,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925809561] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:41,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [302672028] [2021-07-09 17:15:41,716 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 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:41,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:15:41,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:41,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:15:41,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:41,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [302672028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:41,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:41,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 19 [2021-07-09 17:15:41,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065903006] [2021-07-09 17:15:41,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:15:41,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:41,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:15:41,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=250, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:15:41,907 INFO L87 Difference]: Start difference. First operand 14829 states and 38932 transitions. Second operand has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:42,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:42,293 INFO L93 Difference]: Finished difference Result 15741 states and 40619 transitions. [2021-07-09 17:15:42,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:42,293 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:42,324 INFO L225 Difference]: With dead ends: 15741 [2021-07-09 17:15:42,324 INFO L226 Difference]: Without dead ends: 15735 [2021-07-09 17:15:42,324 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 118.5ms TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:15:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15735 states. [2021-07-09 17:15:42,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15735 to 14730. [2021-07-09 17:15:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14730 states, 14729 states have (on average 2.6223776223776225) internal successors, (38625), 14729 states have internal predecessors, (38625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:42,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 38625 transitions. [2021-07-09 17:15:42,631 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 38625 transitions. Word has length 59 [2021-07-09 17:15:42,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:42,632 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 38625 transitions. [2021-07-09 17:15:42,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 4.5) internal successors, (90), 19 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:42,632 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 38625 transitions. [2021-07-09 17:15:42,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:42,646 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:42,646 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:42,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable851 [2021-07-09 17:15:42,846 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:42,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:42,847 INFO L82 PathProgramCache]: Analyzing trace with hash 925621557, now seen corresponding path program 114 times [2021-07-09 17:15:42,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:42,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864346157] [2021-07-09 17:15:42,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:42,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:42,966 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:42,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864346157] [2021-07-09 17:15:42,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864346157] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:42,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153880766] [2021-07-09 17:15:42,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:43,010 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:15:43,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:43,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:15:43,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:43,099 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:43,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153880766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:43,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:43,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:15:43,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698345242] [2021-07-09 17:15:43,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:43,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:43,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:43,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:43,100 INFO L87 Difference]: Start difference. First operand 14730 states and 38625 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:43,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:43,637 INFO L93 Difference]: Finished difference Result 16762 states and 42638 transitions. [2021-07-09 17:15:43,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:43,637 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:43,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:43,677 INFO L225 Difference]: With dead ends: 16762 [2021-07-09 17:15:43,677 INFO L226 Difference]: Without dead ends: 16710 [2021-07-09 17:15:43,677 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 175.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:43,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16710 states. [2021-07-09 17:15:43,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16710 to 14900. [2021-07-09 17:15:43,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14900 states, 14899 states have (on average 2.6196389019397275) internal successors, (39030), 14899 states have internal predecessors, (39030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:43,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14900 states to 14900 states and 39030 transitions. [2021-07-09 17:15:43,981 INFO L78 Accepts]: Start accepts. Automaton has 14900 states and 39030 transitions. Word has length 59 [2021-07-09 17:15:43,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:43,981 INFO L482 AbstractCegarLoop]: Abstraction has 14900 states and 39030 transitions. [2021-07-09 17:15:43,981 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:43,981 INFO L276 IsEmpty]: Start isEmpty. Operand 14900 states and 39030 transitions. [2021-07-09 17:15:43,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:43,994 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:43,994 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:44,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable854 [2021-07-09 17:15:44,210 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:44,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:44,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1869012747, now seen corresponding path program 246 times [2021-07-09 17:15:44,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:44,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823700372] [2021-07-09 17:15:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:44,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:44,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823700372] [2021-07-09 17:15:44,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823700372] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:44,296 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637529782] [2021-07-09 17:15:44,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:44,326 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:15:44,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:44,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:15:44,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:44,423 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:44,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637529782] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:44,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:44,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:15:44,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484999415] [2021-07-09 17:15:44,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:44,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:44,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:44,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:44,424 INFO L87 Difference]: Start difference. First operand 14900 states and 39030 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:45,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:45,181 INFO L93 Difference]: Finished difference Result 15921 states and 40869 transitions. [2021-07-09 17:15:45,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:45,182 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:45,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:45,210 INFO L225 Difference]: With dead ends: 15921 [2021-07-09 17:15:45,210 INFO L226 Difference]: Without dead ends: 15883 [2021-07-09 17:15:45,210 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 147.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15883 states. [2021-07-09 17:15:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15883 to 14906. [2021-07-09 17:15:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14906 states, 14905 states have (on average 2.617309627641731) internal successors, (39011), 14905 states have internal predecessors, (39011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14906 states to 14906 states and 39011 transitions. [2021-07-09 17:15:45,511 INFO L78 Accepts]: Start accepts. Automaton has 14906 states and 39011 transitions. Word has length 59 [2021-07-09 17:15:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:45,511 INFO L482 AbstractCegarLoop]: Abstraction has 14906 states and 39011 transitions. [2021-07-09 17:15:45,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 14906 states and 39011 transitions. [2021-07-09 17:15:45,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:45,525 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:45,525 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:45,740 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 411 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable855 [2021-07-09 17:15:45,741 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:45,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:45,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1812418369, now seen corresponding path program 247 times [2021-07-09 17:15:45,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:45,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120697154] [2021-07-09 17:15:45,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:45,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:46,004 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:15:46,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:46,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120697154] [2021-07-09 17:15:46,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120697154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:46,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763732696] [2021-07-09 17:15:46,005 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 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:46,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:46,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:15:46,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:46,123 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:15:46,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763732696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:46,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:46,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:15:46,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18647369] [2021-07-09 17:15:46,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:46,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:46,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:46,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:46,124 INFO L87 Difference]: Start difference. First operand 14906 states and 39011 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:46,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:46,768 INFO L93 Difference]: Finished difference Result 16341 states and 41812 transitions. [2021-07-09 17:15:46,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:46,769 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:46,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:46,806 INFO L225 Difference]: With dead ends: 16341 [2021-07-09 17:15:46,806 INFO L226 Difference]: Without dead ends: 16329 [2021-07-09 17:15:46,807 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 316.8ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:46,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16329 states. [2021-07-09 17:15:47,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16329 to 14918. [2021-07-09 17:15:47,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14918 states, 14917 states have (on average 2.61661191928672) internal successors, (39032), 14917 states have internal predecessors, (39032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:47,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14918 states to 14918 states and 39032 transitions. [2021-07-09 17:15:47,116 INFO L78 Accepts]: Start accepts. Automaton has 14918 states and 39032 transitions. Word has length 59 [2021-07-09 17:15:47,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:47,116 INFO L482 AbstractCegarLoop]: Abstraction has 14918 states and 39032 transitions. [2021-07-09 17:15:47,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:47,116 INFO L276 IsEmpty]: Start isEmpty. Operand 14918 states and 39032 transitions. [2021-07-09 17:15:47,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:47,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:47,131 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:47,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable856 [2021-07-09 17:15:47,348 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:47,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:47,348 INFO L82 PathProgramCache]: Analyzing trace with hash 164060866, now seen corresponding path program 248 times [2021-07-09 17:15:47,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:47,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990038282] [2021-07-09 17:15:47,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:47,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:47,432 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:47,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:47,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990038282] [2021-07-09 17:15:47,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990038282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:47,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [95712117] [2021-07-09 17:15:47,433 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 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:47,465 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:47,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:47,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:15:47,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:47,548 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 96 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:47,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [95712117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:47,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:47,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:15:47,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330694120] [2021-07-09 17:15:47,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:47,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:47,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:47,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:47,549 INFO L87 Difference]: Start difference. First operand 14918 states and 39032 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:47,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:47,827 INFO L93 Difference]: Finished difference Result 16558 states and 41906 transitions. [2021-07-09 17:15:47,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:47,827 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:47,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:47,858 INFO L225 Difference]: With dead ends: 16558 [2021-07-09 17:15:47,858 INFO L226 Difference]: Without dead ends: 16534 [2021-07-09 17:15:47,858 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 96.9ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:15:47,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16534 states. [2021-07-09 17:15:48,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16534 to 14871. [2021-07-09 17:15:48,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14871 states, 14870 states have (on average 2.6131136516476126) internal successors, (38857), 14870 states have internal predecessors, (38857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:48,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14871 states to 14871 states and 38857 transitions. [2021-07-09 17:15:48,206 INFO L78 Accepts]: Start accepts. Automaton has 14871 states and 38857 transitions. Word has length 59 [2021-07-09 17:15:48,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:48,206 INFO L482 AbstractCegarLoop]: Abstraction has 14871 states and 38857 transitions. [2021-07-09 17:15:48,206 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:48,206 INFO L276 IsEmpty]: Start isEmpty. Operand 14871 states and 38857 transitions. [2021-07-09 17:15:48,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:48,220 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:48,221 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:48,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable857,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:48,437 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:48,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:48,437 INFO L82 PathProgramCache]: Analyzing trace with hash -340631593, now seen corresponding path program 249 times [2021-07-09 17:15:48,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:48,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204212459] [2021-07-09 17:15:48,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:48,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:48,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:48,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204212459] [2021-07-09 17:15:48,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204212459] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:48,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216411132] [2021-07-09 17:15:48,534 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 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:48,566 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 17:15:48,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:48,567 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:15:48,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:48,651 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:48,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216411132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:48,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:48,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:15:48,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333660427] [2021-07-09 17:15:48,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:48,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:48,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:48,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:48,652 INFO L87 Difference]: Start difference. First operand 14871 states and 38857 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:49,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:49,429 INFO L93 Difference]: Finished difference Result 17148 states and 43479 transitions. [2021-07-09 17:15:49,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:15:49,430 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:49,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:49,463 INFO L225 Difference]: With dead ends: 17148 [2021-07-09 17:15:49,464 INFO L226 Difference]: Without dead ends: 17136 [2021-07-09 17:15:49,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 193.3ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:15:49,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17136 states. [2021-07-09 17:15:49,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17136 to 14915. [2021-07-09 17:15:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14915 states, 14914 states have (on average 2.6129140404988602) internal successors, (38969), 14914 states have internal predecessors, (38969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:49,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14915 states to 14915 states and 38969 transitions. [2021-07-09 17:15:49,775 INFO L78 Accepts]: Start accepts. Automaton has 14915 states and 38969 transitions. Word has length 59 [2021-07-09 17:15:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:49,775 INFO L482 AbstractCegarLoop]: Abstraction has 14915 states and 38969 transitions. [2021-07-09 17:15:49,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 14915 states and 38969 transitions. [2021-07-09 17:15:49,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:49,788 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:49,788 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:50,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable860 [2021-07-09 17:15:50,004 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:50,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:50,005 INFO L82 PathProgramCache]: Analyzing trace with hash -578693110, now seen corresponding path program 115 times [2021-07-09 17:15:50,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:50,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247655809] [2021-07-09 17:15:50,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:50,074 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:50,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:50,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247655809] [2021-07-09 17:15:50,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247655809] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:50,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809653189] [2021-07-09 17:15:50,075 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 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:50,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:50,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:15:50,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:50,189 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:50,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809653189] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:50,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:50,190 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:15:50,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943439537] [2021-07-09 17:15:50,190 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:50,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:50,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:50,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:50,190 INFO L87 Difference]: Start difference. First operand 14915 states and 38969 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:50,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:50,427 INFO L93 Difference]: Finished difference Result 19459 states and 48107 transitions. [2021-07-09 17:15:50,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:50,428 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:50,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:50,471 INFO L225 Difference]: With dead ends: 19459 [2021-07-09 17:15:50,471 INFO L226 Difference]: Without dead ends: 19451 [2021-07-09 17:15:50,471 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:50,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19451 states. [2021-07-09 17:15:50,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19451 to 15127. [2021-07-09 17:15:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15127 states, 15126 states have (on average 2.619264841993918) internal successors, (39619), 15126 states have internal predecessors, (39619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:50,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15127 states to 15127 states and 39619 transitions. [2021-07-09 17:15:50,819 INFO L78 Accepts]: Start accepts. Automaton has 15127 states and 39619 transitions. Word has length 59 [2021-07-09 17:15:50,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:50,819 INFO L482 AbstractCegarLoop]: Abstraction has 15127 states and 39619 transitions. [2021-07-09 17:15:50,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:50,819 INFO L276 IsEmpty]: Start isEmpty. Operand 15127 states and 39619 transitions. [2021-07-09 17:15:50,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:50,835 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:50,835 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:51,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 415 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-07-09 17:15:51,051 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:51,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:51,051 INFO L82 PathProgramCache]: Analyzing trace with hash -1200573520, now seen corresponding path program 116 times [2021-07-09 17:15:51,051 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:51,051 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569970717] [2021-07-09 17:15:51,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:51,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:51,119 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 69 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:15:51,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569970717] [2021-07-09 17:15:51,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569970717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:51,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790733933] [2021-07-09 17:15:51,120 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 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:51,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:51,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:51,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:15:51,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:51,239 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 69 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:51,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790733933] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:51,239 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:51,239 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:15:51,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477429417] [2021-07-09 17:15:51,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:51,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:51,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:51,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=94, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:51,240 INFO L87 Difference]: Start difference. First operand 15127 states and 39619 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:51,495 INFO L93 Difference]: Finished difference Result 21539 states and 52894 transitions. [2021-07-09 17:15:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:51,495 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:51,533 INFO L225 Difference]: With dead ends: 21539 [2021-07-09 17:15:51,533 INFO L226 Difference]: Without dead ends: 21539 [2021-07-09 17:15:51,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=88, Invalid=122, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:51,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21539 states. [2021-07-09 17:15:51,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21539 to 15133. [2021-07-09 17:15:51,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15133 states, 15132 states have (on average 2.6190192968543484) internal successors, (39631), 15132 states have internal predecessors, (39631), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:51,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15133 states to 15133 states and 39631 transitions. [2021-07-09 17:15:51,891 INFO L78 Accepts]: Start accepts. Automaton has 15133 states and 39631 transitions. Word has length 59 [2021-07-09 17:15:51,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:51,891 INFO L482 AbstractCegarLoop]: Abstraction has 15133 states and 39631 transitions. [2021-07-09 17:15:51,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:51,891 INFO L276 IsEmpty]: Start isEmpty. Operand 15133 states and 39631 transitions. [2021-07-09 17:15:51,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:51,905 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:51,905 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:52,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:52,122 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:52,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:52,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1456821320, now seen corresponding path program 117 times [2021-07-09 17:15:52,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:52,122 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185115381] [2021-07-09 17:15:52,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:52,211 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 75 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:52,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:52,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185115381] [2021-07-09 17:15:52,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185115381] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:52,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026164806] [2021-07-09 17:15:52,212 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 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:52,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:15:52,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:52,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:15:52,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:52,354 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:15:52,354 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026164806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:52,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:52,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:15:52,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034157723] [2021-07-09 17:15:52,355 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:15:52,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:52,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:15:52,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:15:52,355 INFO L87 Difference]: Start difference. First operand 15133 states and 39631 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:52,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:52,602 INFO L93 Difference]: Finished difference Result 19875 states and 49164 transitions. [2021-07-09 17:15:52,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:52,602 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:52,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:52,636 INFO L225 Difference]: With dead ends: 19875 [2021-07-09 17:15:52,637 INFO L226 Difference]: Without dead ends: 19875 [2021-07-09 17:15:52,637 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=107, Invalid=165, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:52,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19875 states. [2021-07-09 17:15:52,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19875 to 14798. [2021-07-09 17:15:52,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14798 states, 14797 states have (on average 2.6091099547205516) internal successors, (38607), 14797 states have internal predecessors, (38607), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38607 transitions. [2021-07-09 17:15:52,901 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38607 transitions. Word has length 59 [2021-07-09 17:15:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:52,901 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38607 transitions. [2021-07-09 17:15:52,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38607 transitions. [2021-07-09 17:15:52,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:52,914 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:52,914 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:53,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 417 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable864 [2021-07-09 17:15:53,114 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:53,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:53,114 INFO L82 PathProgramCache]: Analyzing trace with hash 1191927516, now seen corresponding path program 250 times [2021-07-09 17:15:53,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:53,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680476069] [2021-07-09 17:15:53,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:53,249 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:53,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:53,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680476069] [2021-07-09 17:15:53,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680476069] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:53,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586580249] [2021-07-09 17:15:53,249 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:53,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:53,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:53,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:15:53,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:53,484 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 81 proven. 97 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:53,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586580249] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:53,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:53,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:15:53,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226172959] [2021-07-09 17:15:53,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:15:53,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:53,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:15:53,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:15:53,485 INFO L87 Difference]: Start difference. First operand 14798 states and 38607 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:53,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:53,743 INFO L93 Difference]: Finished difference Result 16237 states and 41157 transitions. [2021-07-09 17:15:53,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:15:53,743 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:53,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:53,768 INFO L225 Difference]: With dead ends: 16237 [2021-07-09 17:15:53,768 INFO L226 Difference]: Without dead ends: 16219 [2021-07-09 17:15:53,768 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:53,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16219 states. [2021-07-09 17:15:53,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16219 to 14798. [2021-07-09 17:15:53,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14798 states, 14797 states have (on average 2.608298979522876) internal successors, (38595), 14797 states have internal predecessors, (38595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:54,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14798 states to 14798 states and 38595 transitions. [2021-07-09 17:15:54,005 INFO L78 Accepts]: Start accepts. Automaton has 14798 states and 38595 transitions. Word has length 59 [2021-07-09 17:15:54,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:54,005 INFO L482 AbstractCegarLoop]: Abstraction has 14798 states and 38595 transitions. [2021-07-09 17:15:54,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:54,005 INFO L276 IsEmpty]: Start isEmpty. Operand 14798 states and 38595 transitions. [2021-07-09 17:15:54,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:54,019 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:54,019 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:54,235 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable865,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:54,235 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:54,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:54,235 INFO L82 PathProgramCache]: Analyzing trace with hash 2094564251, now seen corresponding path program 118 times [2021-07-09 17:15:54,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:54,235 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205921160] [2021-07-09 17:15:54,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:54,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:54,355 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:54,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:54,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205921160] [2021-07-09 17:15:54,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205921160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:54,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096104111] [2021-07-09 17:15:54,356 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 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:54,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:15:54,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:54,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:15:54,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:54,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1096104111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:54,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:54,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:15:54,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914771171] [2021-07-09 17:15:54,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:54,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:54,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:54,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:54,474 INFO L87 Difference]: Start difference. First operand 14798 states and 38595 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:55,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:55,015 INFO L93 Difference]: Finished difference Result 16875 states and 42676 transitions. [2021-07-09 17:15:55,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:55,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:55,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:55,042 INFO L225 Difference]: With dead ends: 16875 [2021-07-09 17:15:55,042 INFO L226 Difference]: Without dead ends: 16832 [2021-07-09 17:15:55,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:55,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16832 states. [2021-07-09 17:15:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16832 to 14910. [2021-07-09 17:15:55,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14910 states, 14909 states have (on average 2.608357368032732) internal successors, (38888), 14909 states have internal predecessors, (38888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:55,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14910 states to 14910 states and 38888 transitions. [2021-07-09 17:15:55,315 INFO L78 Accepts]: Start accepts. Automaton has 14910 states and 38888 transitions. Word has length 59 [2021-07-09 17:15:55,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:55,316 INFO L482 AbstractCegarLoop]: Abstraction has 14910 states and 38888 transitions. [2021-07-09 17:15:55,316 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:55,316 INFO L276 IsEmpty]: Start isEmpty. Operand 14910 states and 38888 transitions. [2021-07-09 17:15:55,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:55,328 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:55,328 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:55,542 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-07-09 17:15:55,542 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:55,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:55,542 INFO L82 PathProgramCache]: Analyzing trace with hash 540867394, now seen corresponding path program 251 times [2021-07-09 17:15:55,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:55,543 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936764824] [2021-07-09 17:15:55,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:55,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:55,600 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:15:55,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936764824] [2021-07-09 17:15:55,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936764824] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:55,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195596663] [2021-07-09 17:15:55,600 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:55,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:15:55,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:55,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:15:55,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:55,742 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 73 proven. 105 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:15:55,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195596663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:55,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:55,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 16 [2021-07-09 17:15:55,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842633719] [2021-07-09 17:15:55,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:15:55,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:55,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:15:55,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:15:55,743 INFO L87 Difference]: Start difference. First operand 14910 states and 38888 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:56,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:56,013 INFO L93 Difference]: Finished difference Result 17259 states and 43116 transitions. [2021-07-09 17:15:56,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:15:56,014 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:56,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:56,042 INFO L225 Difference]: With dead ends: 17259 [2021-07-09 17:15:56,042 INFO L226 Difference]: Without dead ends: 17256 [2021-07-09 17:15:56,042 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:15:56,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17256 states. [2021-07-09 17:15:56,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17256 to 14884. [2021-07-09 17:15:56,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14884 states, 14883 states have (on average 2.6065309413424713) internal successors, (38793), 14883 states have internal predecessors, (38793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:56,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38793 transitions. [2021-07-09 17:15:56,292 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38793 transitions. Word has length 59 [2021-07-09 17:15:56,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:56,292 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38793 transitions. [2021-07-09 17:15:56,292 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:56,292 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38793 transitions. [2021-07-09 17:15:56,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:56,307 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:56,307 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:56,523 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable870 [2021-07-09 17:15:56,524 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:56,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:56,524 INFO L82 PathProgramCache]: Analyzing trace with hash 747929960, now seen corresponding path program 252 times [2021-07-09 17:15:56,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:56,524 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611254009] [2021-07-09 17:15:56,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:56,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:56,588 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:15:56,589 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:56,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611254009] [2021-07-09 17:15:56,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611254009] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:56,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699232420] [2021-07-09 17:15:56,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:56,620 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:15:56,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:56,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:15:56,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:56,699 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 109 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:15:56,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699232420] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:56,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:56,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:15:56,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29112029] [2021-07-09 17:15:56,700 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:56,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:56,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:56,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:56,700 INFO L87 Difference]: Start difference. First operand 14884 states and 38793 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) [2021-07-09 17:15:56,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:56,950 INFO L93 Difference]: Finished difference Result 17001 states and 42513 transitions. [2021-07-09 17:15:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:15:56,950 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:56,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:56,976 INFO L225 Difference]: With dead ends: 17001 [2021-07-09 17:15:56,976 INFO L226 Difference]: Without dead ends: 16983 [2021-07-09 17:15:56,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 74.6ms TimeCoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:15:56,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16983 states. [2021-07-09 17:15:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16983 to 14884. [2021-07-09 17:15:57,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14884 states, 14883 states have (on average 2.605187126251428) internal successors, (38773), 14883 states have internal predecessors, (38773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:57,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14884 states to 14884 states and 38773 transitions. [2021-07-09 17:15:57,217 INFO L78 Accepts]: Start accepts. Automaton has 14884 states and 38773 transitions. Word has length 59 [2021-07-09 17:15:57,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:57,217 INFO L482 AbstractCegarLoop]: Abstraction has 14884 states and 38773 transitions. [2021-07-09 17:15:57,217 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) [2021-07-09 17:15:57,217 INFO L276 IsEmpty]: Start isEmpty. Operand 14884 states and 38773 transitions. [2021-07-09 17:15:57,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:57,230 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:57,230 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:57,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable872 [2021-07-09 17:15:57,445 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:57,446 INFO L82 PathProgramCache]: Analyzing trace with hash -700070053, now seen corresponding path program 253 times [2021-07-09 17:15:57,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:57,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196991328] [2021-07-09 17:15:57,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:57,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:57,533 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:57,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:57,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196991328] [2021-07-09 17:15:57,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196991328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:57,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8023572] [2021-07-09 17:15:57,534 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 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:57,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:57,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:15:57,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:57,656 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:15:57,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8023572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:57,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:57,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:15:57,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678836567] [2021-07-09 17:15:57,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:57,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:57,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:57,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:57,657 INFO L87 Difference]: Start difference. First operand 14884 states and 38773 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:58,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:58,474 INFO L93 Difference]: Finished difference Result 16014 states and 40804 transitions. [2021-07-09 17:15:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:58,475 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:58,496 INFO L225 Difference]: With dead ends: 16014 [2021-07-09 17:15:58,497 INFO L226 Difference]: Without dead ends: 15958 [2021-07-09 17:15:58,497 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 150.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:58,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15958 states. [2021-07-09 17:15:58,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15958 to 14911. [2021-07-09 17:15:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14911 states, 14910 states have (on average 2.602012072434608) internal successors, (38796), 14910 states have internal predecessors, (38796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:58,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14911 states to 14911 states and 38796 transitions. [2021-07-09 17:15:58,717 INFO L78 Accepts]: Start accepts. Automaton has 14911 states and 38796 transitions. Word has length 59 [2021-07-09 17:15:58,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:58,717 INFO L482 AbstractCegarLoop]: Abstraction has 14911 states and 38796 transitions. [2021-07-09 17:15:58,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:58,717 INFO L276 IsEmpty]: Start isEmpty. Operand 14911 states and 38796 transitions. [2021-07-09 17:15:58,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:15:58,730 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:15:58,730 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:15:58,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable875,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:58,946 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:15:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:15:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1313606233, now seen corresponding path program 254 times [2021-07-09 17:15:58,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:15:58,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662613598] [2021-07-09 17:15:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:15:58,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:15:59,038 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:15:59,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:15:59,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662613598] [2021-07-09 17:15:59,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662613598] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:59,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884336215] [2021-07-09 17:15:59,038 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 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:15:59,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:15:59,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:15:59,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:15:59,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:15:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:15:59,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884336215] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:15:59,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:15:59,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:15:59,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757402654] [2021-07-09 17:15:59,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:15:59,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:15:59,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:15:59,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:15:59,152 INFO L87 Difference]: Start difference. First operand 14911 states and 38796 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:59,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:15:59,731 INFO L93 Difference]: Finished difference Result 16567 states and 42026 transitions. [2021-07-09 17:15:59,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:15:59,732 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:15:59,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:15:59,756 INFO L225 Difference]: With dead ends: 16567 [2021-07-09 17:15:59,756 INFO L226 Difference]: Without dead ends: 16555 [2021-07-09 17:15:59,757 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 148.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:15:59,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16555 states. [2021-07-09 17:15:59,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16555 to 14947. [2021-07-09 17:15:59,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14947 states, 14946 states have (on average 2.6009634684865515) internal successors, (38874), 14946 states have internal predecessors, (38874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14947 states to 14947 states and 38874 transitions. [2021-07-09 17:15:59,995 INFO L78 Accepts]: Start accepts. Automaton has 14947 states and 38874 transitions. Word has length 59 [2021-07-09 17:15:59,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:15:59,995 INFO L482 AbstractCegarLoop]: Abstraction has 14947 states and 38874 transitions. [2021-07-09 17:15:59,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:15:59,995 INFO L276 IsEmpty]: Start isEmpty. Operand 14947 states and 38874 transitions. [2021-07-09 17:16:00,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:00,009 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:00,009 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:00,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 423 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable876 [2021-07-09 17:16:00,225 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:00,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:00,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1470905720, now seen corresponding path program 119 times [2021-07-09 17:16:00,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:00,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569118679] [2021-07-09 17:16:00,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:00,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 103 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:00,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:00,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569118679] [2021-07-09 17:16:00,299 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569118679] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:00,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883794244] [2021-07-09 17:16:00,299 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:00,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:16:00,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:00,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:00,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:00,434 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:00,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [883794244] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:00,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:00,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-09 17:16:00,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294479374] [2021-07-09 17:16:00,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:00,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:00,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:00,435 INFO L87 Difference]: Start difference. First operand 14947 states and 38874 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:00,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:00,673 INFO L93 Difference]: Finished difference Result 19543 states and 48102 transitions. [2021-07-09 17:16:00,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:16:00,673 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:00,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:00,704 INFO L225 Difference]: With dead ends: 19543 [2021-07-09 17:16:00,704 INFO L226 Difference]: Without dead ends: 19523 [2021-07-09 17:16:00,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 100.7ms TimeCoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:16:00,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19523 states. [2021-07-09 17:16:00,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19523 to 15262. [2021-07-09 17:16:00,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15262 states, 15261 states have (on average 2.6088067623353646) internal successors, (39813), 15261 states have internal predecessors, (39813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:00,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15262 states to 15262 states and 39813 transitions. [2021-07-09 17:16:00,965 INFO L78 Accepts]: Start accepts. Automaton has 15262 states and 39813 transitions. Word has length 59 [2021-07-09 17:16:00,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:00,965 INFO L482 AbstractCegarLoop]: Abstraction has 15262 states and 39813 transitions. [2021-07-09 17:16:00,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:00,965 INFO L276 IsEmpty]: Start isEmpty. Operand 15262 states and 39813 transitions. [2021-07-09 17:16:00,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:00,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:00,978 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:01,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable877,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:01,194 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:01,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:01,194 INFO L82 PathProgramCache]: Analyzing trace with hash 828311101, now seen corresponding path program 255 times [2021-07-09 17:16:01,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:01,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026393462] [2021-07-09 17:16:01,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:01,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:01,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026393462] [2021-07-09 17:16:01,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026393462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:01,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1804878325] [2021-07-09 17:16:01,287 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 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:01,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 17:16:01,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:01,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:01,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:01,405 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:01,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1804878325] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:01,405 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:01,405 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:16:01,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519331223] [2021-07-09 17:16:01,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:01,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:01,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:01,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:01,405 INFO L87 Difference]: Start difference. First operand 15262 states and 39813 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:02,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:02,161 INFO L93 Difference]: Finished difference Result 18379 states and 46239 transitions. [2021-07-09 17:16:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:16:02,161 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:02,190 INFO L225 Difference]: With dead ends: 18379 [2021-07-09 17:16:02,190 INFO L226 Difference]: Without dead ends: 18337 [2021-07-09 17:16:02,190 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 208.5ms TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:16:02,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18337 states. [2021-07-09 17:16:02,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18337 to 15333. [2021-07-09 17:16:02,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15333 states, 15332 states have (on average 2.6092486303156797) internal successors, (40005), 15332 states have internal predecessors, (40005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:02,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15333 states to 15333 states and 40005 transitions. [2021-07-09 17:16:02,457 INFO L78 Accepts]: Start accepts. Automaton has 15333 states and 40005 transitions. Word has length 59 [2021-07-09 17:16:02,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:02,457 INFO L482 AbstractCegarLoop]: Abstraction has 15333 states and 40005 transitions. [2021-07-09 17:16:02,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:02,457 INFO L276 IsEmpty]: Start isEmpty. Operand 15333 states and 40005 transitions. [2021-07-09 17:16:02,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:02,470 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:02,470 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:02,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,425 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:02,685 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:02,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:02,685 INFO L82 PathProgramCache]: Analyzing trace with hash -1934097086, now seen corresponding path program 256 times [2021-07-09 17:16:02,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:02,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813572059] [2021-07-09 17:16:02,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:02,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:02,758 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:02,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:02,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813572059] [2021-07-09 17:16:02,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813572059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:02,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334014749] [2021-07-09 17:16:02,758 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 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:02,786 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:02,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:02,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:02,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:02,868 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:02,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334014749] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:02,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:02,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:16:02,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597684116] [2021-07-09 17:16:02,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:02,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:02,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:02,868 INFO L87 Difference]: Start difference. First operand 15333 states and 40005 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:03,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:03,079 INFO L93 Difference]: Finished difference Result 17426 states and 43666 transitions. [2021-07-09 17:16:03,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:16:03,079 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:03,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:03,106 INFO L225 Difference]: With dead ends: 17426 [2021-07-09 17:16:03,106 INFO L226 Difference]: Without dead ends: 17402 [2021-07-09 17:16:03,106 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 82.7ms TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:03,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17402 states. [2021-07-09 17:16:03,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17402 to 14978. [2021-07-09 17:16:03,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14978 states, 14977 states have (on average 2.6034586365760832) internal successors, (38992), 14977 states have internal predecessors, (38992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:03,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14978 states to 14978 states and 38992 transitions. [2021-07-09 17:16:03,343 INFO L78 Accepts]: Start accepts. Automaton has 14978 states and 38992 transitions. Word has length 59 [2021-07-09 17:16:03,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:03,343 INFO L482 AbstractCegarLoop]: Abstraction has 14978 states and 38992 transitions. [2021-07-09 17:16:03,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:03,344 INFO L276 IsEmpty]: Start isEmpty. Operand 14978 states and 38992 transitions. [2021-07-09 17:16:03,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:03,356 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:03,356 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:03,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable881,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:03,572 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:03,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:03,572 INFO L82 PathProgramCache]: Analyzing trace with hash 983147635, now seen corresponding path program 257 times [2021-07-09 17:16:03,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:03,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677502138] [2021-07-09 17:16:03,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:03,671 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:03,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:03,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677502138] [2021-07-09 17:16:03,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677502138] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:03,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122444847] [2021-07-09 17:16:03,671 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 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:03,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 17:16:03,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:03,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:03,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:03,788 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:03,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122444847] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:03,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:03,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:16:03,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112178717] [2021-07-09 17:16:03,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:03,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:03,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:03,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:03,789 INFO L87 Difference]: Start difference. First operand 14978 states and 38992 transitions. Second operand has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:04,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:04,529 INFO L93 Difference]: Finished difference Result 18584 states and 46418 transitions. [2021-07-09 17:16:04,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:04,530 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:04,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:04,560 INFO L225 Difference]: With dead ends: 18584 [2021-07-09 17:16:04,561 INFO L226 Difference]: Without dead ends: 18530 [2021-07-09 17:16:04,561 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 216.8ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:04,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18530 states. [2021-07-09 17:16:04,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18530 to 14933. [2021-07-09 17:16:04,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14933 states, 14932 states have (on average 2.601125100455398) internal successors, (38840), 14932 states have internal predecessors, (38840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:04,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14933 states to 14933 states and 38840 transitions. [2021-07-09 17:16:04,804 INFO L78 Accepts]: Start accepts. Automaton has 14933 states and 38840 transitions. Word has length 59 [2021-07-09 17:16:04,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:04,804 INFO L482 AbstractCegarLoop]: Abstraction has 14933 states and 38840 transitions. [2021-07-09 17:16:04,804 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.285714285714286) internal successors, (60), 13 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:04,804 INFO L276 IsEmpty]: Start isEmpty. Operand 14933 states and 38840 transitions. [2021-07-09 17:16:04,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:04,816 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:04,816 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:05,031 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 427 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable885 [2021-07-09 17:16:05,032 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:05,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:05,032 INFO L82 PathProgramCache]: Analyzing trace with hash 123205708, now seen corresponding path program 120 times [2021-07-09 17:16:05,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:05,032 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29792670] [2021-07-09 17:16:05,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:05,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:05,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:05,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29792670] [2021-07-09 17:16:05,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29792670] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:05,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694819414] [2021-07-09 17:16:05,095 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 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:05,126 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-07-09 17:16:05,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:05,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:05,214 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:05,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694819414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:05,214 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:05,214 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:16:05,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570176147] [2021-07-09 17:16:05,214 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:05,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:05,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:05,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:05,215 INFO L87 Difference]: Start difference. First operand 14933 states and 38840 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:05,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:05,493 INFO L93 Difference]: Finished difference Result 22981 states and 56099 transitions. [2021-07-09 17:16:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:16:05,494 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:05,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:05,540 INFO L225 Difference]: With dead ends: 22981 [2021-07-09 17:16:05,540 INFO L226 Difference]: Without dead ends: 22981 [2021-07-09 17:16:05,540 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=102, Invalid=138, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:05,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22981 states. [2021-07-09 17:16:05,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22981 to 15053. [2021-07-09 17:16:05,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15053 states, 15052 states have (on average 2.6044379484453892) internal successors, (39202), 15052 states have internal predecessors, (39202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:05,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15053 states to 15053 states and 39202 transitions. [2021-07-09 17:16:05,836 INFO L78 Accepts]: Start accepts. Automaton has 15053 states and 39202 transitions. Word has length 59 [2021-07-09 17:16:05,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:05,836 INFO L482 AbstractCegarLoop]: Abstraction has 15053 states and 39202 transitions. [2021-07-09 17:16:05,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:05,836 INFO L276 IsEmpty]: Start isEmpty. Operand 15053 states and 39202 transitions. [2021-07-09 17:16:05,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:05,849 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:05,849 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:06,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable886,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:06,065 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:06,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:06,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1514366748, now seen corresponding path program 121 times [2021-07-09 17:16:06,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:06,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821071313] [2021-07-09 17:16:06,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:06,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:06,143 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:06,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:06,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821071313] [2021-07-09 17:16:06,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821071313] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:06,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093933766] [2021-07-09 17:16:06,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:06,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:06,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:06,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:06,260 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:06,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093933766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:06,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:06,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:16:06,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257781001] [2021-07-09 17:16:06,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:06,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:06,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:06,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=116, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:06,262 INFO L87 Difference]: Start difference. First operand 15053 states and 39202 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:06,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:06,547 INFO L93 Difference]: Finished difference Result 22759 states and 55530 transitions. [2021-07-09 17:16:06,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:16:06,547 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:06,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:06,583 INFO L225 Difference]: With dead ends: 22759 [2021-07-09 17:16:06,583 INFO L226 Difference]: Without dead ends: 22759 [2021-07-09 17:16:06,583 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 111.0ms TimeCoverageRelationStatistics Valid=138, Invalid=204, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:16:06,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22759 states. [2021-07-09 17:16:06,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22759 to 15073. [2021-07-09 17:16:06,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15073 states, 15072 states have (on average 2.6047638004246285) internal successors, (39259), 15072 states have internal predecessors, (39259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:06,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15073 states to 15073 states and 39259 transitions. [2021-07-09 17:16:06,878 INFO L78 Accepts]: Start accepts. Automaton has 15073 states and 39259 transitions. Word has length 59 [2021-07-09 17:16:06,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:06,878 INFO L482 AbstractCegarLoop]: Abstraction has 15073 states and 39259 transitions. [2021-07-09 17:16:06,878 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:06,878 INFO L276 IsEmpty]: Start isEmpty. Operand 15073 states and 39259 transitions. [2021-07-09 17:16:06,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:06,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:06,891 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:07,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable887 [2021-07-09 17:16:07,105 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash 1090605384, now seen corresponding path program 122 times [2021-07-09 17:16:07,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:07,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235276450] [2021-07-09 17:16:07,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 104 proven. 74 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:07,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:07,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235276450] [2021-07-09 17:16:07,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235276450] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:07,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349258265] [2021-07-09 17:16:07,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:07,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:07,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:07,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:07,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:07,308 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:07,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349258265] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:07,308 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:07,309 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-09 17:16:07,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141543465] [2021-07-09 17:16:07,309 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:07,309 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:07,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:07,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:07,309 INFO L87 Difference]: Start difference. First operand 15073 states and 39259 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:07,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:07,658 INFO L93 Difference]: Finished difference Result 19776 states and 48785 transitions. [2021-07-09 17:16:07,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:16:07,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:07,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:07,690 INFO L225 Difference]: With dead ends: 19776 [2021-07-09 17:16:07,690 INFO L226 Difference]: Without dead ends: 19776 [2021-07-09 17:16:07,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 120.3ms TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:16:07,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19776 states. [2021-07-09 17:16:07,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19776 to 14764. [2021-07-09 17:16:07,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14764 states, 14763 states have (on average 2.5980491769965455) internal successors, (38355), 14763 states have internal predecessors, (38355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:07,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38355 transitions. [2021-07-09 17:16:07,965 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38355 transitions. Word has length 59 [2021-07-09 17:16:07,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:07,965 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38355 transitions. [2021-07-09 17:16:07,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:07,965 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38355 transitions. [2021-07-09 17:16:07,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:07,978 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:07,978 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:08,192 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 430 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-07-09 17:16:08,192 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:08,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:08,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1369750312, now seen corresponding path program 258 times [2021-07-09 17:16:08,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:08,192 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218965925] [2021-07-09 17:16:08,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:08,275 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:08,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218965925] [2021-07-09 17:16:08,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218965925] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:08,275 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148177708] [2021-07-09 17:16:08,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:08,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-07-09 17:16:08,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:08,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:08,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:08,390 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 68 proven. 110 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:08,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148177708] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:08,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:08,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:16:08,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999120868] [2021-07-09 17:16:08,391 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:08,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:08,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:08,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:08,391 INFO L87 Difference]: Start difference. First operand 14764 states and 38355 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:08,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:08,627 INFO L93 Difference]: Finished difference Result 16631 states and 41638 transitions. [2021-07-09 17:16:08,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:16:08,627 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:08,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:08,651 INFO L225 Difference]: With dead ends: 16631 [2021-07-09 17:16:08,651 INFO L226 Difference]: Without dead ends: 16604 [2021-07-09 17:16:08,651 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 101.8ms TimeCoverageRelationStatistics Valid=92, Invalid=214, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:16:08,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16604 states. [2021-07-09 17:16:08,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16604 to 14764. [2021-07-09 17:16:08,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14764 states, 14763 states have (on average 2.597439544807966) internal successors, (38346), 14763 states have internal predecessors, (38346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:08,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14764 states to 14764 states and 38346 transitions. [2021-07-09 17:16:08,896 INFO L78 Accepts]: Start accepts. Automaton has 14764 states and 38346 transitions. Word has length 59 [2021-07-09 17:16:08,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:08,896 INFO L482 AbstractCegarLoop]: Abstraction has 14764 states and 38346 transitions. [2021-07-09 17:16:08,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:08,896 INFO L276 IsEmpty]: Start isEmpty. Operand 14764 states and 38346 transitions. [2021-07-09 17:16:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:08,909 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:08,909 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:09,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable889 [2021-07-09 17:16:09,124 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:09,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:09,124 INFO L82 PathProgramCache]: Analyzing trace with hash -1823442059, now seen corresponding path program 123 times [2021-07-09 17:16:09,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:09,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875362291] [2021-07-09 17:16:09,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:09,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:09,215 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:09,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:09,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875362291] [2021-07-09 17:16:09,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875362291] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:09,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548407068] [2021-07-09 17:16:09,215 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 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:09,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 17:16:09,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:09,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:09,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:09,334 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:09,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1548407068] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:09,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:09,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:16:09,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323504884] [2021-07-09 17:16:09,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:09,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:09,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:09,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:09,335 INFO L87 Difference]: Start difference. First operand 14764 states and 38346 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:09,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:09,898 INFO L93 Difference]: Finished difference Result 16764 states and 42302 transitions. [2021-07-09 17:16:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:09,898 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:09,924 INFO L225 Difference]: With dead ends: 16764 [2021-07-09 17:16:09,924 INFO L226 Difference]: Without dead ends: 16726 [2021-07-09 17:16:09,924 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:16:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16726 states. [2021-07-09 17:16:10,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16726 to 14878. [2021-07-09 17:16:10,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14878 states, 14877 states have (on average 2.597297842306917) internal successors, (38640), 14877 states have internal predecessors, (38640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:10,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14878 states to 14878 states and 38640 transitions. [2021-07-09 17:16:10,166 INFO L78 Accepts]: Start accepts. Automaton has 14878 states and 38640 transitions. Word has length 59 [2021-07-09 17:16:10,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:10,166 INFO L482 AbstractCegarLoop]: Abstraction has 14878 states and 38640 transitions. [2021-07-09 17:16:10,166 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:10,166 INFO L276 IsEmpty]: Start isEmpty. Operand 14878 states and 38640 transitions. [2021-07-09 17:16:10,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:10,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:10,179 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:10,379 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 432 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable894 [2021-07-09 17:16:10,380 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:10,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:10,380 INFO L82 PathProgramCache]: Analyzing trace with hash 917828380, now seen corresponding path program 259 times [2021-07-09 17:16:10,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:10,380 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266120393] [2021-07-09 17:16:10,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:10,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:10,441 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 62 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:10,441 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:10,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266120393] [2021-07-09 17:16:10,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266120393] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:10,441 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690879210] [2021-07-09 17:16:10,441 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 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:10,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:10,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:10,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 62 proven. 112 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:10,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [690879210] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:10,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:10,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:16:10,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421837055] [2021-07-09 17:16:10,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:16:10,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:10,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:16:10,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:16:10,549 INFO L87 Difference]: Start difference. First operand 14878 states and 38640 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:10,743 INFO L93 Difference]: Finished difference Result 17271 states and 42891 transitions. [2021-07-09 17:16:10,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:16:10,743 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:10,770 INFO L225 Difference]: With dead ends: 17271 [2021-07-09 17:16:10,771 INFO L226 Difference]: Without dead ends: 17268 [2021-07-09 17:16:10,771 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 55.1ms TimeCoverageRelationStatistics Valid=55, Invalid=77, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:10,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17268 states. [2021-07-09 17:16:10,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17268 to 14858. [2021-07-09 17:16:10,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 14857 states have (on average 2.5956114962643873) internal successors, (38563), 14857 states have internal predecessors, (38563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:11,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38563 transitions. [2021-07-09 17:16:11,022 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38563 transitions. Word has length 59 [2021-07-09 17:16:11,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:11,022 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38563 transitions. [2021-07-09 17:16:11,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:11,022 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38563 transitions. [2021-07-09 17:16:11,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:11,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:11,035 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:11,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 433 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable895 [2021-07-09 17:16:11,255 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:11,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:11,255 INFO L82 PathProgramCache]: Analyzing trace with hash 1124890946, now seen corresponding path program 260 times [2021-07-09 17:16:11,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:11,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644245943] [2021-07-09 17:16:11,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:11,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:11,321 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:11,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:11,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644245943] [2021-07-09 17:16:11,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644245943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:11,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917124027] [2021-07-09 17:16:11,321 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 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:11,351 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:11,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:11,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:11,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:11,438 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 57 proven. 117 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:11,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [917124027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:11,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:11,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:16:11,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307137392] [2021-07-09 17:16:11,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:11,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:11,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:11,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:11,439 INFO L87 Difference]: Start difference. First operand 14858 states and 38563 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) [2021-07-09 17:16:11,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:11,649 INFO L93 Difference]: Finished difference Result 17287 states and 42863 transitions. [2021-07-09 17:16:11,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:16:11,650 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:11,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:11,681 INFO L225 Difference]: With dead ends: 17287 [2021-07-09 17:16:11,681 INFO L226 Difference]: Without dead ends: 17269 [2021-07-09 17:16:11,681 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:11,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17269 states. [2021-07-09 17:16:11,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17269 to 14858. [2021-07-09 17:16:11,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14858 states, 14857 states have (on average 2.593996096116309) internal successors, (38539), 14857 states have internal predecessors, (38539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:11,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14858 states to 14858 states and 38539 transitions. [2021-07-09 17:16:11,932 INFO L78 Accepts]: Start accepts. Automaton has 14858 states and 38539 transitions. Word has length 59 [2021-07-09 17:16:11,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:11,932 INFO L482 AbstractCegarLoop]: Abstraction has 14858 states and 38539 transitions. [2021-07-09 17:16:11,932 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) [2021-07-09 17:16:11,932 INFO L276 IsEmpty]: Start isEmpty. Operand 14858 states and 38539 transitions. [2021-07-09 17:16:11,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:11,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:11,944 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:12,160 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable897,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:12,160 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:12,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:12,160 INFO L82 PathProgramCache]: Analyzing trace with hash -323109067, now seen corresponding path program 261 times [2021-07-09 17:16:12,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:12,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948000746] [2021-07-09 17:16:12,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:12,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:12,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948000746] [2021-07-09 17:16:12,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948000746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:12,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947739902] [2021-07-09 17:16:12,246 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 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:12,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 17:16:12,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:12,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:12,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:12,376 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:12,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947739902] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:12,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:12,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:16:12,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578580201] [2021-07-09 17:16:12,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:12,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:12,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:12,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:12,377 INFO L87 Difference]: Start difference. First operand 14858 states and 38539 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:13,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:13,128 INFO L93 Difference]: Finished difference Result 15989 states and 40590 transitions. [2021-07-09 17:16:13,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:13,129 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:13,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:13,153 INFO L225 Difference]: With dead ends: 15989 [2021-07-09 17:16:13,153 INFO L226 Difference]: Without dead ends: 15915 [2021-07-09 17:16:13,153 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:16:13,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15915 states. [2021-07-09 17:16:13,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15915 to 14924. [2021-07-09 17:16:13,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14924 states, 14923 states have (on average 2.588956644106413) internal successors, (38635), 14923 states have internal predecessors, (38635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:13,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14924 states to 14924 states and 38635 transitions. [2021-07-09 17:16:13,387 INFO L78 Accepts]: Start accepts. Automaton has 14924 states and 38635 transitions. Word has length 59 [2021-07-09 17:16:13,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:13,387 INFO L482 AbstractCegarLoop]: Abstraction has 14924 states and 38635 transitions. [2021-07-09 17:16:13,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:13,388 INFO L276 IsEmpty]: Start isEmpty. Operand 14924 states and 38635 transitions. [2021-07-09 17:16:13,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:13,401 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:13,401 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:13,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:13,622 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:13,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:13,622 INFO L82 PathProgramCache]: Analyzing trace with hash -936645247, now seen corresponding path program 262 times [2021-07-09 17:16:13,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:13,622 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539303644] [2021-07-09 17:16:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:13,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:13,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:13,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539303644] [2021-07-09 17:16:13,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539303644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:13,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783162961] [2021-07-09 17:16:13,716 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 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:13,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:13,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:13,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:13,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:13,828 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:13,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783162961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:13,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:13,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:16:13,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44498548] [2021-07-09 17:16:13,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:13,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:13,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:13,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:13,829 INFO L87 Difference]: Start difference. First operand 14924 states and 38635 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:14,426 INFO L93 Difference]: Finished difference Result 16650 states and 42030 transitions. [2021-07-09 17:16:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:14,427 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:14,452 INFO L225 Difference]: With dead ends: 16650 [2021-07-09 17:16:14,452 INFO L226 Difference]: Without dead ends: 16638 [2021-07-09 17:16:14,452 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:16:14,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16638 states. [2021-07-09 17:16:14,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16638 to 14998. [2021-07-09 17:16:14,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14998 states, 14997 states have (on average 2.587784223511369) internal successors, (38809), 14997 states have internal predecessors, (38809), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:14,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14998 states to 14998 states and 38809 transitions. [2021-07-09 17:16:14,696 INFO L78 Accepts]: Start accepts. Automaton has 14998 states and 38809 transitions. Word has length 59 [2021-07-09 17:16:14,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:14,696 INFO L482 AbstractCegarLoop]: Abstraction has 14998 states and 38809 transitions. [2021-07-09 17:16:14,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:14,696 INFO L276 IsEmpty]: Start isEmpty. Operand 14998 states and 38809 transitions. [2021-07-09 17:16:14,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:14,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:14,709 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:14,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable901,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:14,925 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:14,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:14,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1205272087, now seen corresponding path program 263 times [2021-07-09 17:16:14,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:14,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151773645] [2021-07-09 17:16:14,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:15,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:15,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151773645] [2021-07-09 17:16:15,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151773645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:15,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059160368] [2021-07-09 17:16:15,016 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 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:15,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 17:16:15,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:15,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:15,133 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:15,133 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059160368] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:15,133 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:15,133 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:16:15,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217388305] [2021-07-09 17:16:15,133 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:15,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:15,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:15,134 INFO L87 Difference]: Start difference. First operand 14998 states and 38809 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:15,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:15,861 INFO L93 Difference]: Finished difference Result 18719 states and 46626 transitions. [2021-07-09 17:16:15,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:16:15,861 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:15,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:15,889 INFO L225 Difference]: With dead ends: 18719 [2021-07-09 17:16:15,889 INFO L226 Difference]: Without dead ends: 18665 [2021-07-09 17:16:15,890 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 226.4ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:15,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18665 states. [2021-07-09 17:16:16,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18665 to 15200. [2021-07-09 17:16:16,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15200 states, 15199 states have (on average 2.5887887361010593) internal successors, (39347), 15199 states have internal predecessors, (39347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:16,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39347 transitions. [2021-07-09 17:16:16,137 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39347 transitions. Word has length 59 [2021-07-09 17:16:16,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:16,137 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39347 transitions. [2021-07-09 17:16:16,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:16,137 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39347 transitions. [2021-07-09 17:16:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:16,149 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:16,149 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:16,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable902,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:16,365 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:16,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:16,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1557136100, now seen corresponding path program 264 times [2021-07-09 17:16:16,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:16,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084866762] [2021-07-09 17:16:16,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:16,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:16,440 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:16,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:16,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084866762] [2021-07-09 17:16:16,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084866762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:16,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044986395] [2021-07-09 17:16:16,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:16,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:16:16,473 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:16,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:16,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 125 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:16,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044986395] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:16,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:16,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:16:16,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758699643] [2021-07-09 17:16:16,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:16,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:16,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:16,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:16,556 INFO L87 Difference]: Start difference. First operand 15200 states and 39347 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:16,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:16,825 INFO L93 Difference]: Finished difference Result 17641 states and 43655 transitions. [2021-07-09 17:16:16,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:16:16,825 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:16,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:16,850 INFO L225 Difference]: With dead ends: 17641 [2021-07-09 17:16:16,850 INFO L226 Difference]: Without dead ends: 17617 [2021-07-09 17:16:16,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 84.9ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:16,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17617 states. [2021-07-09 17:16:17,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17617 to 15200. [2021-07-09 17:16:17,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15200 states, 15199 states have (on average 2.587670241463254) internal successors, (39330), 15199 states have internal predecessors, (39330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:17,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15200 states to 15200 states and 39330 transitions. [2021-07-09 17:16:17,089 INFO L78 Accepts]: Start accepts. Automaton has 15200 states and 39330 transitions. Word has length 59 [2021-07-09 17:16:17,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:17,089 INFO L482 AbstractCegarLoop]: Abstraction has 15200 states and 39330 transitions. [2021-07-09 17:16:17,089 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:17,089 INFO L276 IsEmpty]: Start isEmpty. Operand 15200 states and 39330 transitions. [2021-07-09 17:16:17,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:17,102 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:17,102 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:17,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable903 [2021-07-09 17:16:17,317 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:17,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:17,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1360108621, now seen corresponding path program 265 times [2021-07-09 17:16:17,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:17,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223140507] [2021-07-09 17:16:17,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:17,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:17,419 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:17,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:17,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223140507] [2021-07-09 17:16:17,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223140507] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:17,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825791876] [2021-07-09 17:16:17,420 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 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:17,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:17,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:17,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:17,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825791876] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:17,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:17,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:16:17,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463409632] [2021-07-09 17:16:17,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:17,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:17,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:17,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:17,534 INFO L87 Difference]: Start difference. First operand 15200 states and 39330 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:18,522 INFO L93 Difference]: Finished difference Result 21862 states and 53696 transitions. [2021-07-09 17:16:18,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-09 17:16:18,523 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:18,558 INFO L225 Difference]: With dead ends: 21862 [2021-07-09 17:16:18,558 INFO L226 Difference]: Without dead ends: 21748 [2021-07-09 17:16:18,558 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 369.9ms TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-07-09 17:16:18,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21748 states. [2021-07-09 17:16:18,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21748 to 15415. [2021-07-09 17:16:18,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15415 states, 15414 states have (on average 2.589139743090697) internal successors, (39909), 15414 states have internal predecessors, (39909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:18,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15415 states to 15415 states and 39909 transitions. [2021-07-09 17:16:18,871 INFO L78 Accepts]: Start accepts. Automaton has 15415 states and 39909 transitions. Word has length 59 [2021-07-09 17:16:18,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:18,872 INFO L482 AbstractCegarLoop]: Abstraction has 15415 states and 39909 transitions. [2021-07-09 17:16:18,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:18,872 INFO L276 IsEmpty]: Start isEmpty. Operand 15415 states and 39909 transitions. [2021-07-09 17:16:18,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:18,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:18,885 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:19,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable907,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:19,100 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:19,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:19,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1746711298, now seen corresponding path program 266 times [2021-07-09 17:16:19,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:19,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536066675] [2021-07-09 17:16:19,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:19,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:19,182 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:19,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536066675] [2021-07-09 17:16:19,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536066675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:19,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007290980] [2021-07-09 17:16:19,182 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 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:19,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:19,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:19,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:19,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:19,292 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:19,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007290980] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:19,292 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:19,292 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:16:19,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695006377] [2021-07-09 17:16:19,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:19,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:19,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:19,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:19,293 INFO L87 Difference]: Start difference. First operand 15415 states and 39909 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:19,576 INFO L93 Difference]: Finished difference Result 17893 states and 44283 transitions. [2021-07-09 17:16:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:16:19,576 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:19,604 INFO L225 Difference]: With dead ends: 17893 [2021-07-09 17:16:19,604 INFO L226 Difference]: Without dead ends: 17860 [2021-07-09 17:16:19,605 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 100.5ms TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:16:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17860 states. [2021-07-09 17:16:19,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17860 to 15072. [2021-07-09 17:16:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15072 states, 15071 states have (on average 2.5837038020038485) internal successors, (38939), 15071 states have internal predecessors, (38939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15072 states to 15072 states and 38939 transitions. [2021-07-09 17:16:19,855 INFO L78 Accepts]: Start accepts. Automaton has 15072 states and 38939 transitions. Word has length 59 [2021-07-09 17:16:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:19,855 INFO L482 AbstractCegarLoop]: Abstraction has 15072 states and 38939 transitions. [2021-07-09 17:16:19,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 15072 states and 38939 transitions. [2021-07-09 17:16:19,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:19,869 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:19,869 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:20,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable908,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:20,086 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:20,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:20,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1300417111, now seen corresponding path program 267 times [2021-07-09 17:16:20,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:20,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541600110] [2021-07-09 17:16:20,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:20,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:20,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:20,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541600110] [2021-07-09 17:16:20,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541600110] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:20,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466985092] [2021-07-09 17:16:20,198 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 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:20,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-09 17:16:20,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:20,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:20,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:20,315 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:20,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466985092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:20,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:20,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:16:20,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111795128] [2021-07-09 17:16:20,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:20,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:20,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:20,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:20,316 INFO L87 Difference]: Start difference. First operand 15072 states and 38939 transitions. Second operand has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:21,086 INFO L93 Difference]: Finished difference Result 20407 states and 50176 transitions. [2021-07-09 17:16:21,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:16:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:21,126 INFO L225 Difference]: With dead ends: 20407 [2021-07-09 17:16:21,127 INFO L226 Difference]: Without dead ends: 20251 [2021-07-09 17:16:21,127 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 259.2ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:16:21,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20251 states. [2021-07-09 17:16:21,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20251 to 14617. [2021-07-09 17:16:21,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14617 states, 14616 states have (on average 2.5764915161466884) internal successors, (37658), 14616 states have internal predecessors, (37658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:21,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14617 states to 14617 states and 37658 transitions. [2021-07-09 17:16:21,435 INFO L78 Accepts]: Start accepts. Automaton has 14617 states and 37658 transitions. Word has length 59 [2021-07-09 17:16:21,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:21,435 INFO L482 AbstractCegarLoop]: Abstraction has 14617 states and 37658 transitions. [2021-07-09 17:16:21,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.0) internal successors, (60), 14 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:21,435 INFO L276 IsEmpty]: Start isEmpty. Operand 14617 states and 37658 transitions. [2021-07-09 17:16:21,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:21,448 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:21,448 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:21,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable913 [2021-07-09 17:16:21,661 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:21,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:21,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1062355594, now seen corresponding path program 124 times [2021-07-09 17:16:21,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:21,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326030424] [2021-07-09 17:16:21,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:21,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:21,739 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 44 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:21,739 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:21,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326030424] [2021-07-09 17:16:21,739 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326030424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:21,739 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711538322] [2021-07-09 17:16:21,739 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 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:21,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:21,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:21,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:21,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:21,868 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:21,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711538322] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:21,869 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:21,869 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:16:21,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073553144] [2021-07-09 17:16:21,869 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:21,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:21,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:21,869 INFO L87 Difference]: Start difference. First operand 14617 states and 37658 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:22,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:22,131 INFO L93 Difference]: Finished difference Result 18811 states and 46226 transitions. [2021-07-09 17:16:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:16:22,131 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:22,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:22,159 INFO L225 Difference]: With dead ends: 18811 [2021-07-09 17:16:22,160 INFO L226 Difference]: Without dead ends: 18797 [2021-07-09 17:16:22,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 79.9ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:22,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18797 states. [2021-07-09 17:16:22,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18797 to 14958. [2021-07-09 17:16:22,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14958 states, 14957 states have (on average 2.5815337300260746) internal successors, (38612), 14957 states have internal predecessors, (38612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:22,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14958 states to 14958 states and 38612 transitions. [2021-07-09 17:16:22,407 INFO L78 Accepts]: Start accepts. Automaton has 14958 states and 38612 transitions. Word has length 59 [2021-07-09 17:16:22,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:22,407 INFO L482 AbstractCegarLoop]: Abstraction has 14958 states and 38612 transitions. [2021-07-09 17:16:22,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:22,407 INFO L276 IsEmpty]: Start isEmpty. Operand 14958 states and 38612 transitions. [2021-07-09 17:16:22,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:22,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:22,420 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:22,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable914,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:22,633 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:22,633 INFO L82 PathProgramCache]: Analyzing trace with hash 440475184, now seen corresponding path program 125 times [2021-07-09 17:16:22,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:22,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507751091] [2021-07-09 17:16:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:22,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:22,697 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 134 proven. 43 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:22,697 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:22,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507751091] [2021-07-09 17:16:22,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507751091] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:22,697 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718399611] [2021-07-09 17:16:22,697 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 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:22,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 17:16:22,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:22,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:22,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 43 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:22,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1718399611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:22,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:22,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-09 17:16:22,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254611209] [2021-07-09 17:16:22,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:22,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:22,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:22,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:22,837 INFO L87 Difference]: Start difference. First operand 14958 states and 38612 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:23,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:23,114 INFO L93 Difference]: Finished difference Result 23655 states and 57376 transitions. [2021-07-09 17:16:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:16:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:23,156 INFO L225 Difference]: With dead ends: 23655 [2021-07-09 17:16:23,156 INFO L226 Difference]: Without dead ends: 23655 [2021-07-09 17:16:23,156 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 103.7ms TimeCoverageRelationStatistics Valid=144, Invalid=198, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:16:23,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23655 states. [2021-07-09 17:16:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23655 to 14973. [2021-07-09 17:16:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14973 states, 14972 states have (on average 2.5819529788939355) internal successors, (38657), 14972 states have internal predecessors, (38657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:23,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14973 states to 14973 states and 38657 transitions. [2021-07-09 17:16:23,454 INFO L78 Accepts]: Start accepts. Automaton has 14973 states and 38657 transitions. Word has length 59 [2021-07-09 17:16:23,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:23,454 INFO L482 AbstractCegarLoop]: Abstraction has 14973 states and 38657 transitions. [2021-07-09 17:16:23,454 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:23,454 INFO L276 IsEmpty]: Start isEmpty. Operand 14973 states and 38657 transitions. [2021-07-09 17:16:23,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:23,467 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:23,467 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:23,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable916,443 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:23,674 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:23,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:23,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1197097272, now seen corresponding path program 126 times [2021-07-09 17:16:23,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:23,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999614877] [2021-07-09 17:16:23,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:23,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:23,751 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 131 proven. 46 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:23,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:23,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999614877] [2021-07-09 17:16:23,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999614877] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:23,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292882704] [2021-07-09 17:16:23,752 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 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:23,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-09 17:16:23,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:23,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:23,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 132 proven. 46 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:23,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292882704] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:23,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:23,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:16:23,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915244342] [2021-07-09 17:16:23,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:23,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:23,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:23,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=115, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:23,877 INFO L87 Difference]: Start difference. First operand 14973 states and 38657 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:24,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:24,204 INFO L93 Difference]: Finished difference Result 24867 states and 60280 transitions. [2021-07-09 17:16:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:16:24,205 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:24,247 INFO L225 Difference]: With dead ends: 24867 [2021-07-09 17:16:24,247 INFO L226 Difference]: Without dead ends: 24867 [2021-07-09 17:16:24,247 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 131.9ms TimeCoverageRelationStatistics Valid=170, Invalid=250, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:16:24,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24867 states. [2021-07-09 17:16:24,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24867 to 15014. [2021-07-09 17:16:24,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15014 states, 15013 states have (on average 2.5834276959968028) internal successors, (38785), 15013 states have internal predecessors, (38785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:24,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15014 states to 15014 states and 38785 transitions. [2021-07-09 17:16:24,539 INFO L78 Accepts]: Start accepts. Automaton has 15014 states and 38785 transitions. Word has length 59 [2021-07-09 17:16:24,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:24,539 INFO L482 AbstractCegarLoop]: Abstraction has 15014 states and 38785 transitions. [2021-07-09 17:16:24,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:24,539 INFO L276 IsEmpty]: Start isEmpty. Operand 15014 states and 38785 transitions. [2021-07-09 17:16:24,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:24,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:24,551 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:24,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable917,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:24,767 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:24,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:24,767 INFO L82 PathProgramCache]: Analyzing trace with hash 1407874860, now seen corresponding path program 127 times [2021-07-09 17:16:24,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:24,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411164630] [2021-07-09 17:16:24,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:24,852 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 118 proven. 59 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:24,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:24,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411164630] [2021-07-09 17:16:24,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411164630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:24,853 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675462643] [2021-07-09 17:16:24,853 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 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:24,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:24,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:24,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:24,970 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 119 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:24,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675462643] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:24,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:24,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-09 17:16:24,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035956031] [2021-07-09 17:16:24,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:24,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:24,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:24,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:24,971 INFO L87 Difference]: Start difference. First operand 15014 states and 38785 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:25,316 INFO L93 Difference]: Finished difference Result 23075 states and 56081 transitions. [2021-07-09 17:16:25,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:16:25,316 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:25,351 INFO L225 Difference]: With dead ends: 23075 [2021-07-09 17:16:25,352 INFO L226 Difference]: Without dead ends: 23075 [2021-07-09 17:16:25,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:25,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23075 states. [2021-07-09 17:16:25,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23075 to 15042. [2021-07-09 17:16:25,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15042 states, 15041 states have (on average 2.5839372382155443) internal successors, (38865), 15041 states have internal predecessors, (38865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15042 states to 15042 states and 38865 transitions. [2021-07-09 17:16:25,686 INFO L78 Accepts]: Start accepts. Automaton has 15042 states and 38865 transitions. Word has length 59 [2021-07-09 17:16:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:25,686 INFO L482 AbstractCegarLoop]: Abstraction has 15042 states and 38865 transitions. [2021-07-09 17:16:25,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 15042 states and 38865 transitions. [2021-07-09 17:16:25,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:25,698 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:25,698 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:25,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable918 [2021-07-09 17:16:25,914 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:25,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:25,914 INFO L82 PathProgramCache]: Analyzing trace with hash 368587848, now seen corresponding path program 128 times [2021-07-09 17:16:25,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:25,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254581873] [2021-07-09 17:16:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:25,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:26,020 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 105 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:26,020 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:26,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254581873] [2021-07-09 17:16:26,020 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254581873] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:26,020 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702851408] [2021-07-09 17:16:26,021 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 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:26,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:26,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:26,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:26,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:26,143 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 73 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:26,143 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702851408] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:26,143 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:26,143 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-09 17:16:26,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075734870] [2021-07-09 17:16:26,143 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:26,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:26,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:26,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:26,144 INFO L87 Difference]: Start difference. First operand 15042 states and 38865 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:26,478 INFO L93 Difference]: Finished difference Result 19432 states and 47841 transitions. [2021-07-09 17:16:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:16:26,478 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:26,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:26,508 INFO L225 Difference]: With dead ends: 19432 [2021-07-09 17:16:26,508 INFO L226 Difference]: Without dead ends: 19432 [2021-07-09 17:16:26,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 162.8ms TimeCoverageRelationStatistics Valid=188, Invalid=318, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:26,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19432 states. [2021-07-09 17:16:26,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19432 to 14656. [2021-07-09 17:16:26,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14656 states, 14655 states have (on average 2.5765950187649267) internal successors, (37760), 14655 states have internal predecessors, (37760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:26,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37760 transitions. [2021-07-09 17:16:26,754 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37760 transitions. Word has length 59 [2021-07-09 17:16:26,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:26,755 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37760 transitions. [2021-07-09 17:16:26,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:26,755 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37760 transitions. [2021-07-09 17:16:26,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:26,767 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:26,767 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:26,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 446 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable919 [2021-07-09 17:16:26,981 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:26,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:26,981 INFO L82 PathProgramCache]: Analyzing trace with hash -1100977316, now seen corresponding path program 268 times [2021-07-09 17:16:26,981 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:26,981 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476737659] [2021-07-09 17:16:26,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:26,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:27,071 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:27,071 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:27,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476737659] [2021-07-09 17:16:27,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476737659] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:27,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117300942] [2021-07-09 17:16:27,071 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 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:27,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:27,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:27,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:27,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:27,180 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:27,180 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117300942] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:27,180 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:27,180 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:16:27,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010390799] [2021-07-09 17:16:27,180 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:27,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:27,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:27,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:27,180 INFO L87 Difference]: Start difference. First operand 14656 states and 37760 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:27,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:27,434 INFO L93 Difference]: Finished difference Result 16822 states and 41592 transitions. [2021-07-09 17:16:27,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:16:27,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:27,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:27,459 INFO L225 Difference]: With dead ends: 16822 [2021-07-09 17:16:27,459 INFO L226 Difference]: Without dead ends: 16786 [2021-07-09 17:16:27,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 117.9ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:16:27,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16786 states. [2021-07-09 17:16:27,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16786 to 14656. [2021-07-09 17:16:27,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14656 states, 14655 states have (on average 2.5757761856021837) internal successors, (37748), 14655 states have internal predecessors, (37748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14656 states to 14656 states and 37748 transitions. [2021-07-09 17:16:27,700 INFO L78 Accepts]: Start accepts. Automaton has 14656 states and 37748 transitions. Word has length 59 [2021-07-09 17:16:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:27,701 INFO L482 AbstractCegarLoop]: Abstraction has 14656 states and 37748 transitions. [2021-07-09 17:16:27,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 14656 states and 37748 transitions. [2021-07-09 17:16:27,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:27,714 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:27,714 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:27,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable920 [2021-07-09 17:16:27,929 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:27,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:27,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1176780123, now seen corresponding path program 129 times [2021-07-09 17:16:27,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:27,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863849366] [2021-07-09 17:16:27,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:28,019 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863849366] [2021-07-09 17:16:28,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863849366] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:28,019 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224435250] [2021-07-09 17:16:28,019 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 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:28,054 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-09 17:16:28,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:28,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:28,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:28,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224435250] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:28,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:28,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:16:28,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956119905] [2021-07-09 17:16:28,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:28,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:28,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:28,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:28,141 INFO L87 Difference]: Start difference. First operand 14656 states and 37748 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:28,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:28,691 INFO L93 Difference]: Finished difference Result 16512 states and 41427 transitions. [2021-07-09 17:16:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:28,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:28,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:28,717 INFO L225 Difference]: With dead ends: 16512 [2021-07-09 17:16:28,717 INFO L226 Difference]: Without dead ends: 16481 [2021-07-09 17:16:28,717 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 145.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:16:28,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16481 states. [2021-07-09 17:16:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16481 to 14732. [2021-07-09 17:16:28,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14732 states, 14731 states have (on average 2.5756567782227955) internal successors, (37942), 14731 states have internal predecessors, (37942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:28,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14732 states to 14732 states and 37942 transitions. [2021-07-09 17:16:28,954 INFO L78 Accepts]: Start accepts. Automaton has 14732 states and 37942 transitions. Word has length 59 [2021-07-09 17:16:28,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:28,954 INFO L482 AbstractCegarLoop]: Abstraction has 14732 states and 37942 transitions. [2021-07-09 17:16:28,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:28,954 INFO L276 IsEmpty]: Start isEmpty. Operand 14732 states and 37942 transitions. [2021-07-09 17:16:28,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:28,966 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:28,966 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:29,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable926,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:29,182 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:29,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:29,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1617854181, now seen corresponding path program 269 times [2021-07-09 17:16:29,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:29,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117680370] [2021-07-09 17:16:29,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:29,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:29,266 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:29,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117680370] [2021-07-09 17:16:29,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117680370] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:29,266 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024163856] [2021-07-09 17:16:29,266 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 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:29,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-09 17:16:29,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:29,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:29,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:29,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024163856] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:29,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:29,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:16:29,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274883704] [2021-07-09 17:16:29,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:29,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:29,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:29,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:29,394 INFO L87 Difference]: Start difference. First operand 14732 states and 37942 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:30,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:30,142 INFO L93 Difference]: Finished difference Result 15859 states and 40013 transitions. [2021-07-09 17:16:30,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:30,143 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:30,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:30,166 INFO L225 Difference]: With dead ends: 15859 [2021-07-09 17:16:30,166 INFO L226 Difference]: Without dead ends: 15767 [2021-07-09 17:16:30,166 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:16:30,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15767 states. [2021-07-09 17:16:30,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15767 to 14855. [2021-07-09 17:16:30,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14855 states, 14854 states have (on average 2.569341591490508) internal successors, (38165), 14854 states have internal predecessors, (38165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:30,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14855 states to 14855 states and 38165 transitions. [2021-07-09 17:16:30,406 INFO L78 Accepts]: Start accepts. Automaton has 14855 states and 38165 transitions. Word has length 59 [2021-07-09 17:16:30,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:30,407 INFO L482 AbstractCegarLoop]: Abstraction has 14855 states and 38165 transitions. [2021-07-09 17:16:30,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:30,407 INFO L276 IsEmpty]: Start isEmpty. Operand 14855 states and 38165 transitions. [2021-07-09 17:16:30,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:30,420 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:30,420 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:30,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable927,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:30,636 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:30,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:30,636 INFO L82 PathProgramCache]: Analyzing trace with hash 2063576935, now seen corresponding path program 270 times [2021-07-09 17:16:30,636 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:30,636 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087686038] [2021-07-09 17:16:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:30,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:30,727 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:30,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:30,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087686038] [2021-07-09 17:16:30,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087686038] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:30,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138814753] [2021-07-09 17:16:30,727 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 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:30,760 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-09 17:16:30,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:30,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:30,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:30,844 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:30,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138814753] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:30,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:30,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:16:30,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030160447] [2021-07-09 17:16:30,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:30,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:30,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:30,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:30,844 INFO L87 Difference]: Start difference. First operand 14855 states and 38165 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:31,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:31,434 INFO L93 Difference]: Finished difference Result 16568 states and 41541 transitions. [2021-07-09 17:16:31,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:31,435 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:31,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:31,460 INFO L225 Difference]: With dead ends: 16568 [2021-07-09 17:16:31,460 INFO L226 Difference]: Without dead ends: 16556 [2021-07-09 17:16:31,460 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 147.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:16:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16556 states. [2021-07-09 17:16:31,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16556 to 14951. [2021-07-09 17:16:31,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14951 states, 14950 states have (on average 2.568561872909699) internal successors, (38400), 14950 states have internal predecessors, (38400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:31,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14951 states to 14951 states and 38400 transitions. [2021-07-09 17:16:31,697 INFO L78 Accepts]: Start accepts. Automaton has 14951 states and 38400 transitions. Word has length 59 [2021-07-09 17:16:31,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:31,697 INFO L482 AbstractCegarLoop]: Abstraction has 14951 states and 38400 transitions. [2021-07-09 17:16:31,697 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:31,697 INFO L276 IsEmpty]: Start isEmpty. Operand 14951 states and 38400 transitions. [2021-07-09 17:16:31,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:31,710 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:31,710 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:31,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:31,924 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:31,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:31,924 INFO L82 PathProgramCache]: Analyzing trace with hash 415219432, now seen corresponding path program 271 times [2021-07-09 17:16:31,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:31,924 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751596684] [2021-07-09 17:16:31,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:31,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:31,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751596684] [2021-07-09 17:16:31,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751596684] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539064960] [2021-07-09 17:16:31,987 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 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:32,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:32,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 50 proven. 126 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:32,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1539064960] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:32,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:32,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:16:32,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677898039] [2021-07-09 17:16:32,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:32,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:32,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:32,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:32,097 INFO L87 Difference]: Start difference. First operand 14951 states and 38400 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:32,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:32,330 INFO L93 Difference]: Finished difference Result 17530 states and 42981 transitions. [2021-07-09 17:16:32,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:16:32,331 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:32,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:32,356 INFO L225 Difference]: With dead ends: 17530 [2021-07-09 17:16:32,357 INFO L226 Difference]: Without dead ends: 17512 [2021-07-09 17:16:32,357 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 73.8ms TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:32,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17512 states. [2021-07-09 17:16:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17512 to 14926. [2021-07-09 17:16:32,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14926 states, 14925 states have (on average 2.5662311557788944) internal successors, (38301), 14925 states have internal predecessors, (38301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14926 states to 14926 states and 38301 transitions. [2021-07-09 17:16:32,591 INFO L78 Accepts]: Start accepts. Automaton has 14926 states and 38301 transitions. Word has length 59 [2021-07-09 17:16:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:32,591 INFO L482 AbstractCegarLoop]: Abstraction has 14926 states and 38301 transitions. [2021-07-09 17:16:32,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:32,591 INFO L276 IsEmpty]: Start isEmpty. Operand 14926 states and 38301 transitions. [2021-07-09 17:16:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:32,605 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:32,605 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:32,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable929,451 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:32,821 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:32,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:32,821 INFO L82 PathProgramCache]: Analyzing trace with hash -89473027, now seen corresponding path program 272 times [2021-07-09 17:16:32,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:32,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789303954] [2021-07-09 17:16:32,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:32,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:32,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789303954] [2021-07-09 17:16:32,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789303954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:32,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15038924] [2021-07-09 17:16:32,911 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 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:32,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:32,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:32,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:32,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:33,027 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:33,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15038924] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:33,027 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:33,027 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:16:33,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831867046] [2021-07-09 17:16:33,027 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:33,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:33,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:33,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:33,027 INFO L87 Difference]: Start difference. First operand 14926 states and 38301 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:33,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:33,795 INFO L93 Difference]: Finished difference Result 18642 states and 46055 transitions. [2021-07-09 17:16:33,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-09 17:16:33,796 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:33,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:33,826 INFO L225 Difference]: With dead ends: 18642 [2021-07-09 17:16:33,826 INFO L226 Difference]: Without dead ends: 18588 [2021-07-09 17:16:33,826 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 248.4ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:16:33,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18588 states. [2021-07-09 17:16:34,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18588 to 15189. [2021-07-09 17:16:34,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15189 states, 15188 states have (on average 2.568145904661575) internal successors, (39005), 15188 states have internal predecessors, (39005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:34,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 39005 transitions. [2021-07-09 17:16:34,081 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 39005 transitions. Word has length 59 [2021-07-09 17:16:34,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:34,081 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 39005 transitions. [2021-07-09 17:16:34,081 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:34,081 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 39005 transitions. [2021-07-09 17:16:34,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:34,094 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:34,094 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:34,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable932 [2021-07-09 17:16:34,310 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:34,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:34,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1443086082, now seen corresponding path program 273 times [2021-07-09 17:16:34,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:34,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993861363] [2021-07-09 17:16:34,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:34,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:34,386 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:34,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:34,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993861363] [2021-07-09 17:16:34,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993861363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:34,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291381256] [2021-07-09 17:16:34,387 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 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:34,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 17:16:34,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:34,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:34,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291381256] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:34,501 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:34,501 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:16:34,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440452505] [2021-07-09 17:16:34,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:34,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:34,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:34,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:34,501 INFO L87 Difference]: Start difference. First operand 15189 states and 39005 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:34,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:34,739 INFO L93 Difference]: Finished difference Result 17831 states and 43702 transitions. [2021-07-09 17:16:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:16:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:34,767 INFO L225 Difference]: With dead ends: 17831 [2021-07-09 17:16:34,767 INFO L226 Difference]: Without dead ends: 17807 [2021-07-09 17:16:34,767 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 86.4ms TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:34,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17807 states. [2021-07-09 17:16:35,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17807 to 15189. [2021-07-09 17:16:35,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15189 states, 15188 states have (on average 2.5672241243086646) internal successors, (38991), 15188 states have internal predecessors, (38991), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15189 states to 15189 states and 38991 transitions. [2021-07-09 17:16:35,102 INFO L78 Accepts]: Start accepts. Automaton has 15189 states and 38991 transitions. Word has length 59 [2021-07-09 17:16:35,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:35,102 INFO L482 AbstractCegarLoop]: Abstraction has 15189 states and 38991 transitions. [2021-07-09 17:16:35,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:35,102 INFO L276 IsEmpty]: Start isEmpty. Operand 15189 states and 38991 transitions. [2021-07-09 17:16:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:35,115 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:35,115 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:35,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:35,321 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:35,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:35,321 INFO L82 PathProgramCache]: Analyzing trace with hash 65363507, now seen corresponding path program 274 times [2021-07-09 17:16:35,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:35,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771878710] [2021-07-09 17:16:35,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:35,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:35,429 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:35,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:35,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771878710] [2021-07-09 17:16:35,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771878710] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:35,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [851785473] [2021-07-09 17:16:35,429 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 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:35,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:35,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:35,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:35,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:35,535 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:35,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [851785473] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:35,535 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:35,535 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:16:35,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690821987] [2021-07-09 17:16:35,535 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:35,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:35,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:35,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:35,535 INFO L87 Difference]: Start difference. First operand 15189 states and 38991 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:36,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:36,545 INFO L93 Difference]: Finished difference Result 23093 states and 55993 transitions. [2021-07-09 17:16:36,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-09 17:16:36,545 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:36,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:36,589 INFO L225 Difference]: With dead ends: 23093 [2021-07-09 17:16:36,589 INFO L226 Difference]: Without dead ends: 22913 [2021-07-09 17:16:36,589 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 393.8ms TimeCoverageRelationStatistics Valid=231, Invalid=1749, Unknown=0, NotChecked=0, Total=1980 [2021-07-09 17:16:36,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22913 states. [2021-07-09 17:16:36,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22913 to 15680. [2021-07-09 17:16:36,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15680 states, 15679 states have (on average 2.568403597168187) internal successors, (40270), 15679 states have internal predecessors, (40270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40270 transitions. [2021-07-09 17:16:36,960 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40270 transitions. Word has length 59 [2021-07-09 17:16:36,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:36,960 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40270 transitions. [2021-07-09 17:16:36,961 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40270 transitions. [2021-07-09 17:16:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:36,976 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:36,976 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:37,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable937,454 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:37,193 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:37,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:37,193 INFO L82 PathProgramCache]: Analyzing trace with hash 451966184, now seen corresponding path program 275 times [2021-07-09 17:16:37,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:37,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229869612] [2021-07-09 17:16:37,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:37,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:37,307 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:37,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:37,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229869612] [2021-07-09 17:16:37,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229869612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:37,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565689376] [2021-07-09 17:16:37,307 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 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:37,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:16:37,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:37,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:37,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 46 proven. 132 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:37,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1565689376] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:37,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:37,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 17 [2021-07-09 17:16:37,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699488609] [2021-07-09 17:16:37,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:16:37,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:37,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:16:37,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:16:37,450 INFO L87 Difference]: Start difference. First operand 15680 states and 40270 transitions. Second operand has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:37,819 INFO L93 Difference]: Finished difference Result 18578 states and 45476 transitions. [2021-07-09 17:16:37,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:16:37,819 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:37,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:37,850 INFO L225 Difference]: With dead ends: 18578 [2021-07-09 17:16:37,850 INFO L226 Difference]: Without dead ends: 18545 [2021-07-09 17:16:37,850 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 137.2ms TimeCoverageRelationStatistics Valid=127, Invalid=335, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:16:37,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18545 states. [2021-07-09 17:16:38,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18545 to 15680. [2021-07-09 17:16:38,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15680 states, 15679 states have (on average 2.567829580968174) internal successors, (40261), 15679 states have internal predecessors, (40261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:38,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15680 states to 15680 states and 40261 transitions. [2021-07-09 17:16:38,139 INFO L78 Accepts]: Start accepts. Automaton has 15680 states and 40261 transitions. Word has length 59 [2021-07-09 17:16:38,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:38,139 INFO L482 AbstractCegarLoop]: Abstraction has 15680 states and 40261 transitions. [2021-07-09 17:16:38,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.388888888888889) internal successors, (79), 17 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:38,139 INFO L276 IsEmpty]: Start isEmpty. Operand 15680 states and 40261 transitions. [2021-07-09 17:16:38,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:38,152 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:38,152 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:38,362 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:38,362 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:38,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:38,363 INFO L82 PathProgramCache]: Analyzing trace with hash 5671997, now seen corresponding path program 276 times [2021-07-09 17:16:38,363 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:38,363 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845234655] [2021-07-09 17:16:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:38,471 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:38,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:38,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845234655] [2021-07-09 17:16:38,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845234655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:38,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083032607] [2021-07-09 17:16:38,472 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 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:38,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-09 17:16:38,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:38,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:38,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:38,577 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:38,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083032607] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:38,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:38,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:16:38,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830613307] [2021-07-09 17:16:38,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:38,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:38,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:38,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:38,578 INFO L87 Difference]: Start difference. First operand 15680 states and 40261 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:40,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:40,121 INFO L93 Difference]: Finished difference Result 28722 states and 68889 transitions. [2021-07-09 17:16:40,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-07-09 17:16:40,122 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:40,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:40,171 INFO L225 Difference]: With dead ends: 28722 [2021-07-09 17:16:40,171 INFO L226 Difference]: Without dead ends: 28446 [2021-07-09 17:16:40,172 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1479 ImplicationChecksByTransitivity, 779.9ms TimeCoverageRelationStatistics Valid=501, Invalid=4191, Unknown=0, NotChecked=0, Total=4692 [2021-07-09 17:16:40,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28446 states. [2021-07-09 17:16:40,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28446 to 16072. [2021-07-09 17:16:40,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16072 states, 16071 states have (on average 2.5689129487897455) internal successors, (41285), 16071 states have internal predecessors, (41285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:40,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16072 states to 16072 states and 41285 transitions. [2021-07-09 17:16:40,538 INFO L78 Accepts]: Start accepts. Automaton has 16072 states and 41285 transitions. Word has length 59 [2021-07-09 17:16:40,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:40,538 INFO L482 AbstractCegarLoop]: Abstraction has 16072 states and 41285 transitions. [2021-07-09 17:16:40,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:40,539 INFO L276 IsEmpty]: Start isEmpty. Operand 16072 states and 41285 transitions. [2021-07-09 17:16:40,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:40,552 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:40,552 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:40,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable943 [2021-07-09 17:16:40,765 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:40,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:40,765 INFO L82 PathProgramCache]: Analyzing trace with hash 1899244866, now seen corresponding path program 277 times [2021-07-09 17:16:40,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:40,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791539476] [2021-07-09 17:16:40,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:40,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:40,857 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:40,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:40,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791539476] [2021-07-09 17:16:40,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1791539476] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:40,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856654028] [2021-07-09 17:16:40,857 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 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:40,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:40,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:40,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:40,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856654028] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:40,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:40,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:16:40,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909359149] [2021-07-09 17:16:40,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:40,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:40,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:40,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:40,967 INFO L87 Difference]: Start difference. First operand 16072 states and 41285 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:41,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:41,234 INFO L93 Difference]: Finished difference Result 18886 states and 46305 transitions. [2021-07-09 17:16:41,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:16:41,234 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:41,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:41,266 INFO L225 Difference]: With dead ends: 18886 [2021-07-09 17:16:41,266 INFO L226 Difference]: Without dead ends: 18844 [2021-07-09 17:16:41,267 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 121.0ms TimeCoverageRelationStatistics Valid=119, Invalid=261, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:16:41,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18844 states. [2021-07-09 17:16:41,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18844 to 15745. [2021-07-09 17:16:41,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15745 states, 15744 states have (on average 2.5645960365853657) internal successors, (40377), 15744 states have internal predecessors, (40377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:41,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15745 states to 15745 states and 40377 transitions. [2021-07-09 17:16:41,564 INFO L78 Accepts]: Start accepts. Automaton has 15745 states and 40377 transitions. Word has length 59 [2021-07-09 17:16:41,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:41,564 INFO L482 AbstractCegarLoop]: Abstraction has 15745 states and 40377 transitions. [2021-07-09 17:16:41,564 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:41,564 INFO L276 IsEmpty]: Start isEmpty. Operand 15745 states and 40377 transitions. [2021-07-09 17:16:41,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:41,577 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:41,577 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:41,792 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable944 [2021-07-09 17:16:41,793 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:41,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:41,793 INFO L82 PathProgramCache]: Analyzing trace with hash -147641869, now seen corresponding path program 278 times [2021-07-09 17:16:41,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:41,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690070636] [2021-07-09 17:16:41,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:41,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:41,920 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:41,920 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:41,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690070636] [2021-07-09 17:16:41,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690070636] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:41,920 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439341405] [2021-07-09 17:16:41,920 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 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:41,947 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:41,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:41,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:41,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:42,031 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:42,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439341405] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:42,031 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:42,031 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:16:42,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713213845] [2021-07-09 17:16:42,031 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:42,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:42,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:42,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:42,032 INFO L87 Difference]: Start difference. First operand 15745 states and 40377 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:42,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:42,959 INFO L93 Difference]: Finished difference Result 22153 states and 53662 transitions. [2021-07-09 17:16:42,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:16:42,960 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:42,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:42,994 INFO L225 Difference]: With dead ends: 22153 [2021-07-09 17:16:42,994 INFO L226 Difference]: Without dead ends: 21775 [2021-07-09 17:16:42,994 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 336.2ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:16:43,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21775 states. [2021-07-09 17:16:43,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21775 to 14506. [2021-07-09 17:16:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14506 states, 14505 states have (on average 2.5544295070665286) internal successors, (37052), 14505 states have internal predecessors, (37052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:43,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14506 states to 14506 states and 37052 transitions. [2021-07-09 17:16:43,256 INFO L78 Accepts]: Start accepts. Automaton has 14506 states and 37052 transitions. Word has length 59 [2021-07-09 17:16:43,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:43,257 INFO L482 AbstractCegarLoop]: Abstraction has 14506 states and 37052 transitions. [2021-07-09 17:16:43,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 14506 states and 37052 transitions. [2021-07-09 17:16:43,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:43,268 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:43,268 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:43,483 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable950 [2021-07-09 17:16:43,484 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:43,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:43,484 INFO L82 PathProgramCache]: Analyzing trace with hash -385703386, now seen corresponding path program 130 times [2021-07-09 17:16:43,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:43,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178858357] [2021-07-09 17:16:43,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:43,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 40 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:43,548 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:43,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178858357] [2021-07-09 17:16:43,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178858357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:43,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083553328] [2021-07-09 17:16:43,548 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 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:43,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:43,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:43,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:43,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:43,651 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:43,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083553328] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:43,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:43,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:16:43,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847613777] [2021-07-09 17:16:43,652 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:43,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:43,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:43,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=91, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:43,652 INFO L87 Difference]: Start difference. First operand 14506 states and 37052 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:43,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:43,900 INFO L93 Difference]: Finished difference Result 18216 states and 44603 transitions. [2021-07-09 17:16:43,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:16:43,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:43,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:43,927 INFO L225 Difference]: With dead ends: 18216 [2021-07-09 17:16:43,927 INFO L226 Difference]: Without dead ends: 18202 [2021-07-09 17:16:43,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 69.7ms TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:43,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18202 states. [2021-07-09 17:16:44,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18202 to 14941. [2021-07-09 17:16:44,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14941 states, 14940 states have (on average 2.5593038821954486) internal successors, (38236), 14940 states have internal predecessors, (38236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:44,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14941 states to 14941 states and 38236 transitions. [2021-07-09 17:16:44,163 INFO L78 Accepts]: Start accepts. Automaton has 14941 states and 38236 transitions. Word has length 59 [2021-07-09 17:16:44,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:44,164 INFO L482 AbstractCegarLoop]: Abstraction has 14941 states and 38236 transitions. [2021-07-09 17:16:44,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:44,164 INFO L276 IsEmpty]: Start isEmpty. Operand 14941 states and 38236 transitions. [2021-07-09 17:16:44,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:44,176 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:44,176 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:44,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable951,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:44,389 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:44,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:44,389 INFO L82 PathProgramCache]: Analyzing trace with hash -1007583796, now seen corresponding path program 131 times [2021-07-09 17:16:44,389 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:44,389 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [407429909] [2021-07-09 17:16:44,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:44,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:44,454 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 138 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:44,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:44,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [407429909] [2021-07-09 17:16:44,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [407429909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:44,455 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023983937] [2021-07-09 17:16:44,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:44,489 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-09 17:16:44,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:44,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:44,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 139 proven. 39 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:44,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023983937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:44,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:44,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-09 17:16:44,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50553557] [2021-07-09 17:16:44,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:44,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:44,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:44,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=123, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:44,602 INFO L87 Difference]: Start difference. First operand 14941 states and 38236 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:45,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:45,004 INFO L93 Difference]: Finished difference Result 23419 states and 56616 transitions. [2021-07-09 17:16:45,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:45,004 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:45,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:45,037 INFO L225 Difference]: With dead ends: 23419 [2021-07-09 17:16:45,037 INFO L226 Difference]: Without dead ends: 23419 [2021-07-09 17:16:45,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=162, Invalid=218, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:16:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23419 states. [2021-07-09 17:16:45,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23419 to 14952. [2021-07-09 17:16:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14952 states, 14951 states have (on average 2.5596281185205) internal successors, (38269), 14951 states have internal predecessors, (38269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:45,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14952 states to 14952 states and 38269 transitions. [2021-07-09 17:16:45,308 INFO L78 Accepts]: Start accepts. Automaton has 14952 states and 38269 transitions. Word has length 59 [2021-07-09 17:16:45,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:45,308 INFO L482 AbstractCegarLoop]: Abstraction has 14952 states and 38269 transitions. [2021-07-09 17:16:45,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:45,308 INFO L276 IsEmpty]: Start isEmpty. Operand 14952 states and 38269 transitions. [2021-07-09 17:16:45,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:45,321 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:45,321 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:45,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:45,537 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:45,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:45,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1649811044, now seen corresponding path program 132 times [2021-07-09 17:16:45,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:45,537 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060082694] [2021-07-09 17:16:45,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:45,609 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:45,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:45,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060082694] [2021-07-09 17:16:45,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060082694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:45,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224826173] [2021-07-09 17:16:45,609 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 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:45,642 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-07-09 17:16:45,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:45,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:45,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:45,732 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:45,732 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224826173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:45,732 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:45,732 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:16:45,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008195879] [2021-07-09 17:16:45,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:45,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:45,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:45,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=114, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:45,732 INFO L87 Difference]: Start difference. First operand 14952 states and 38269 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:46,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:46,070 INFO L93 Difference]: Finished difference Result 25599 states and 61804 transitions. [2021-07-09 17:16:46,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:46,071 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:46,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:46,111 INFO L225 Difference]: With dead ends: 25599 [2021-07-09 17:16:46,112 INFO L226 Difference]: Without dead ends: 25599 [2021-07-09 17:16:46,112 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 140.3ms TimeCoverageRelationStatistics Valid=203, Invalid=303, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:16:46,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25599 states. [2021-07-09 17:16:46,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25599 to 14991. [2021-07-09 17:16:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14991 states, 14990 states have (on average 2.561307538358906) internal successors, (38394), 14990 states have internal predecessors, (38394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:46,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14991 states to 14991 states and 38394 transitions. [2021-07-09 17:16:46,408 INFO L78 Accepts]: Start accepts. Automaton has 14991 states and 38394 transitions. Word has length 59 [2021-07-09 17:16:46,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:46,408 INFO L482 AbstractCegarLoop]: Abstraction has 14991 states and 38394 transitions. [2021-07-09 17:16:46,408 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:46,408 INFO L276 IsEmpty]: Start isEmpty. Operand 14991 states and 38394 transitions. [2021-07-09 17:16:46,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:46,421 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:46,421 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:46,638 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable954 [2021-07-09 17:16:46,638 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash -40184120, now seen corresponding path program 133 times [2021-07-09 17:16:46,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:46,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028204378] [2021-07-09 17:16:46,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:46,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 126 proven. 51 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:46,722 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:46,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028204378] [2021-07-09 17:16:46,723 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028204378] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:46,723 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482357521] [2021-07-09 17:16:46,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:46,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:46,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:46,839 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 127 proven. 51 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:46,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482357521] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:46,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:46,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-09 17:16:46,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202724735] [2021-07-09 17:16:46,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:46,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:46,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:46,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:46,840 INFO L87 Difference]: Start difference. First operand 14991 states and 38394 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:47,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:47,246 INFO L93 Difference]: Finished difference Result 25335 states and 61221 transitions. [2021-07-09 17:16:47,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:16:47,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:47,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:47,288 INFO L225 Difference]: With dead ends: 25335 [2021-07-09 17:16:47,289 INFO L226 Difference]: Without dead ends: 25335 [2021-07-09 17:16:47,289 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 173.5ms TimeCoverageRelationStatistics Valid=254, Invalid=396, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:47,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25335 states. [2021-07-09 17:16:47,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25335 to 15025. [2021-07-09 17:16:47,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15025 states, 15024 states have (on average 2.562433439829606) internal successors, (38498), 15024 states have internal predecessors, (38498), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15025 states to 15025 states and 38498 transitions. [2021-07-09 17:16:47,591 INFO L78 Accepts]: Start accepts. Automaton has 15025 states and 38498 transitions. Word has length 59 [2021-07-09 17:16:47,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:47,591 INFO L482 AbstractCegarLoop]: Abstraction has 15025 states and 38498 transitions. [2021-07-09 17:16:47,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:47,591 INFO L276 IsEmpty]: Start isEmpty. Operand 15025 states and 38498 transitions. [2021-07-09 17:16:47,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:47,604 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:47,604 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:47,819 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable955 [2021-07-09 17:16:47,819 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:47,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:47,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1079471132, now seen corresponding path program 134 times [2021-07-09 17:16:47,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:47,820 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043679334] [2021-07-09 17:16:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:47,915 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:47,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:47,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043679334] [2021-07-09 17:16:47,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043679334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:47,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005714047] [2021-07-09 17:16:47,916 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 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:47,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:47,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:47,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:47,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:48,033 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:48,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005714047] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:48,034 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:48,034 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-09 17:16:48,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885103107] [2021-07-09 17:16:48,034 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:48,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:48,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:48,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:48,034 INFO L87 Difference]: Start difference. First operand 15025 states and 38498 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:48,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:48,451 INFO L93 Difference]: Finished difference Result 22714 states and 55093 transitions. [2021-07-09 17:16:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:16:48,452 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:48,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:48,490 INFO L225 Difference]: With dead ends: 22714 [2021-07-09 17:16:48,490 INFO L226 Difference]: Without dead ends: 22714 [2021-07-09 17:16:48,490 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 186.1ms TimeCoverageRelationStatistics Valid=268, Invalid=434, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:16:48,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22714 states. [2021-07-09 17:16:48,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22714 to 15046. [2021-07-09 17:16:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15046 states, 15045 states have (on average 2.5626453971419076) internal successors, (38555), 15045 states have internal predecessors, (38555), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:48,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15046 states to 15046 states and 38555 transitions. [2021-07-09 17:16:48,776 INFO L78 Accepts]: Start accepts. Automaton has 15046 states and 38555 transitions. Word has length 59 [2021-07-09 17:16:48,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:48,776 INFO L482 AbstractCegarLoop]: Abstraction has 15046 states and 38555 transitions. [2021-07-09 17:16:48,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:48,776 INFO L276 IsEmpty]: Start isEmpty. Operand 15046 states and 38555 transitions. [2021-07-09 17:16:48,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:48,789 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:48,790 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:49,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable956,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:49,006 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:49,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:49,006 INFO L82 PathProgramCache]: Analyzing trace with hash -59608760, now seen corresponding path program 135 times [2021-07-09 17:16:49,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:49,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560218136] [2021-07-09 17:16:49,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:49,112 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 106 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:49,112 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:49,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560218136] [2021-07-09 17:16:49,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560218136] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:49,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872809340] [2021-07-09 17:16:49,112 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 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:49,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-07-09 17:16:49,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:49,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:49,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:49,240 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 107 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:49,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872809340] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:49,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:49,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-07-09 17:16:49,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684076446] [2021-07-09 17:16:49,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:16:49,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:49,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:16:49,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:16:49,240 INFO L87 Difference]: Start difference. First operand 15046 states and 38555 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:49,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:49,639 INFO L93 Difference]: Finished difference Result 18929 states and 46502 transitions. [2021-07-09 17:16:49,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:16:49,639 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:49,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:49,667 INFO L225 Difference]: With dead ends: 18929 [2021-07-09 17:16:49,668 INFO L226 Difference]: Without dead ends: 18929 [2021-07-09 17:16:49,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 188.1ms TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:16:49,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18929 states. [2021-07-09 17:16:49,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18929 to 14402. [2021-07-09 17:16:49,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 2.552669953475453) internal successors, (36761), 14401 states have internal predecessors, (36761), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:49,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36761 transitions. [2021-07-09 17:16:49,914 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36761 transitions. Word has length 59 [2021-07-09 17:16:49,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:49,914 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36761 transitions. [2021-07-09 17:16:49,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:49,914 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36761 transitions. [2021-07-09 17:16:49,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:49,926 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:49,926 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:50,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable957 [2021-07-09 17:16:50,143 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:50,143 INFO L82 PathProgramCache]: Analyzing trace with hash 601775784, now seen corresponding path program 279 times [2021-07-09 17:16:50,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:50,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673228452] [2021-07-09 17:16:50,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:50,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:50,244 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:50,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673228452] [2021-07-09 17:16:50,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673228452] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:50,244 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875693791] [2021-07-09 17:16:50,244 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 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:50,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-07-09 17:16:50,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:50,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:50,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:50,368 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 60 proven. 118 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:50,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [875693791] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:50,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:50,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-09 17:16:50,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714238853] [2021-07-09 17:16:50,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:16:50,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:50,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:16:50,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:50,369 INFO L87 Difference]: Start difference. First operand 14402 states and 36761 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:50,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:50,679 INFO L93 Difference]: Finished difference Result 16717 states and 40878 transitions. [2021-07-09 17:16:50,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:16:50,679 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:50,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:50,703 INFO L225 Difference]: With dead ends: 16717 [2021-07-09 17:16:50,703 INFO L226 Difference]: Without dead ends: 16672 [2021-07-09 17:16:50,703 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 143.4ms TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:16:50,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16672 states. [2021-07-09 17:16:50,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16672 to 14402. [2021-07-09 17:16:50,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14402 states, 14401 states have (on average 2.552044996875217) internal successors, (36752), 14401 states have internal predecessors, (36752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14402 states to 14402 states and 36752 transitions. [2021-07-09 17:16:50,949 INFO L78 Accepts]: Start accepts. Automaton has 14402 states and 36752 transitions. Word has length 59 [2021-07-09 17:16:50,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:50,949 INFO L482 AbstractCegarLoop]: Abstraction has 14402 states and 36752 transitions. [2021-07-09 17:16:50,949 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:50,949 INFO L276 IsEmpty]: Start isEmpty. Operand 14402 states and 36752 transitions. [2021-07-09 17:16:50,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:50,962 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:50,962 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:51,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable958,465 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:51,163 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:51,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:51,163 INFO L82 PathProgramCache]: Analyzing trace with hash 972677468, now seen corresponding path program 280 times [2021-07-09 17:16:51,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:51,163 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607300264] [2021-07-09 17:16:51,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:51,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:51,227 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:51,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607300264] [2021-07-09 17:16:51,227 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607300264] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:51,227 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971772619] [2021-07-09 17:16:51,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:51,257 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:51,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:51,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:51,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:51,340 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 66 proven. 108 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:51,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971772619] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:51,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:51,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:16:51,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415733962] [2021-07-09 17:16:51,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:16:51,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:51,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:16:51,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:16:51,341 INFO L87 Difference]: Start difference. First operand 14402 states and 36752 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:51,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:51,511 INFO L93 Difference]: Finished difference Result 17320 states and 42003 transitions. [2021-07-09 17:16:51,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:16:51,511 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:51,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:51,536 INFO L225 Difference]: With dead ends: 17320 [2021-07-09 17:16:51,537 INFO L226 Difference]: Without dead ends: 17317 [2021-07-09 17:16:51,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 57.4ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:51,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17317 states. [2021-07-09 17:16:51,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17317 to 14390. [2021-07-09 17:16:51,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14390 states, 14389 states have (on average 2.5509069428035303) internal successors, (36705), 14389 states have internal predecessors, (36705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:51,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36705 transitions. [2021-07-09 17:16:51,781 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36705 transitions. Word has length 59 [2021-07-09 17:16:51,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:51,781 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36705 transitions. [2021-07-09 17:16:51,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 10 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:51,781 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36705 transitions. [2021-07-09 17:16:51,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:51,796 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:51,796 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:52,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-07-09 17:16:52,017 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:52,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:52,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1179740034, now seen corresponding path program 281 times [2021-07-09 17:16:52,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:52,018 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000635624] [2021-07-09 17:16:52,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:52,099 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 115 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:52,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:52,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000635624] [2021-07-09 17:16:52,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000635624] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:52,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217888097] [2021-07-09 17:16:52,100 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 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:52,135 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-09 17:16:52,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:52,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:52,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 115 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:16:52,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217888097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:52,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:52,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 14 [2021-07-09 17:16:52,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147971010] [2021-07-09 17:16:52,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:16:52,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:52,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:16:52,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:16:52,236 INFO L87 Difference]: Start difference. First operand 14390 states and 36705 transitions. Second operand has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:52,508 INFO L93 Difference]: Finished difference Result 17479 states and 42286 transitions. [2021-07-09 17:16:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:16:52,509 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:52,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:52,535 INFO L225 Difference]: With dead ends: 17479 [2021-07-09 17:16:52,535 INFO L226 Difference]: Without dead ends: 17461 [2021-07-09 17:16:52,535 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:16:52,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17461 states. [2021-07-09 17:16:52,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17461 to 14390. [2021-07-09 17:16:52,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14390 states, 14389 states have (on average 2.549308499548266) internal successors, (36682), 14389 states have internal predecessors, (36682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:52,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14390 states to 14390 states and 36682 transitions. [2021-07-09 17:16:52,800 INFO L78 Accepts]: Start accepts. Automaton has 14390 states and 36682 transitions. Word has length 59 [2021-07-09 17:16:52,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:52,800 INFO L482 AbstractCegarLoop]: Abstraction has 14390 states and 36682 transitions. [2021-07-09 17:16:52,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.933333333333334) internal successors, (74), 14 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:52,801 INFO L276 IsEmpty]: Start isEmpty. Operand 14390 states and 36682 transitions. [2021-07-09 17:16:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:52,813 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:52,813 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:53,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable967,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:53,029 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:53,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:53,029 INFO L82 PathProgramCache]: Analyzing trace with hash -268259979, now seen corresponding path program 282 times [2021-07-09 17:16:53,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:53,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109748922] [2021-07-09 17:16:53,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:53,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:53,114 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:53,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109748922] [2021-07-09 17:16:53,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [109748922] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:53,114 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452157258] [2021-07-09 17:16:53,114 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 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:53,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-09 17:16:53,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:53,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:53,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:53,295 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:53,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [452157258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:53,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:53,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:16:53,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749874349] [2021-07-09 17:16:53,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:53,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:53,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:53,295 INFO L87 Difference]: Start difference. First operand 14390 states and 36682 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:54,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:54,187 INFO L93 Difference]: Finished difference Result 16064 states and 39766 transitions. [2021-07-09 17:16:54,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:54,187 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:54,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:54,209 INFO L225 Difference]: With dead ends: 16064 [2021-07-09 17:16:54,209 INFO L226 Difference]: Without dead ends: 15797 [2021-07-09 17:16:54,209 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 155.5ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:16:54,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15797 states. [2021-07-09 17:16:54,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15797 to 14403. [2021-07-09 17:16:54,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14403 states, 14402 states have (on average 2.540411054020275) internal successors, (36587), 14402 states have internal predecessors, (36587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:54,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14403 states to 14403 states and 36587 transitions. [2021-07-09 17:16:54,421 INFO L78 Accepts]: Start accepts. Automaton has 14403 states and 36587 transitions. Word has length 59 [2021-07-09 17:16:54,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:54,421 INFO L482 AbstractCegarLoop]: Abstraction has 14403 states and 36587 transitions. [2021-07-09 17:16:54,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:54,422 INFO L276 IsEmpty]: Start isEmpty. Operand 14403 states and 36587 transitions. [2021-07-09 17:16:54,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:54,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:54,434 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:54,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 468 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable970 [2021-07-09 17:16:54,650 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:54,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash -881796159, now seen corresponding path program 283 times [2021-07-09 17:16:54,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:54,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519009212] [2021-07-09 17:16:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:54,753 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:54,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:54,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519009212] [2021-07-09 17:16:54,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519009212] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:54,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860466149] [2021-07-09 17:16:54,754 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 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:54,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:54,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:54,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:54,865 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:16:54,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860466149] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:54,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:54,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:16:54,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329726585] [2021-07-09 17:16:54,865 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:16:54,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:54,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:16:54,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:16:54,866 INFO L87 Difference]: Start difference. First operand 14403 states and 36587 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:55,430 INFO L93 Difference]: Finished difference Result 16239 states and 40254 transitions. [2021-07-09 17:16:55,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:16:55,430 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:55,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:55,455 INFO L225 Difference]: With dead ends: 16239 [2021-07-09 17:16:55,455 INFO L226 Difference]: Without dead ends: 16227 [2021-07-09 17:16:55,455 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 160.4ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:16:55,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16227 states. [2021-07-09 17:16:55,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16227 to 14558. [2021-07-09 17:16:55,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14558 states, 14557 states have (on average 2.540221199422958) internal successors, (36978), 14557 states have internal predecessors, (36978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:55,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14558 states to 14558 states and 36978 transitions. [2021-07-09 17:16:55,679 INFO L78 Accepts]: Start accepts. Automaton has 14558 states and 36978 transitions. Word has length 59 [2021-07-09 17:16:55,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:55,679 INFO L482 AbstractCegarLoop]: Abstraction has 14558 states and 36978 transitions. [2021-07-09 17:16:55,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:55,679 INFO L276 IsEmpty]: Start isEmpty. Operand 14558 states and 36978 transitions. [2021-07-09 17:16:55,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:55,691 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:55,691 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:55,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable971,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:55,905 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:55,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:55,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1039095646, now seen corresponding path program 136 times [2021-07-09 17:16:55,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:55,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325447319] [2021-07-09 17:16:55,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:55,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:55,969 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 62 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:55,969 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:55,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325447319] [2021-07-09 17:16:55,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325447319] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:55,969 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090913346] [2021-07-09 17:16:55,969 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:55,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:55,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:55,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:55,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:16:56,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090913346] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:56,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:56,084 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:16:56,084 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965782513] [2021-07-09 17:16:56,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:56,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:56,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:56,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:56,085 INFO L87 Difference]: Start difference. First operand 14558 states and 36978 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:56,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:56,357 INFO L93 Difference]: Finished difference Result 17769 states and 43570 transitions. [2021-07-09 17:16:56,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:16:56,357 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:56,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:56,386 INFO L225 Difference]: With dead ends: 17769 [2021-07-09 17:16:56,387 INFO L226 Difference]: Without dead ends: 17739 [2021-07-09 17:16:56,387 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:56,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17739 states. [2021-07-09 17:16:56,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17739 to 15059. [2021-07-09 17:16:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15059 states, 15058 states have (on average 2.5455571789082216) internal successors, (38331), 15058 states have internal predecessors, (38331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15059 states to 15059 states and 38331 transitions. [2021-07-09 17:16:56,632 INFO L78 Accepts]: Start accepts. Automaton has 15059 states and 38331 transitions. Word has length 59 [2021-07-09 17:16:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:56,632 INFO L482 AbstractCegarLoop]: Abstraction has 15059 states and 38331 transitions. [2021-07-09 17:16:56,633 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 15059 states and 38331 transitions. [2021-07-09 17:16:56,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:56,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:56,645 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:56,861 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable972 [2021-07-09 17:16:56,862 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:56,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:56,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1260121175, now seen corresponding path program 284 times [2021-07-09 17:16:56,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:56,862 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555722961] [2021-07-09 17:16:56,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:56,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:56,953 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:56,953 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:56,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555722961] [2021-07-09 17:16:56,953 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555722961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:56,953 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105539954] [2021-07-09 17:16:56,953 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 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:56,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:16:56,983 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:56,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:56,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:57,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105539954] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:57,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:57,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:16:57,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177580029] [2021-07-09 17:16:57,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:57,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:57,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:57,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:57,066 INFO L87 Difference]: Start difference. First operand 15059 states and 38331 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:57,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:57,947 INFO L93 Difference]: Finished difference Result 19111 states and 46968 transitions. [2021-07-09 17:16:57,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-07-09 17:16:57,947 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:57,977 INFO L225 Difference]: With dead ends: 19111 [2021-07-09 17:16:57,977 INFO L226 Difference]: Without dead ends: 19057 [2021-07-09 17:16:57,977 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 272.5ms TimeCoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:16:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19057 states. [2021-07-09 17:16:58,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19057 to 15532. [2021-07-09 17:16:58,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15532 states, 15531 states have (on average 2.551155753010109) internal successors, (39622), 15531 states have internal predecessors, (39622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:58,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39622 transitions. [2021-07-09 17:16:58,239 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39622 transitions. Word has length 59 [2021-07-09 17:16:58,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:58,239 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39622 transitions. [2021-07-09 17:16:58,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:58,239 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39622 transitions. [2021-07-09 17:16:58,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:58,251 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:58,251 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:58,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-07-09 17:16:58,467 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:58,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:58,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1502287012, now seen corresponding path program 285 times [2021-07-09 17:16:58,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:58,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872687806] [2021-07-09 17:16:58,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:58,541 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:58,541 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:58,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872687806] [2021-07-09 17:16:58,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872687806] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:58,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744243860] [2021-07-09 17:16:58,541 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 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:58,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 17:16:58,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:58,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:16:58,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:58,657 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 48 proven. 129 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:16:58,657 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [744243860] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:58,657 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:58,657 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:16:58,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823340118] [2021-07-09 17:16:58,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:16:58,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:58,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:16:58,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:16:58,658 INFO L87 Difference]: Start difference. First operand 15532 states and 39622 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:58,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:16:58,893 INFO L93 Difference]: Finished difference Result 18411 states and 44785 transitions. [2021-07-09 17:16:58,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:16:58,893 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:16:58,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:16:58,921 INFO L225 Difference]: With dead ends: 18411 [2021-07-09 17:16:58,922 INFO L226 Difference]: Without dead ends: 18387 [2021-07-09 17:16:58,922 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:16:58,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18387 states. [2021-07-09 17:16:59,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18387 to 15532. [2021-07-09 17:16:59,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15532 states, 15531 states have (on average 2.54993239327796) internal successors, (39603), 15531 states have internal predecessors, (39603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:59,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15532 states to 15532 states and 39603 transitions. [2021-07-09 17:16:59,185 INFO L78 Accepts]: Start accepts. Automaton has 15532 states and 39603 transitions. Word has length 59 [2021-07-09 17:16:59,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:16:59,185 INFO L482 AbstractCegarLoop]: Abstraction has 15532 states and 39603 transitions. [2021-07-09 17:16:59,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:16:59,185 INFO L276 IsEmpty]: Start isEmpty. Operand 15532 states and 39603 transitions. [2021-07-09 17:16:59,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:16:59,198 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:16:59,198 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:16:59,414 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 472 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable976 [2021-07-09 17:16:59,414 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:16:59,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:16:59,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1414957709, now seen corresponding path program 286 times [2021-07-09 17:16:59,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:16:59,415 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252153496] [2021-07-09 17:16:59,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:16:59,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:16:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:59,517 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:16:59,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252153496] [2021-07-09 17:16:59,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252153496] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:59,517 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940460740] [2021-07-09 17:16:59,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:16:59,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:16:59,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:16:59,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:16:59,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:16:59,630 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:16:59,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940460740] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:16:59,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:16:59,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:16:59,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536351343] [2021-07-09 17:16:59,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:16:59,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:16:59,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:16:59,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:16:59,631 INFO L87 Difference]: Start difference. First operand 15532 states and 39603 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:00,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:00,882 INFO L93 Difference]: Finished difference Result 24361 states and 58995 transitions. [2021-07-09 17:17:00,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-07-09 17:17:00,882 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:00,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:00,922 INFO L225 Difference]: With dead ends: 24361 [2021-07-09 17:17:00,922 INFO L226 Difference]: Without dead ends: 24193 [2021-07-09 17:17:00,923 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 519.9ms TimeCoverageRelationStatistics Valid=279, Invalid=2271, Unknown=0, NotChecked=0, Total=2550 [2021-07-09 17:17:00,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24193 states. [2021-07-09 17:17:01,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24193 to 16448. [2021-07-09 17:17:01,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16448 states, 16447 states have (on average 2.5559676536754425) internal successors, (42038), 16447 states have internal predecessors, (42038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:01,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42038 transitions. [2021-07-09 17:17:01,244 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42038 transitions. Word has length 59 [2021-07-09 17:17:01,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:01,244 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42038 transitions. [2021-07-09 17:17:01,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:01,244 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42038 transitions. [2021-07-09 17:17:01,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:01,257 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:01,257 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:01,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:01,474 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:01,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:01,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1801560386, now seen corresponding path program 287 times [2021-07-09 17:17:01,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:01,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099720815] [2021-07-09 17:17:01,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:01,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:01,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:01,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099720815] [2021-07-09 17:17:01,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099720815] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:01,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200723470] [2021-07-09 17:17:01,557 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:01,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 17:17:01,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:01,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:01,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:01,691 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 43 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:01,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200723470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:01,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:01,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 16 [2021-07-09 17:17:01,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539264983] [2021-07-09 17:17:01,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:17:01,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:01,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:17:01,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:17:01,692 INFO L87 Difference]: Start difference. First operand 16448 states and 42038 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:02,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:02,018 INFO L93 Difference]: Finished difference Result 19584 states and 47707 transitions. [2021-07-09 17:17:02,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:17:02,018 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:02,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:02,047 INFO L225 Difference]: With dead ends: 19584 [2021-07-09 17:17:02,048 INFO L226 Difference]: Without dead ends: 19551 [2021-07-09 17:17:02,048 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 128.0ms TimeCoverageRelationStatistics Valid=122, Invalid=298, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:17:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19551 states. [2021-07-09 17:17:02,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19551 to 16448. [2021-07-09 17:17:02,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16448 states, 16447 states have (on average 2.5550556332461847) internal successors, (42023), 16447 states have internal predecessors, (42023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:02,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16448 states to 16448 states and 42023 transitions. [2021-07-09 17:17:02,322 INFO L78 Accepts]: Start accepts. Automaton has 16448 states and 42023 transitions. Word has length 59 [2021-07-09 17:17:02,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:02,323 INFO L482 AbstractCegarLoop]: Abstraction has 16448 states and 42023 transitions. [2021-07-09 17:17:02,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:02,323 INFO L276 IsEmpty]: Start isEmpty. Operand 16448 states and 42023 transitions. [2021-07-09 17:17:02,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:02,335 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:02,335 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:02,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable981 [2021-07-09 17:17:02,551 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:02,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:02,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1355266199, now seen corresponding path program 288 times [2021-07-09 17:17:02,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:02,551 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385153308] [2021-07-09 17:17:02,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:02,663 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:02,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:02,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385153308] [2021-07-09 17:17:02,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385153308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:02,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322442767] [2021-07-09 17:17:02,664 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 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:02,698 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-09 17:17:02,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:02,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:02,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:02,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322442767] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:02,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:02,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:02,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599453123] [2021-07-09 17:17:02,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:02,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:02,782 INFO L87 Difference]: Start difference. First operand 16448 states and 42023 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:03,792 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-07-09 17:17:04,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:04,702 INFO L93 Difference]: Finished difference Result 35626 states and 84935 transitions. [2021-07-09 17:17:04,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-07-09 17:17:04,702 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:04,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:04,761 INFO L225 Difference]: With dead ends: 35626 [2021-07-09 17:17:04,761 INFO L226 Difference]: Without dead ends: 35104 [2021-07-09 17:17:04,761 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 1072.1ms TimeCoverageRelationStatistics Valid=657, Invalid=6149, Unknown=0, NotChecked=0, Total=6806 [2021-07-09 17:17:04,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35104 states. [2021-07-09 17:17:05,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35104 to 17932. [2021-07-09 17:17:05,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17932 states, 17931 states have (on average 2.560760693770565) internal successors, (45917), 17931 states have internal predecessors, (45917), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45917 transitions. [2021-07-09 17:17:05,168 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45917 transitions. Word has length 59 [2021-07-09 17:17:05,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:05,168 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45917 transitions. [2021-07-09 17:17:05,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:05,169 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45917 transitions. [2021-07-09 17:17:05,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:05,182 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:05,182 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:05,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:05,398 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:05,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:05,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1046128228, now seen corresponding path program 289 times [2021-07-09 17:17:05,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:05,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025609255] [2021-07-09 17:17:05,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:05,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:05,493 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:05,493 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025609255] [2021-07-09 17:17:05,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025609255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:05,494 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450809034] [2021-07-09 17:17:05,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:05,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:05,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:05,608 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 44 proven. 133 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:05,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450809034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:05,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:05,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:17:05,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376965844] [2021-07-09 17:17:05,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:05,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:05,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:05,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:05,609 INFO L87 Difference]: Start difference. First operand 17932 states and 45917 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:05,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:05,886 INFO L93 Difference]: Finished difference Result 21190 states and 51795 transitions. [2021-07-09 17:17:05,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:17:05,887 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:05,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:05,921 INFO L225 Difference]: With dead ends: 21190 [2021-07-09 17:17:05,921 INFO L226 Difference]: Without dead ends: 21148 [2021-07-09 17:17:05,921 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=124, Invalid=256, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:17:05,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21148 states. [2021-07-09 17:17:06,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21148 to 17932. [2021-07-09 17:17:06,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17932 states, 17931 states have (on average 2.5599241537002957) internal successors, (45902), 17931 states have internal predecessors, (45902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:06,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17932 states to 17932 states and 45902 transitions. [2021-07-09 17:17:06,246 INFO L78 Accepts]: Start accepts. Automaton has 17932 states and 45902 transitions. Word has length 59 [2021-07-09 17:17:06,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:06,246 INFO L482 AbstractCegarLoop]: Abstraction has 17932 states and 45902 transitions. [2021-07-09 17:17:06,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:06,246 INFO L276 IsEmpty]: Start isEmpty. Operand 17932 states and 45902 transitions. [2021-07-09 17:17:06,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:06,261 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:06,261 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:06,477 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable987 [2021-07-09 17:17:06,477 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:06,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:06,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1201952333, now seen corresponding path program 290 times [2021-07-09 17:17:06,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:06,478 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729962616] [2021-07-09 17:17:06,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:06,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:06,601 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:06,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:06,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729962616] [2021-07-09 17:17:06,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729962616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:06,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390360272] [2021-07-09 17:17:06,602 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 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:06,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:06,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:06,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:06,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:06,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390360272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:06,715 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:06,715 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:17:06,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614443520] [2021-07-09 17:17:06,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:06,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:06,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:06,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:06,716 INFO L87 Difference]: Start difference. First operand 17932 states and 45902 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:09,504 INFO L93 Difference]: Finished difference Result 45251 states and 107889 transitions. [2021-07-09 17:17:09,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-07-09 17:17:09,504 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:09,585 INFO L225 Difference]: With dead ends: 45251 [2021-07-09 17:17:09,585 INFO L226 Difference]: Without dead ends: 44633 [2021-07-09 17:17:09,587 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6679 ImplicationChecksByTransitivity, 1808.0ms TimeCoverageRelationStatistics Valid=1467, Invalid=15563, Unknown=0, NotChecked=0, Total=17030 [2021-07-09 17:17:09,629 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44633 states. [2021-07-09 17:17:10,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44633 to 19324. [2021-07-09 17:17:10,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19324 states, 19323 states have (on average 2.5631630699166794) internal successors, (49528), 19323 states have internal predecessors, (49528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:10,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19324 states to 19324 states and 49528 transitions. [2021-07-09 17:17:10,122 INFO L78 Accepts]: Start accepts. Automaton has 19324 states and 49528 transitions. Word has length 59 [2021-07-09 17:17:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:10,122 INFO L482 AbstractCegarLoop]: Abstraction has 19324 states and 49528 transitions. [2021-07-09 17:17:10,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 19324 states and 49528 transitions. [2021-07-09 17:17:10,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:10,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:10,135 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:10,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 477 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable993 [2021-07-09 17:17:10,351 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:10,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:10,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1951369986, now seen corresponding path program 291 times [2021-07-09 17:17:10,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:10,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598351882] [2021-07-09 17:17:10,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:10,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:10,457 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:10,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598351882] [2021-07-09 17:17:10,457 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1598351882] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:10,457 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977973082] [2021-07-09 17:17:10,457 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:10,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:17:10,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:10,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:10,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:10,574 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 51 proven. 126 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:10,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977973082] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:10,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:10,574 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-09 17:17:10,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164186302] [2021-07-09 17:17:10,574 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:10,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:10,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:10,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:10,575 INFO L87 Difference]: Start difference. First operand 19324 states and 49528 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:10,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:10,872 INFO L93 Difference]: Finished difference Result 22688 states and 55618 transitions. [2021-07-09 17:17:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:17:10,872 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:10,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:10,909 INFO L225 Difference]: With dead ends: 22688 [2021-07-09 17:17:10,909 INFO L226 Difference]: Without dead ends: 22637 [2021-07-09 17:17:10,909 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 143.8ms TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:17:10,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22637 states. [2021-07-09 17:17:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22637 to 18993. [2021-07-09 17:17:11,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18993 states, 18992 states have (on average 2.5599726200505475) internal successors, (48619), 18992 states have internal predecessors, (48619), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18993 states to 18993 states and 48619 transitions. [2021-07-09 17:17:11,246 INFO L78 Accepts]: Start accepts. Automaton has 18993 states and 48619 transitions. Word has length 59 [2021-07-09 17:17:11,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:11,246 INFO L482 AbstractCegarLoop]: Abstraction has 18993 states and 48619 transitions. [2021-07-09 17:17:11,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:11,246 INFO L276 IsEmpty]: Start isEmpty. Operand 18993 states and 48619 transitions. [2021-07-09 17:17:11,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:11,260 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:11,260 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:11,479 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 478 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-07-09 17:17:11,479 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:11,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:11,480 INFO L82 PathProgramCache]: Analyzing trace with hash -621194025, now seen corresponding path program 292 times [2021-07-09 17:17:11,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:11,480 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176465012] [2021-07-09 17:17:11,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:11,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:11,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176465012] [2021-07-09 17:17:11,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176465012] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:11,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285938355] [2021-07-09 17:17:11,618 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 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:11,646 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:11,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:11,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:11,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:11,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285938355] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:11,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:11,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-09 17:17:11,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013243068] [2021-07-09 17:17:11,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:17:11,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:11,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:17:11,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:17:11,729 INFO L87 Difference]: Start difference. First operand 18993 states and 48619 transitions. Second operand has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:12,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:12,681 INFO L93 Difference]: Finished difference Result 27005 states and 64480 transitions. [2021-07-09 17:17:12,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:12,681 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:12,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:12,724 INFO L225 Difference]: With dead ends: 27005 [2021-07-09 17:17:12,724 INFO L226 Difference]: Without dead ends: 26165 [2021-07-09 17:17:12,725 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 390.9ms TimeCoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:17:12,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26165 states. [2021-07-09 17:17:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26165 to 14615. [2021-07-09 17:17:12,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14614 states have (on average 2.5288764198713563) internal successors, (36957), 14614 states have internal predecessors, (36957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:13,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36957 transitions. [2021-07-09 17:17:13,023 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36957 transitions. Word has length 59 [2021-07-09 17:17:13,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:13,023 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36957 transitions. [2021-07-09 17:17:13,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.5294117647058822) internal successors, (60), 16 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:13,024 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36957 transitions. [2021-07-09 17:17:13,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:13,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:13,036 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:13,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1001 [2021-07-09 17:17:13,252 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:13,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:13,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1481135952, now seen corresponding path program 137 times [2021-07-09 17:17:13,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:13,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202539363] [2021-07-09 17:17:13,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:13,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 41 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:13,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:13,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202539363] [2021-07-09 17:17:13,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202539363] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:13,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825409154] [2021-07-09 17:17:13,319 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 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:13,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-07-09 17:17:13,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:13,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:13,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:13,459 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 137 proven. 41 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:13,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825409154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:13,459 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:13,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-09 17:17:13,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615591508] [2021-07-09 17:17:13,460 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:13,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:13,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:13,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:13,460 INFO L87 Difference]: Start difference. First operand 14615 states and 36957 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:13,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:13,840 INFO L93 Difference]: Finished difference Result 22169 states and 53449 transitions. [2021-07-09 17:17:13,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:17:13,841 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:13,875 INFO L225 Difference]: With dead ends: 22169 [2021-07-09 17:17:13,875 INFO L226 Difference]: Without dead ends: 22169 [2021-07-09 17:17:13,875 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 189.1ms TimeCoverageRelationStatistics Valid=180, Invalid=240, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:17:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22169 states. [2021-07-09 17:17:14,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22169 to 14758. [2021-07-09 17:17:14,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14758 states, 14757 states have (on average 2.533035169749949) internal successors, (37380), 14757 states have internal predecessors, (37380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:14,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14758 states to 14758 states and 37380 transitions. [2021-07-09 17:17:14,163 INFO L78 Accepts]: Start accepts. Automaton has 14758 states and 37380 transitions. Word has length 59 [2021-07-09 17:17:14,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:14,163 INFO L482 AbstractCegarLoop]: Abstraction has 14758 states and 37380 transitions. [2021-07-09 17:17:14,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:14,163 INFO L276 IsEmpty]: Start isEmpty. Operand 14758 states and 37380 transitions. [2021-07-09 17:17:14,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:14,178 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:14,178 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:14,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1002 [2021-07-09 17:17:14,393 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:14,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:14,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1176258888, now seen corresponding path program 138 times [2021-07-09 17:17:14,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:14,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268022597] [2021-07-09 17:17:14,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:14,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:14,469 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 135 proven. 42 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:14,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:14,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268022597] [2021-07-09 17:17:14,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268022597] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:14,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700261457] [2021-07-09 17:17:14,470 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 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:14,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-09 17:17:14,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:14,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:14,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:14,592 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 136 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:14,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700261457] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:14,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:14,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:17:14,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623154677] [2021-07-09 17:17:14,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:14,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:14,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:14,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=113, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:14,592 INFO L87 Difference]: Start difference. First operand 14758 states and 37380 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:14,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:14,962 INFO L93 Difference]: Finished difference Result 24727 states and 59450 transitions. [2021-07-09 17:17:14,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:17:14,962 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:14,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:15,001 INFO L225 Difference]: With dead ends: 24727 [2021-07-09 17:17:15,001 INFO L226 Difference]: Without dead ends: 24727 [2021-07-09 17:17:15,002 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:17:15,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24727 states. [2021-07-09 17:17:15,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24727 to 14806. [2021-07-09 17:17:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14806 states, 14805 states have (on average 2.534481594056062) internal successors, (37523), 14805 states have internal predecessors, (37523), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:15,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14806 states to 14806 states and 37523 transitions. [2021-07-09 17:17:15,278 INFO L78 Accepts]: Start accepts. Automaton has 14806 states and 37523 transitions. Word has length 59 [2021-07-09 17:17:15,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:15,278 INFO L482 AbstractCegarLoop]: Abstraction has 14806 states and 37523 transitions. [2021-07-09 17:17:15,278 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:15,278 INFO L276 IsEmpty]: Start isEmpty. Operand 14806 states and 37523 transitions. [2021-07-09 17:17:15,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:15,290 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:15,290 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:15,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1003,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:15,506 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:15,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:15,506 INFO L82 PathProgramCache]: Analyzing trace with hash -513736276, now seen corresponding path program 139 times [2021-07-09 17:17:15,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:15,506 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974343717] [2021-07-09 17:17:15,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:15,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:15,591 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:15,591 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:15,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974343717] [2021-07-09 17:17:15,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974343717] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:15,591 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29734649] [2021-07-09 17:17:15,591 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 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:15,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:15,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:15,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:15,708 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:15,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29734649] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:15,709 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:15,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-09 17:17:15,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323849913] [2021-07-09 17:17:15,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:15,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:15,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:15,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:15,709 INFO L87 Difference]: Start difference. First operand 14806 states and 37523 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:16,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:16,160 INFO L93 Difference]: Finished difference Result 25465 states and 61218 transitions. [2021-07-09 17:17:16,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:16,161 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:16,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:16,214 INFO L225 Difference]: With dead ends: 25465 [2021-07-09 17:17:16,214 INFO L226 Difference]: Without dead ends: 25465 [2021-07-09 17:17:16,214 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 207.6ms TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:17:16,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25465 states. [2021-07-09 17:17:16,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25465 to 14863. [2021-07-09 17:17:16,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14863 states, 14862 states have (on average 2.5361997039429416) internal successors, (37693), 14862 states have internal predecessors, (37693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:16,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14863 states to 14863 states and 37693 transitions. [2021-07-09 17:17:16,533 INFO L78 Accepts]: Start accepts. Automaton has 14863 states and 37693 transitions. Word has length 59 [2021-07-09 17:17:16,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:16,533 INFO L482 AbstractCegarLoop]: Abstraction has 14863 states and 37693 transitions. [2021-07-09 17:17:16,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:16,533 INFO L276 IsEmpty]: Start isEmpty. Operand 14863 states and 37693 transitions. [2021-07-09 17:17:16,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:16,548 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:16,548 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:16,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 482 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-07-09 17:17:16,765 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:16,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -1553023288, now seen corresponding path program 140 times [2021-07-09 17:17:16,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:16,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157526928] [2021-07-09 17:17:16,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:16,863 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:16,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:16,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157526928] [2021-07-09 17:17:16,863 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [157526928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:16,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686553799] [2021-07-09 17:17:16,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:16,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:16,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:16,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:16,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:16,982 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 122 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:16,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686553799] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:16,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:16,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-09 17:17:16,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642703997] [2021-07-09 17:17:16,982 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:16,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:16,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:16,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:16,982 INFO L87 Difference]: Start difference. First operand 14863 states and 37693 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:17,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:17,469 INFO L93 Difference]: Finished difference Result 24352 states and 58685 transitions. [2021-07-09 17:17:17,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:17,470 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:17,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:17,513 INFO L225 Difference]: With dead ends: 24352 [2021-07-09 17:17:17,513 INFO L226 Difference]: Without dead ends: 24352 [2021-07-09 17:17:17,513 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 240.5ms TimeCoverageRelationStatistics Valid=355, Invalid=575, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:17:17,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24352 states. [2021-07-09 17:17:17,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24352 to 14909. [2021-07-09 17:17:17,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14909 states, 14908 states have (on average 2.5376978803327073) internal successors, (37832), 14908 states have internal predecessors, (37832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:17,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14909 states to 14909 states and 37832 transitions. [2021-07-09 17:17:17,799 INFO L78 Accepts]: Start accepts. Automaton has 14909 states and 37832 transitions. Word has length 59 [2021-07-09 17:17:17,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:17,799 INFO L482 AbstractCegarLoop]: Abstraction has 14909 states and 37832 transitions. [2021-07-09 17:17:17,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 14909 states and 37832 transitions. [2021-07-09 17:17:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:17,812 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:17,812 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:18,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1005,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:18,028 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:18,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:18,028 INFO L82 PathProgramCache]: Analyzing trace with hash -533160916, now seen corresponding path program 141 times [2021-07-09 17:17:18,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:18,028 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519814401] [2021-07-09 17:17:18,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:18,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 63 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:18,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:18,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519814401] [2021-07-09 17:17:18,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519814401] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:18,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538138169] [2021-07-09 17:17:18,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:18,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-07-09 17:17:18,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:18,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:17:18,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:18,325 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 144 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:18,325 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538138169] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:18,325 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:18,325 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 21 [2021-07-09 17:17:18,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529252978] [2021-07-09 17:17:18,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:17:18,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:18,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:17:18,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=308, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:17:18,326 INFO L87 Difference]: Start difference. First operand 14909 states and 37832 transitions. Second operand has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:18,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:18,763 INFO L93 Difference]: Finished difference Result 17503 states and 42817 transitions. [2021-07-09 17:17:18,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:17:18,764 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:18,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:18,794 INFO L225 Difference]: With dead ends: 17503 [2021-07-09 17:17:18,794 INFO L226 Difference]: Without dead ends: 17503 [2021-07-09 17:17:18,794 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 232.5ms TimeCoverageRelationStatistics Valid=266, Invalid=490, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:17:18,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17503 states. [2021-07-09 17:17:18,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17503 to 14273. [2021-07-09 17:17:18,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 2.5301289237668163) internal successors, (36110), 14272 states have internal predecessors, (36110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:19,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36110 transitions. [2021-07-09 17:17:19,024 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36110 transitions. Word has length 59 [2021-07-09 17:17:19,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:19,024 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36110 transitions. [2021-07-09 17:17:19,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.409090909090909) internal successors, (75), 21 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:19,024 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36110 transitions. [2021-07-09 17:17:19,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:19,036 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:19,036 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:19,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1006 [2021-07-09 17:17:19,252 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:19,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:19,252 INFO L82 PathProgramCache]: Analyzing trace with hash -539355172, now seen corresponding path program 293 times [2021-07-09 17:17:19,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:19,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996678185] [2021-07-09 17:17:19,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:19,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:19,377 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:19,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:19,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996678185] [2021-07-09 17:17:19,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996678185] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:19,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515608278] [2021-07-09 17:17:19,377 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 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:19,408 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-07-09 17:17:19,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:19,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:19,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 113 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:19,522 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515608278] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:19,522 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:19,522 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 19 [2021-07-09 17:17:19,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964138426] [2021-07-09 17:17:19,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:17:19,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:19,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:17:19,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:17:19,523 INFO L87 Difference]: Start difference. First operand 14273 states and 36110 transitions. Second operand has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:19,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:19,928 INFO L93 Difference]: Finished difference Result 16871 states and 40798 transitions. [2021-07-09 17:17:19,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:17:19,928 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:19,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:19,952 INFO L225 Difference]: With dead ends: 16871 [2021-07-09 17:17:19,952 INFO L226 Difference]: Without dead ends: 16817 [2021-07-09 17:17:19,952 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 203.9ms TimeCoverageRelationStatistics Valid=188, Invalid=514, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:17:19,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16817 states. [2021-07-09 17:17:20,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16817 to 14273. [2021-07-09 17:17:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14273 states, 14272 states have (on average 2.529077914798206) internal successors, (36095), 14272 states have internal predecessors, (36095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:20,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14273 states to 14273 states and 36095 transitions. [2021-07-09 17:17:20,176 INFO L78 Accepts]: Start accepts. Automaton has 14273 states and 36095 transitions. Word has length 59 [2021-07-09 17:17:20,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:20,176 INFO L482 AbstractCegarLoop]: Abstraction has 14273 states and 36095 transitions. [2021-07-09 17:17:20,177 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.8) internal successors, (76), 19 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:20,177 INFO L276 IsEmpty]: Start isEmpty. Operand 14273 states and 36095 transitions. [2021-07-09 17:17:20,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:20,189 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:20,189 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:20,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1009,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:20,404 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:20,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1196579045, now seen corresponding path program 142 times [2021-07-09 17:17:20,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:20,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1556301036] [2021-07-09 17:17:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:20,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:20,499 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 9 proven. 165 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:20,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:20,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1556301036] [2021-07-09 17:17:20,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1556301036] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:20,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904989909] [2021-07-09 17:17:20,499 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:20,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:20,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:20,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:20,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 166 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:20,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904989909] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:20,616 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:20,616 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:17:20,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102836287] [2021-07-09 17:17:20,617 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:17:20,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:20,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:17:20,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:17:20,617 INFO L87 Difference]: Start difference. First operand 14273 states and 36095 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:21,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:21,199 INFO L93 Difference]: Finished difference Result 15978 states and 39441 transitions. [2021-07-09 17:17:21,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:17:21,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:21,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:21,225 INFO L225 Difference]: With dead ends: 15978 [2021-07-09 17:17:21,225 INFO L226 Difference]: Without dead ends: 15963 [2021-07-09 17:17:21,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 152.2ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:17:21,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15963 states. [2021-07-09 17:17:21,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15963 to 14540. [2021-07-09 17:17:21,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14540 states, 14539 states have (on average 2.5258958662906665) internal successors, (36724), 14539 states have internal predecessors, (36724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36724 transitions. [2021-07-09 17:17:21,459 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36724 transitions. Word has length 59 [2021-07-09 17:17:21,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:21,459 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36724 transitions. [2021-07-09 17:17:21,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:21,459 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36724 transitions. [2021-07-09 17:17:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:21,471 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:21,471 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:21,684 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 486 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1017 [2021-07-09 17:17:21,685 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:21,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:21,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1751753960, now seen corresponding path program 294 times [2021-07-09 17:17:21,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:21,685 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899971990] [2021-07-09 17:17:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:21,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:21,756 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:17:21,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:21,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899971990] [2021-07-09 17:17:21,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899971990] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:21,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189245949] [2021-07-09 17:17:21,756 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 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:21,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-09 17:17:21,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:21,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:21,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 105 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:17:21,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189245949] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:21,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:21,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:17:21,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128009111] [2021-07-09 17:17:21,876 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:17:21,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:21,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:17:21,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:17:21,876 INFO L87 Difference]: Start difference. First operand 14540 states and 36724 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) [2021-07-09 17:17:22,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:22,094 INFO L93 Difference]: Finished difference Result 17442 states and 41946 transitions. [2021-07-09 17:17:22,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:17:22,094 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:22,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:22,119 INFO L225 Difference]: With dead ends: 17442 [2021-07-09 17:17:22,119 INFO L226 Difference]: Without dead ends: 17424 [2021-07-09 17:17:22,119 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 80.7ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:22,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17424 states. [2021-07-09 17:17:22,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17424 to 14540. [2021-07-09 17:17:22,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14540 states, 14539 states have (on average 2.5246578169062524) internal successors, (36706), 14539 states have internal predecessors, (36706), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:22,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14540 states to 14540 states and 36706 transitions. [2021-07-09 17:17:22,552 INFO L78 Accepts]: Start accepts. Automaton has 14540 states and 36706 transitions. Word has length 59 [2021-07-09 17:17:22,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:22,552 INFO L482 AbstractCegarLoop]: Abstraction has 14540 states and 36706 transitions. [2021-07-09 17:17:22,552 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) [2021-07-09 17:17:22,552 INFO L276 IsEmpty]: Start isEmpty. Operand 14540 states and 36706 transitions. [2021-07-09 17:17:22,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:22,562 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:22,562 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:22,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1018,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:22,778 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:22,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:22,779 INFO L82 PathProgramCache]: Analyzing trace with hash 303753947, now seen corresponding path program 295 times [2021-07-09 17:17:22,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:22,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642740926] [2021-07-09 17:17:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:22,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:22,860 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 154 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:22,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:22,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642740926] [2021-07-09 17:17:22,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [642740926] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:22,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830078802] [2021-07-09 17:17:22,861 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 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:22,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:22,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 159 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:22,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830078802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:22,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:22,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:17:22,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882137665] [2021-07-09 17:17:22,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:17:22,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:22,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:17:22,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:17:22,983 INFO L87 Difference]: Start difference. First operand 14540 states and 36706 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:23,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:23,756 INFO L93 Difference]: Finished difference Result 15609 states and 38572 transitions. [2021-07-09 17:17:23,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:17:23,757 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:23,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:23,780 INFO L225 Difference]: With dead ends: 15609 [2021-07-09 17:17:23,780 INFO L226 Difference]: Without dead ends: 15481 [2021-07-09 17:17:23,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 151.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:17:23,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15481 states. [2021-07-09 17:17:23,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15481 to 14586. [2021-07-09 17:17:23,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14586 states, 14585 states have (on average 2.5154610901611245) internal successors, (36688), 14585 states have internal predecessors, (36688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:24,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14586 states to 14586 states and 36688 transitions. [2021-07-09 17:17:24,012 INFO L78 Accepts]: Start accepts. Automaton has 14586 states and 36688 transitions. Word has length 59 [2021-07-09 17:17:24,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:24,012 INFO L482 AbstractCegarLoop]: Abstraction has 14586 states and 36688 transitions. [2021-07-09 17:17:24,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:24,012 INFO L276 IsEmpty]: Start isEmpty. Operand 14586 states and 36688 transitions. [2021-07-09 17:17:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:24,025 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:24,025 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:24,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:24,237 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:24,237 INFO L82 PathProgramCache]: Analyzing trace with hash -309782233, now seen corresponding path program 296 times [2021-07-09 17:17:24,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:24,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371112348] [2021-07-09 17:17:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 155 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:17:24,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371112348] [2021-07-09 17:17:24,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371112348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:24,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285214223] [2021-07-09 17:17:24,347 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 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:24,373 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:24,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:24,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:24,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:17:24,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285214223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:24,458 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:24,458 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:17:24,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756526612] [2021-07-09 17:17:24,459 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:17:24,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:24,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:17:24,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:17:24,459 INFO L87 Difference]: Start difference. First operand 14586 states and 36688 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:25,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:25,009 INFO L93 Difference]: Finished difference Result 16298 states and 40065 transitions. [2021-07-09 17:17:25,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:17:25,009 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:25,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:25,033 INFO L225 Difference]: With dead ends: 16298 [2021-07-09 17:17:25,033 INFO L226 Difference]: Without dead ends: 16286 [2021-07-09 17:17:25,033 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 169.3ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:17:25,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16286 states. [2021-07-09 17:17:25,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16286 to 14730. [2021-07-09 17:17:25,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14730 states, 14729 states have (on average 2.5157172924163214) internal successors, (37054), 14729 states have internal predecessors, (37054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14730 states to 14730 states and 37054 transitions. [2021-07-09 17:17:25,262 INFO L78 Accepts]: Start accepts. Automaton has 14730 states and 37054 transitions. Word has length 59 [2021-07-09 17:17:25,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:25,263 INFO L482 AbstractCegarLoop]: Abstraction has 14730 states and 37054 transitions. [2021-07-09 17:17:25,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 11 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 14730 states and 37054 transitions. [2021-07-09 17:17:25,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:25,275 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:25,275 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:25,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1022 [2021-07-09 17:17:25,489 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:25,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:25,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1832135101, now seen corresponding path program 297 times [2021-07-09 17:17:25,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:25,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316730018] [2021-07-09 17:17:25,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:25,579 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:25,579 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:25,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316730018] [2021-07-09 17:17:25,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316730018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:25,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228836470] [2021-07-09 17:17:25,579 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 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:25,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 17:17:25,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:25,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:25,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:25,696 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:25,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228836470] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:25,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:25,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:17:25,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554261105] [2021-07-09 17:17:25,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:17:25,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:25,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:17:25,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:17:25,697 INFO L87 Difference]: Start difference. First operand 14730 states and 37054 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:26,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:26,615 INFO L93 Difference]: Finished difference Result 18459 states and 44889 transitions. [2021-07-09 17:17:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-07-09 17:17:26,615 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:26,642 INFO L225 Difference]: With dead ends: 18459 [2021-07-09 17:17:26,642 INFO L226 Difference]: Without dead ends: 18405 [2021-07-09 17:17:26,642 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=129, Invalid=927, Unknown=0, NotChecked=0, Total=1056 [2021-07-09 17:17:26,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18405 states. [2021-07-09 17:17:26,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18405 to 15161. [2021-07-09 17:17:26,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 2.5215039577836413) internal successors, (38226), 15160 states have internal predecessors, (38226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38226 transitions. [2021-07-09 17:17:26,879 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38226 transitions. Word has length 59 [2021-07-09 17:17:26,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:26,879 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38226 transitions. [2021-07-09 17:17:26,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38226 transitions. [2021-07-09 17:17:26,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:26,891 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:26,891 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:27,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1023 [2021-07-09 17:17:27,103 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:27,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:27,103 INFO L82 PathProgramCache]: Analyzing trace with hash -930273086, now seen corresponding path program 298 times [2021-07-09 17:17:27,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:27,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595927013] [2021-07-09 17:17:27,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:27,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:27,178 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:27,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595927013] [2021-07-09 17:17:27,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595927013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:27,178 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536519795] [2021-07-09 17:17:27,178 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 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:27,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:27,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:27,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:27,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:27,275 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 55 proven. 122 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:27,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [536519795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:27,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:27,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:17:27,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421406379] [2021-07-09 17:17:27,276 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:17:27,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:27,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:17:27,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:17:27,276 INFO L87 Difference]: Start difference. First operand 15161 states and 38226 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:27,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:27,516 INFO L93 Difference]: Finished difference Result 18207 states and 43712 transitions. [2021-07-09 17:17:27,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:17:27,516 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:27,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:27,546 INFO L225 Difference]: With dead ends: 18207 [2021-07-09 17:17:27,546 INFO L226 Difference]: Without dead ends: 18183 [2021-07-09 17:17:27,546 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 86.6ms TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:27,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18183 states. [2021-07-09 17:17:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18183 to 15161. [2021-07-09 17:17:27,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15161 states, 15160 states have (on average 2.520580474934037) internal successors, (38212), 15160 states have internal predecessors, (38212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:27,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15161 states to 15161 states and 38212 transitions. [2021-07-09 17:17:27,797 INFO L78 Accepts]: Start accepts. Automaton has 15161 states and 38212 transitions. Word has length 59 [2021-07-09 17:17:27,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:27,797 INFO L482 AbstractCegarLoop]: Abstraction has 15161 states and 38212 transitions. [2021-07-09 17:17:27,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:27,797 INFO L276 IsEmpty]: Start isEmpty. Operand 15161 states and 38212 transitions. [2021-07-09 17:17:27,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:27,811 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:27,811 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:28,026 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1024,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:28,027 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:28,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:28,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1986971635, now seen corresponding path program 299 times [2021-07-09 17:17:28,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:28,027 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611691937] [2021-07-09 17:17:28,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:28,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:28,125 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:28,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:28,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611691937] [2021-07-09 17:17:28,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611691937] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:28,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514875770] [2021-07-09 17:17:28,125 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:28,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 17:17:28,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:28,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:28,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:28,239 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:28,240 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514875770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:28,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:28,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:17:28,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750592359] [2021-07-09 17:17:28,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:28,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:28,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:28,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:28,240 INFO L87 Difference]: Start difference. First operand 15161 states and 38212 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:29,545 INFO L93 Difference]: Finished difference Result 23302 states and 55848 transitions. [2021-07-09 17:17:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-07-09 17:17:29,546 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:29,585 INFO L225 Difference]: With dead ends: 23302 [2021-07-09 17:17:29,585 INFO L226 Difference]: Without dead ends: 23134 [2021-07-09 17:17:29,585 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 592.4ms TimeCoverageRelationStatistics Valid=327, Invalid=2865, Unknown=0, NotChecked=0, Total=3192 [2021-07-09 17:17:29,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23134 states. [2021-07-09 17:17:29,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23134 to 16060. [2021-07-09 17:17:29,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16060 states, 16059 states have (on average 2.526745127342923) internal successors, (40577), 16059 states have internal predecessors, (40577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40577 transitions. [2021-07-09 17:17:29,889 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40577 transitions. Word has length 59 [2021-07-09 17:17:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:29,889 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40577 transitions. [2021-07-09 17:17:29,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40577 transitions. [2021-07-09 17:17:29,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:29,902 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:29,902 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:30,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 492 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1028 [2021-07-09 17:17:30,117 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:30,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:30,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1921392984, now seen corresponding path program 300 times [2021-07-09 17:17:30,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:30,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647256752] [2021-07-09 17:17:30,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:30,201 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:30,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:30,201 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647256752] [2021-07-09 17:17:30,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647256752] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:30,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182952147] [2021-07-09 17:17:30,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:30,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-07-09 17:17:30,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:30,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:30,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:30,314 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 47 proven. 130 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:30,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [182952147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:30,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:30,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:17:30,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819570406] [2021-07-09 17:17:30,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:30,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:30,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:30,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:30,315 INFO L87 Difference]: Start difference. First operand 16060 states and 40577 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:30,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:30,553 INFO L93 Difference]: Finished difference Result 19290 states and 46411 transitions. [2021-07-09 17:17:30,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:17:30,553 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:30,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:30,595 INFO L225 Difference]: With dead ends: 19290 [2021-07-09 17:17:30,595 INFO L226 Difference]: Without dead ends: 19257 [2021-07-09 17:17:30,596 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 101.6ms TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:17:30,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19257 states. [2021-07-09 17:17:30,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19257 to 16060. [2021-07-09 17:17:30,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16060 states, 16059 states have (on average 2.5261846939410924) internal successors, (40568), 16059 states have internal predecessors, (40568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:30,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16060 states to 16060 states and 40568 transitions. [2021-07-09 17:17:30,877 INFO L78 Accepts]: Start accepts. Automaton has 16060 states and 40568 transitions. Word has length 59 [2021-07-09 17:17:30,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:30,877 INFO L482 AbstractCegarLoop]: Abstraction has 16060 states and 40568 transitions. [2021-07-09 17:17:30,877 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:30,877 INFO L276 IsEmpty]: Start isEmpty. Operand 16060 states and 40568 transitions. [2021-07-09 17:17:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:30,890 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:30,890 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:31,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:31,106 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:31,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:31,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1927280125, now seen corresponding path program 301 times [2021-07-09 17:17:31,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:31,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473943057] [2021-07-09 17:17:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:31,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:31,219 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:31,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:31,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473943057] [2021-07-09 17:17:31,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473943057] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:31,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412266332] [2021-07-09 17:17:31,219 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 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:31,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:31,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:31,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:31,331 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:31,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412266332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:31,331 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:31,331 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:17:31,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49151509] [2021-07-09 17:17:31,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:31,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:31,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:31,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:31,332 INFO L87 Difference]: Start difference. First operand 16060 states and 40568 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:33,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:33,473 INFO L93 Difference]: Finished difference Result 33633 states and 79425 transitions. [2021-07-09 17:17:33,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-07-09 17:17:33,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:33,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:33,529 INFO L225 Difference]: With dead ends: 33633 [2021-07-09 17:17:33,529 INFO L226 Difference]: Without dead ends: 33177 [2021-07-09 17:17:33,529 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3400 ImplicationChecksByTransitivity, 1170.2ms TimeCoverageRelationStatistics Valid=813, Invalid=8499, Unknown=0, NotChecked=0, Total=9312 [2021-07-09 17:17:33,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33177 states. [2021-07-09 17:17:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33177 to 17660. [2021-07-09 17:17:33,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17660 states, 17659 states have (on average 2.532532986012798) internal successors, (44722), 17659 states have internal predecessors, (44722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:33,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44722 transitions. [2021-07-09 17:17:33,930 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44722 transitions. Word has length 59 [2021-07-09 17:17:33,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:33,930 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44722 transitions. [2021-07-09 17:17:33,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:33,930 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44722 transitions. [2021-07-09 17:17:33,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:33,944 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:33,944 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:34,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1034 [2021-07-09 17:17:34,160 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:34,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:34,160 INFO L82 PathProgramCache]: Analyzing trace with hash -474114302, now seen corresponding path program 302 times [2021-07-09 17:17:34,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:34,160 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787867508] [2021-07-09 17:17:34,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:34,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:34,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:34,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787867508] [2021-07-09 17:17:34,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787867508] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:34,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [717310419] [2021-07-09 17:17:34,255 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 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:34,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:34,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:34,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:34,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:34,367 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 45 proven. 132 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:34,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [717310419] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:34,367 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:34,367 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:17:34,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973482224] [2021-07-09 17:17:34,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:34,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:34,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:34,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:34,368 INFO L87 Difference]: Start difference. First operand 17660 states and 44722 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:34,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:34,614 INFO L93 Difference]: Finished difference Result 21199 states and 51145 transitions. [2021-07-09 17:17:34,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:17:34,615 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:34,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:34,647 INFO L225 Difference]: With dead ends: 21199 [2021-07-09 17:17:34,647 INFO L226 Difference]: Without dead ends: 21157 [2021-07-09 17:17:34,647 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 121.9ms TimeCoverageRelationStatistics Valid=129, Invalid=251, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:17:34,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21157 states. [2021-07-09 17:17:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21157 to 17660. [2021-07-09 17:17:34,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17660 states, 17659 states have (on average 2.532023330879438) internal successors, (44713), 17659 states have internal predecessors, (44713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:34,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17660 states to 17660 states and 44713 transitions. [2021-07-09 17:17:34,941 INFO L78 Accepts]: Start accepts. Automaton has 17660 states and 44713 transitions. Word has length 59 [2021-07-09 17:17:34,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:34,941 INFO L482 AbstractCegarLoop]: Abstraction has 17660 states and 44713 transitions. [2021-07-09 17:17:34,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 14 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:34,941 INFO L276 IsEmpty]: Start isEmpty. Operand 17660 states and 44713 transitions. [2021-07-09 17:17:34,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:34,953 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:34,954 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:35,169 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-07-09 17:17:35,169 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:35,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:35,169 INFO L82 PathProgramCache]: Analyzing trace with hash 1773966259, now seen corresponding path program 303 times [2021-07-09 17:17:35,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:35,169 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211760316] [2021-07-09 17:17:35,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:35,292 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:35,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:35,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211760316] [2021-07-09 17:17:35,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211760316] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:35,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408978303] [2021-07-09 17:17:35,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:35,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 17:17:35,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:35,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:35,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:35,414 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:35,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408978303] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:35,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:35,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:17:35,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721317440] [2021-07-09 17:17:35,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:35,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:35,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:35,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:35,415 INFO L87 Difference]: Start difference. First operand 17660 states and 44713 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:38,820 INFO L93 Difference]: Finished difference Result 57125 states and 132657 transitions. [2021-07-09 17:17:38,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2021-07-09 17:17:38,821 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:38,931 INFO L225 Difference]: With dead ends: 57125 [2021-07-09 17:17:38,932 INFO L226 Difference]: Without dead ends: 55739 [2021-07-09 17:17:38,935 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10598 ImplicationChecksByTransitivity, 2305.1ms TimeCoverageRelationStatistics Valid=1947, Invalid=23813, Unknown=0, NotChecked=0, Total=25760 [2021-07-09 17:17:38,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55739 states. [2021-07-09 17:17:39,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55739 to 20191. [2021-07-09 17:17:39,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20191 states, 20190 states have (on average 2.5379891035165922) internal successors, (51242), 20190 states have internal predecessors, (51242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:39,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51242 transitions. [2021-07-09 17:17:39,557 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51242 transitions. Word has length 59 [2021-07-09 17:17:39,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:39,557 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51242 transitions. [2021-07-09 17:17:39,557 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:39,557 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51242 transitions. [2021-07-09 17:17:39,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:39,570 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:39,570 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:39,786 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:39,786 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:39,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:39,786 INFO L82 PathProgramCache]: Analyzing trace with hash -1771583384, now seen corresponding path program 304 times [2021-07-09 17:17:39,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:39,786 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104208514] [2021-07-09 17:17:39,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:39,895 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:39,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:39,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104208514] [2021-07-09 17:17:39,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104208514] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:39,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883087863] [2021-07-09 17:17:39,896 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 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:39,924 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:39,924 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:39,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:39,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:40,010 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 49 proven. 128 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:40,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883087863] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:40,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:40,011 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-09 17:17:40,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813514275] [2021-07-09 17:17:40,011 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:40,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:40,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:40,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:40,011 INFO L87 Difference]: Start difference. First operand 20191 states and 51242 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:40,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:40,313 INFO L93 Difference]: Finished difference Result 24224 states and 58607 transitions. [2021-07-09 17:17:40,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:17:40,313 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:40,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:40,352 INFO L225 Difference]: With dead ends: 24224 [2021-07-09 17:17:40,352 INFO L226 Difference]: Without dead ends: 24173 [2021-07-09 17:17:40,352 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 149.2ms TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:17:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24173 states. [2021-07-09 17:17:40,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24173 to 20191. [2021-07-09 17:17:40,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20191 states, 20190 states have (on average 2.53754333828628) internal successors, (51233), 20190 states have internal predecessors, (51233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:40,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20191 states to 20191 states and 51233 transitions. [2021-07-09 17:17:40,703 INFO L78 Accepts]: Start accepts. Automaton has 20191 states and 51233 transitions. Word has length 59 [2021-07-09 17:17:40,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:40,703 INFO L482 AbstractCegarLoop]: Abstraction has 20191 states and 51233 transitions. [2021-07-09 17:17:40,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:40,704 INFO L276 IsEmpty]: Start isEmpty. Operand 20191 states and 51233 transitions. [2021-07-09 17:17:40,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:40,717 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:40,717 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:40,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1042,497 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:40,932 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:40,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:40,932 INFO L82 PathProgramCache]: Analyzing trace with hash -49180099, now seen corresponding path program 305 times [2021-07-09 17:17:40,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:40,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228976871] [2021-07-09 17:17:40,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:41,078 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:41,079 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:41,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228976871] [2021-07-09 17:17:41,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228976871] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:41,079 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434695387] [2021-07-09 17:17:41,079 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 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:41,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 17:17:41,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:41,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:41,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:17:41,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1434695387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:41,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:41,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 16 [2021-07-09 17:17:41,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158214895] [2021-07-09 17:17:41,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:17:41,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:41,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:17:41,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:17:41,196 INFO L87 Difference]: Start difference. First operand 20191 states and 51233 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:46,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:46,981 INFO L93 Difference]: Finished difference Result 72936 states and 170877 transitions. [2021-07-09 17:17:46,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2021-07-09 17:17:46,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:46,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:47,573 INFO L225 Difference]: With dead ends: 72936 [2021-07-09 17:17:47,574 INFO L226 Difference]: Without dead ends: 71616 [2021-07-09 17:17:47,576 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29073 ImplicationChecksByTransitivity, 4178.4ms TimeCoverageRelationStatistics Valid=4377, Invalid=61415, Unknown=0, NotChecked=0, Total=65792 [2021-07-09 17:17:47,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71616 states. [2021-07-09 17:17:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71616 to 22239. [2021-07-09 17:17:48,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22239 states, 22238 states have (on average 2.5387624786401655) internal successors, (56457), 22238 states have internal predecessors, (56457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:48,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22239 states to 22239 states and 56457 transitions. [2021-07-09 17:17:48,603 INFO L78 Accepts]: Start accepts. Automaton has 22239 states and 56457 transitions. Word has length 59 [2021-07-09 17:17:48,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:48,603 INFO L482 AbstractCegarLoop]: Abstraction has 22239 states and 56457 transitions. [2021-07-09 17:17:48,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:48,603 INFO L276 IsEmpty]: Start isEmpty. Operand 22239 states and 56457 transitions. [2021-07-09 17:17:48,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:48,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:48,616 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:48,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1049,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:48,832 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:48,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:48,833 INFO L82 PathProgramCache]: Analyzing trace with hash 32658754, now seen corresponding path program 306 times [2021-07-09 17:17:48,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:48,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051973218] [2021-07-09 17:17:48,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:48,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:48,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:48,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051973218] [2021-07-09 17:17:48,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051973218] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:48,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645773034] [2021-07-09 17:17:48,951 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 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:48,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:17:48,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:48,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:48,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 59 proven. 118 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:49,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1645773034] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:49,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:49,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-09 17:17:49,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017424311] [2021-07-09 17:17:49,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:17:49,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:49,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:17:49,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:17:49,067 INFO L87 Difference]: Start difference. First operand 22239 states and 56457 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:49,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:49,406 INFO L93 Difference]: Finished difference Result 26451 states and 64189 transitions. [2021-07-09 17:17:49,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:17:49,407 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:49,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:49,605 INFO L225 Difference]: With dead ends: 26451 [2021-07-09 17:17:49,606 INFO L226 Difference]: Without dead ends: 26391 [2021-07-09 17:17:49,606 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 167.6ms TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:17:49,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26391 states. [2021-07-09 17:17:49,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26391 to 21958. [2021-07-09 17:17:49,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21958 states, 21957 states have (on average 2.5370041444641798) internal successors, (55705), 21957 states have internal predecessors, (55705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:50,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21958 states to 21958 states and 55705 transitions. [2021-07-09 17:17:50,022 INFO L78 Accepts]: Start accepts. Automaton has 21958 states and 55705 transitions. Word has length 59 [2021-07-09 17:17:50,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:50,022 INFO L482 AbstractCegarLoop]: Abstraction has 21958 states and 55705 transitions. [2021-07-09 17:17:50,022 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 16 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:50,022 INFO L276 IsEmpty]: Start isEmpty. Operand 21958 states and 55705 transitions. [2021-07-09 17:17:50,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:50,037 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:50,037 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:50,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1050,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:50,253 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:50,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:50,253 INFO L82 PathProgramCache]: Analyzing trace with hash 754093939, now seen corresponding path program 307 times [2021-07-09 17:17:50,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:50,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011711985] [2021-07-09 17:17:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:50,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:50,412 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:50,412 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:50,412 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011711985] [2021-07-09 17:17:50,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011711985] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:50,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591381789] [2021-07-09 17:17:50,413 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 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:17:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 160 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:50,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591381789] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:50,530 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:50,530 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-09 17:17:50,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547364393] [2021-07-09 17:17:50,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:17:50,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:50,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:17:50,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:17:50,530 INFO L87 Difference]: Start difference. First operand 21958 states and 55705 transitions. Second operand has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:51,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:51,676 INFO L93 Difference]: Finished difference Result 30778 states and 73104 transitions. [2021-07-09 17:17:51,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:17:51,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:51,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:51,740 INFO L225 Difference]: With dead ends: 30778 [2021-07-09 17:17:51,740 INFO L226 Difference]: Without dead ends: 28996 [2021-07-09 17:17:51,740 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 467.5ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:17:51,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28996 states. [2021-07-09 17:17:52,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28996 to 14128. [2021-07-09 17:17:52,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14128 states, 14127 states have (on average 2.5023713456501735) internal successors, (35351), 14127 states have internal predecessors, (35351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:52,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14128 states to 14128 states and 35351 transitions. [2021-07-09 17:17:52,219 INFO L78 Accepts]: Start accepts. Automaton has 14128 states and 35351 transitions. Word has length 59 [2021-07-09 17:17:52,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:52,219 INFO L482 AbstractCegarLoop]: Abstraction has 14128 states and 35351 transitions. [2021-07-09 17:17:52,219 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.3333333333333335) internal successors, (60), 17 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:52,219 INFO L276 IsEmpty]: Start isEmpty. Operand 14128 states and 35351 transitions. [2021-07-09 17:17:52,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:52,231 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:52,231 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:52,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1058 [2021-07-09 17:17:52,447 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:52,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:52,447 INFO L82 PathProgramCache]: Analyzing trace with hash 516032422, now seen corresponding path program 143 times [2021-07-09 17:17:52,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:52,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508998736] [2021-07-09 17:17:52,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:52,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:52,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:52,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508998736] [2021-07-09 17:17:52,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508998736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:52,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438579963] [2021-07-09 17:17:52,520 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 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:52,561 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 17:17:52,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:52,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:52,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:52,796 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 50 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:52,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438579963] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:52,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:52,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-07-09 17:17:52,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253155061] [2021-07-09 17:17:52,797 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:17:52,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:52,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:17:52,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:17:52,797 INFO L87 Difference]: Start difference. First operand 14128 states and 35351 transitions. Second operand has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:53,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:53,197 INFO L93 Difference]: Finished difference Result 16812 states and 41038 transitions. [2021-07-09 17:17:53,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:17:53,198 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:53,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:53,226 INFO L225 Difference]: With dead ends: 16812 [2021-07-09 17:17:53,226 INFO L226 Difference]: Without dead ends: 16798 [2021-07-09 17:17:53,226 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 126.4ms TimeCoverageRelationStatistics Valid=177, Invalid=329, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:17:53,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16798 states. [2021-07-09 17:17:53,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16798 to 14566. [2021-07-09 17:17:53,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14566 states, 14565 states have (on average 2.5051150017164434) internal successors, (36487), 14565 states have internal predecessors, (36487), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:53,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14566 states to 14566 states and 36487 transitions. [2021-07-09 17:17:53,539 INFO L78 Accepts]: Start accepts. Automaton has 14566 states and 36487 transitions. Word has length 59 [2021-07-09 17:17:53,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:53,539 INFO L482 AbstractCegarLoop]: Abstraction has 14566 states and 36487 transitions. [2021-07-09 17:17:53,539 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.333333333333333) internal successors, (91), 20 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:53,539 INFO L276 IsEmpty]: Start isEmpty. Operand 14566 states and 36487 transitions. [2021-07-09 17:17:53,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:53,551 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:53,551 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:53,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 501 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1059 [2021-07-09 17:17:53,766 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:53,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:53,767 INFO L82 PathProgramCache]: Analyzing trace with hash -105847988, now seen corresponding path program 144 times [2021-07-09 17:17:53,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:53,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502507179] [2021-07-09 17:17:53,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:53,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:53,836 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:53,836 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:53,836 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502507179] [2021-07-09 17:17:53,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502507179] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:53,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649644418] [2021-07-09 17:17:53,837 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 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:53,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-09 17:17:53,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:53,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:53,956 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:53,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649644418] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:53,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:53,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:17:53,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093387336] [2021-07-09 17:17:53,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:17:53,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:53,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:17:53,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=89, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:17:53,957 INFO L87 Difference]: Start difference. First operand 14566 states and 36487 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:54,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:54,237 INFO L93 Difference]: Finished difference Result 19427 states and 46843 transitions. [2021-07-09 17:17:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:17:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:54,384 INFO L225 Difference]: With dead ends: 19427 [2021-07-09 17:17:54,385 INFO L226 Difference]: Without dead ends: 19427 [2021-07-09 17:17:54,385 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=158, Invalid=222, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:17:54,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19427 states. [2021-07-09 17:17:54,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19427 to 14571. [2021-07-09 17:17:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14571 states, 14570 states have (on average 2.5052848318462595) internal successors, (36502), 14570 states have internal predecessors, (36502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:54,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14571 states to 14571 states and 36502 transitions. [2021-07-09 17:17:54,603 INFO L78 Accepts]: Start accepts. Automaton has 14571 states and 36502 transitions. Word has length 59 [2021-07-09 17:17:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:54,603 INFO L482 AbstractCegarLoop]: Abstraction has 14571 states and 36502 transitions. [2021-07-09 17:17:54,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:54,603 INFO L276 IsEmpty]: Start isEmpty. Operand 14571 states and 36502 transitions. [2021-07-09 17:17:54,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:54,616 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:54,616 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:54,832 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1061 [2021-07-09 17:17:54,832 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:54,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:54,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1743420444, now seen corresponding path program 145 times [2021-07-09 17:17:54,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:54,833 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857341414] [2021-07-09 17:17:54,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:54,912 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 128 proven. 49 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:54,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:54,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857341414] [2021-07-09 17:17:54,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857341414] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:54,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455585798] [2021-07-09 17:17:54,913 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 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:55,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:55,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:55,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 129 proven. 49 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:55,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455585798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:55,141 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:55,141 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:17:55,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839235202] [2021-07-09 17:17:55,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:17:55,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:55,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:17:55,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:17:55,142 INFO L87 Difference]: Start difference. First operand 14571 states and 36502 transitions. Second operand has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:55,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:55,588 INFO L93 Difference]: Finished difference Result 21523 states and 51587 transitions. [2021-07-09 17:17:55,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-09 17:17:55,588 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:55,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:55,622 INFO L225 Difference]: With dead ends: 21523 [2021-07-09 17:17:55,622 INFO L226 Difference]: Without dead ends: 21523 [2021-07-09 17:17:55,623 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 184.2ms TimeCoverageRelationStatistics Valid=272, Invalid=430, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:17:55,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21523 states. [2021-07-09 17:17:55,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21523 to 14590. [2021-07-09 17:17:55,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14590 states, 14589 states have (on average 2.506134759065049) internal successors, (36562), 14589 states have internal predecessors, (36562), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:55,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14590 states to 14590 states and 36562 transitions. [2021-07-09 17:17:55,962 INFO L78 Accepts]: Start accepts. Automaton has 14590 states and 36562 transitions. Word has length 59 [2021-07-09 17:17:55,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:55,963 INFO L482 AbstractCegarLoop]: Abstraction has 14590 states and 36562 transitions. [2021-07-09 17:17:55,963 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.5) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:55,963 INFO L276 IsEmpty]: Start isEmpty. Operand 14590 states and 36562 transitions. [2021-07-09 17:17:55,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:55,974 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:55,974 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:56,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1062,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:56,190 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:56,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:56,190 INFO L82 PathProgramCache]: Analyzing trace with hash 861551688, now seen corresponding path program 146 times [2021-07-09 17:17:56,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:56,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804958742] [2021-07-09 17:17:56,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:56,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:56,279 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 124 proven. 53 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:56,279 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:56,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804958742] [2021-07-09 17:17:56,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804958742] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:56,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007429065] [2021-07-09 17:17:56,280 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 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:56,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:17:56,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:56,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:56,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 125 proven. 53 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:56,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007429065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:56,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:56,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-09 17:17:56,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389008896] [2021-07-09 17:17:56,403 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:17:56,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:56,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:17:56,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=136, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:17:56,403 INFO L87 Difference]: Start difference. First operand 14590 states and 36562 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:56,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:56,986 INFO L93 Difference]: Finished difference Result 22499 states and 53828 transitions. [2021-07-09 17:17:56,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:17:56,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:56,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:57,021 INFO L225 Difference]: With dead ends: 22499 [2021-07-09 17:17:57,021 INFO L226 Difference]: Without dead ends: 22499 [2021-07-09 17:17:57,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 317.4ms TimeCoverageRelationStatistics Valid=375, Invalid=617, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:17:57,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22499 states. [2021-07-09 17:17:57,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22499 to 14615. [2021-07-09 17:17:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14615 states, 14614 states have (on average 2.507184891200219) internal successors, (36640), 14614 states have internal predecessors, (36640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:57,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14615 states to 14615 states and 36640 transitions. [2021-07-09 17:17:57,422 INFO L78 Accepts]: Start accepts. Automaton has 14615 states and 36640 transitions. Word has length 59 [2021-07-09 17:17:57,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:57,422 INFO L482 AbstractCegarLoop]: Abstraction has 14615 states and 36640 transitions. [2021-07-09 17:17:57,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:57,423 INFO L276 IsEmpty]: Start isEmpty. Operand 14615 states and 36640 transitions. [2021-07-09 17:17:57,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:57,434 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:57,434 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:57,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:57,648 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:57,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:57,648 INFO L82 PathProgramCache]: Analyzing trace with hash -177735324, now seen corresponding path program 147 times [2021-07-09 17:17:57,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:57,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677220137] [2021-07-09 17:17:57,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:57,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:57,755 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 120 proven. 57 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:57,755 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:57,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677220137] [2021-07-09 17:17:57,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677220137] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:57,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912158589] [2021-07-09 17:17:57,756 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 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:57,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 17:17:57,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:57,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:57,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:57,888 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 57 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:57,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912158589] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:57,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:57,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-09 17:17:57,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905224083] [2021-07-09 17:17:57,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:17:57,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:57,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:17:57,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:17:57,889 INFO L87 Difference]: Start difference. First operand 14615 states and 36640 transitions. Second operand has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:58,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:17:58,637 INFO L93 Difference]: Finished difference Result 22401 states and 53647 transitions. [2021-07-09 17:17:58,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-07-09 17:17:58,638 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:17:58,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:17:58,668 INFO L225 Difference]: With dead ends: 22401 [2021-07-09 17:17:58,668 INFO L226 Difference]: Without dead ends: 22401 [2021-07-09 17:17:58,668 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 286.0ms TimeCoverageRelationStatistics Valid=448, Invalid=742, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:17:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22401 states. [2021-07-09 17:17:58,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22401 to 14646. [2021-07-09 17:17:58,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14646 states, 14645 states have (on average 2.508432912256743) internal successors, (36736), 14645 states have internal predecessors, (36736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:58,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14646 states to 14646 states and 36736 transitions. [2021-07-09 17:17:58,938 INFO L78 Accepts]: Start accepts. Automaton has 14646 states and 36736 transitions. Word has length 59 [2021-07-09 17:17:58,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:17:58,938 INFO L482 AbstractCegarLoop]: Abstraction has 14646 states and 36736 transitions. [2021-07-09 17:17:58,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.9375) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:17:58,938 INFO L276 IsEmpty]: Start isEmpty. Operand 14646 states and 36736 transitions. [2021-07-09 17:17:58,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:17:58,950 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:17:58,950 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:17:59,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1064,505 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:59,166 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:17:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:17:59,166 INFO L82 PathProgramCache]: Analyzing trace with hash 842127048, now seen corresponding path program 148 times [2021-07-09 17:17:59,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:17:59,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773766700] [2021-07-09 17:17:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:17:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:17:59,387 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 61 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:17:59,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:17:59,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773766700] [2021-07-09 17:17:59,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773766700] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:59,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337676331] [2021-07-09 17:17:59,388 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 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:17:59,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:17:59,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:17:59,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:17:59,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:17:59,505 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 117 proven. 61 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:17:59,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337676331] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:17:59,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:17:59,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 16 [2021-07-09 17:17:59,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239276443] [2021-07-09 17:17:59,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:17:59,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:17:59,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:17:59,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:17:59,506 INFO L87 Difference]: Start difference. First operand 14646 states and 36736 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:00,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:00,073 INFO L93 Difference]: Finished difference Result 21283 states and 51152 transitions. [2021-07-09 17:18:00,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-09 17:18:00,074 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:00,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:00,109 INFO L225 Difference]: With dead ends: 21283 [2021-07-09 17:18:00,109 INFO L226 Difference]: Without dead ends: 21283 [2021-07-09 17:18:00,110 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 412.1ms TimeCoverageRelationStatistics Valid=473, Invalid=787, Unknown=0, NotChecked=0, Total=1260 [2021-07-09 17:18:00,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21283 states. [2021-07-09 17:18:00,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21283 to 14683. [2021-07-09 17:18:00,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14683 states, 14682 states have (on average 2.5098760386868273) internal successors, (36850), 14682 states have internal predecessors, (36850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:00,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14683 states to 14683 states and 36850 transitions. [2021-07-09 17:18:00,464 INFO L78 Accepts]: Start accepts. Automaton has 14683 states and 36850 transitions. Word has length 59 [2021-07-09 17:18:00,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:00,464 INFO L482 AbstractCegarLoop]: Abstraction has 14683 states and 36850 transitions. [2021-07-09 17:18:00,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:00,464 INFO L276 IsEmpty]: Start isEmpty. Operand 14683 states and 36850 transitions. [2021-07-09 17:18:00,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:00,477 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:00,477 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:00,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,506 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:00,692 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:00,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:00,693 INFO L82 PathProgramCache]: Analyzing trace with hash 963399396, now seen corresponding path program 149 times [2021-07-09 17:18:00,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:00,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960500609] [2021-07-09 17:18:00,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:00,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:00,817 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 112 proven. 65 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:00,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:00,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960500609] [2021-07-09 17:18:00,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960500609] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:00,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862579996] [2021-07-09 17:18:00,818 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 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:00,851 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-07-09 17:18:00,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:00,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:00,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:00,999 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 113 proven. 65 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:00,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862579996] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:00,999 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:00,999 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 25 [2021-07-09 17:18:00,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771408815] [2021-07-09 17:18:00,999 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-07-09 17:18:00,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:01,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-07-09 17:18:01,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=469, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:18:01,000 INFO L87 Difference]: Start difference. First operand 14683 states and 36850 transitions. Second operand has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:01,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:01,942 INFO L93 Difference]: Finished difference Result 19401 states and 46815 transitions. [2021-07-09 17:18:01,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:18:01,942 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:01,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:01,972 INFO L225 Difference]: With dead ends: 19401 [2021-07-09 17:18:01,972 INFO L226 Difference]: Without dead ends: 19401 [2021-07-09 17:18:01,972 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 449.9ms TimeCoverageRelationStatistics Valid=617, Invalid=1189, Unknown=0, NotChecked=0, Total=1806 [2021-07-09 17:18:01,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19401 states. [2021-07-09 17:18:02,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19401 to 14710. [2021-07-09 17:18:02,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14710 states, 14709 states have (on average 2.5105717587871372) internal successors, (36928), 14709 states have internal predecessors, (36928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14710 states to 14710 states and 36928 transitions. [2021-07-09 17:18:02,380 INFO L78 Accepts]: Start accepts. Automaton has 14710 states and 36928 transitions. Word has length 59 [2021-07-09 17:18:02,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:02,380 INFO L482 AbstractCegarLoop]: Abstraction has 14710 states and 36928 transitions. [2021-07-09 17:18:02,380 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 3.5) internal successors, (91), 25 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:02,380 INFO L276 IsEmpty]: Start isEmpty. Operand 14710 states and 36928 transitions. [2021-07-09 17:18:02,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:02,392 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:02,392 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:02,607 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1066 [2021-07-09 17:18:02,607 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:02,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:02,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1720422728, now seen corresponding path program 150 times [2021-07-09 17:18:02,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:02,607 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912046033] [2021-07-09 17:18:02,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:02,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 108 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:02,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:02,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912046033] [2021-07-09 17:18:02,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912046033] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:02,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695636478] [2021-07-09 17:18:02,746 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 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:02,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-07-09 17:18:02,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:02,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:02,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 109 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:02,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1695636478] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:02,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:02,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 18 [2021-07-09 17:18:02,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816212844] [2021-07-09 17:18:02,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:18:02,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:18:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:02,871 INFO L87 Difference]: Start difference. First operand 14710 states and 36928 transitions. Second operand has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:03,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:03,352 INFO L93 Difference]: Finished difference Result 16916 states and 41381 transitions. [2021-07-09 17:18:03,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:18:03,352 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:03,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:03,378 INFO L225 Difference]: With dead ends: 16916 [2021-07-09 17:18:03,379 INFO L226 Difference]: Without dead ends: 16916 [2021-07-09 17:18:03,379 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 278.0ms TimeCoverageRelationStatistics Valid=347, Invalid=645, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:18:03,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16916 states. [2021-07-09 17:18:03,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16916 to 13840. [2021-07-09 17:18:03,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13840 states, 13839 states have (on average 2.5019148782426477) internal successors, (34624), 13839 states have internal predecessors, (34624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13840 states to 13840 states and 34624 transitions. [2021-07-09 17:18:03,725 INFO L78 Accepts]: Start accepts. Automaton has 13840 states and 34624 transitions. Word has length 59 [2021-07-09 17:18:03,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:03,725 INFO L482 AbstractCegarLoop]: Abstraction has 13840 states and 34624 transitions. [2021-07-09 17:18:03,725 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.3157894736842106) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:03,725 INFO L276 IsEmpty]: Start isEmpty. Operand 13840 states and 34624 transitions. [2021-07-09 17:18:03,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:03,737 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:03,737 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:03,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1067,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:03,954 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:03,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:03,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1305517528, now seen corresponding path program 308 times [2021-07-09 17:18:03,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:03,954 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320249460] [2021-07-09 17:18:03,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:03,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:04,083 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:04,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:04,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320249460] [2021-07-09 17:18:04,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320249460] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:04,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287375802] [2021-07-09 17:18:04,083 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 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:04,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:04,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:04,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:04,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:04,193 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 102 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287375802] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:04,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:04,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-09 17:18:04,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402799518] [2021-07-09 17:18:04,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:18:04,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:18:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:04,194 INFO L87 Difference]: Start difference. First operand 13840 states and 34624 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:04,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:04,642 INFO L93 Difference]: Finished difference Result 16377 states and 39177 transitions. [2021-07-09 17:18:04,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:18:04,642 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:04,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:04,662 INFO L225 Difference]: With dead ends: 16377 [2021-07-09 17:18:04,662 INFO L226 Difference]: Without dead ends: 16314 [2021-07-09 17:18:04,662 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 191.3ms TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:18:04,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16314 states. [2021-07-09 17:18:04,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16314 to 13849. [2021-07-09 17:18:04,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13849 states, 13848 states have (on average 2.500938763720393) internal successors, (34633), 13848 states have internal predecessors, (34633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:04,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13849 states to 13849 states and 34633 transitions. [2021-07-09 17:18:04,866 INFO L78 Accepts]: Start accepts. Automaton has 13849 states and 34633 transitions. Word has length 59 [2021-07-09 17:18:04,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:04,866 INFO L482 AbstractCegarLoop]: Abstraction has 13849 states and 34633 transitions. [2021-07-09 17:18:04,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:04,866 INFO L276 IsEmpty]: Start isEmpty. Operand 13849 states and 34633 transitions. [2021-07-09 17:18:04,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:04,877 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:04,877 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:05,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1068 [2021-07-09 17:18:05,094 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:05,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:05,094 INFO L82 PathProgramCache]: Analyzing trace with hash -290755390, now seen corresponding path program 309 times [2021-07-09 17:18:05,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:05,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386115768] [2021-07-09 17:18:05,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:05,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:05,234 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:05,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:05,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386115768] [2021-07-09 17:18:05,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386115768] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:05,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267028894] [2021-07-09 17:18:05,234 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 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:05,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:18:05,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:05,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:05,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:05,357 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 90 proven. 87 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:05,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267028894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:05,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:05,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-07-09 17:18:05,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [382215949] [2021-07-09 17:18:05,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:18:05,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:05,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:18:05,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:05,357 INFO L87 Difference]: Start difference. First operand 13849 states and 34633 transitions. Second operand has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:05,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:05,902 INFO L93 Difference]: Finished difference Result 16221 states and 39411 transitions. [2021-07-09 17:18:05,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:18:05,902 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:05,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:05,928 INFO L225 Difference]: With dead ends: 16221 [2021-07-09 17:18:05,929 INFO L226 Difference]: Without dead ends: 16221 [2021-07-09 17:18:05,929 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 342.8ms TimeCoverageRelationStatistics Valid=324, Invalid=606, Unknown=0, NotChecked=0, Total=930 [2021-07-09 17:18:05,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16221 states. [2021-07-09 17:18:06,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16221 to 13663. [2021-07-09 17:18:06,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13663 states, 13662 states have (on average 2.506441223832528) internal successors, (34243), 13662 states have internal predecessors, (34243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:06,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13663 states to 13663 states and 34243 transitions. [2021-07-09 17:18:06,190 INFO L78 Accepts]: Start accepts. Automaton has 13663 states and 34243 transitions. Word has length 59 [2021-07-09 17:18:06,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:06,190 INFO L482 AbstractCegarLoop]: Abstraction has 13663 states and 34243 transitions. [2021-07-09 17:18:06,190 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.1666666666666665) internal successors, (57), 17 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:06,190 INFO L276 IsEmpty]: Start isEmpty. Operand 13663 states and 34243 transitions. [2021-07-09 17:18:06,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:06,200 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:06,201 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:06,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-07-09 17:18:06,416 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:06,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:06,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1740888523, now seen corresponding path program 151 times [2021-07-09 17:18:06,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:06,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425459790] [2021-07-09 17:18:06,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:06,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:06,688 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:06,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:06,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425459790] [2021-07-09 17:18:06,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425459790] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:06,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690548013] [2021-07-09 17:18:06,688 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 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:06,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:06,812 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:06,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690548013] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:06,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:06,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 17 [2021-07-09 17:18:06,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711143790] [2021-07-09 17:18:06,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:18:06,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:06,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:18:06,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:06,813 INFO L87 Difference]: Start difference. First operand 13663 states and 34243 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:07,708 INFO L93 Difference]: Finished difference Result 18431 states and 44151 transitions. [2021-07-09 17:18:07,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-09 17:18:07,708 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:07,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:07,735 INFO L225 Difference]: With dead ends: 18431 [2021-07-09 17:18:07,735 INFO L226 Difference]: Without dead ends: 18317 [2021-07-09 17:18:07,735 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 588.0ms TimeCoverageRelationStatistics Valid=224, Invalid=1182, Unknown=0, NotChecked=0, Total=1406 [2021-07-09 17:18:07,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18317 states. [2021-07-09 17:18:08,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18317 to 13282. [2021-07-09 17:18:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 2.505157744145772) internal successors, (33271), 13281 states have internal predecessors, (33271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:08,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33271 transitions. [2021-07-09 17:18:08,054 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33271 transitions. Word has length 59 [2021-07-09 17:18:08,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:08,054 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33271 transitions. [2021-07-09 17:18:08,054 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:08,054 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33271 transitions. [2021-07-09 17:18:08,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:08,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:08,066 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:08,282 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1078 [2021-07-09 17:18:08,282 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:08,282 INFO L82 PathProgramCache]: Analyzing trace with hash 285880821, now seen corresponding path program 310 times [2021-07-09 17:18:08,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:08,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615017497] [2021-07-09 17:18:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:08,450 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:08,450 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:08,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615017497] [2021-07-09 17:18:08,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615017497] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:08,450 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296330957] [2021-07-09 17:18:08,450 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:08,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:08,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:08,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:08,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:08,774 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:08,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296330957] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:08,774 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:08,774 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 23 [2021-07-09 17:18:08,774 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83256621] [2021-07-09 17:18:08,774 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-07-09 17:18:08,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:08,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-07-09 17:18:08,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=493, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:18:08,775 INFO L87 Difference]: Start difference. First operand 13282 states and 33271 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:09,908 INFO L93 Difference]: Finished difference Result 13442 states and 33525 transitions. [2021-07-09 17:18:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:18:09,909 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:09,927 INFO L225 Difference]: With dead ends: 13442 [2021-07-09 17:18:09,927 INFO L226 Difference]: Without dead ends: 13362 [2021-07-09 17:18:09,927 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 324.2ms TimeCoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:18:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13362 states. [2021-07-09 17:18:10,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13362 to 13282. [2021-07-09 17:18:10,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13282 states, 13281 states have (on average 2.5013176718620587) internal successors, (33220), 13281 states have internal predecessors, (33220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:10,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13282 states to 13282 states and 33220 transitions. [2021-07-09 17:18:10,119 INFO L78 Accepts]: Start accepts. Automaton has 13282 states and 33220 transitions. Word has length 59 [2021-07-09 17:18:10,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:10,119 INFO L482 AbstractCegarLoop]: Abstraction has 13282 states and 33220 transitions. [2021-07-09 17:18:10,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 23 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:10,119 INFO L276 IsEmpty]: Start isEmpty. Operand 13282 states and 33220 transitions. [2021-07-09 17:18:10,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:10,131 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:10,131 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:10,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-07-09 17:18:10,345 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash 233038186, now seen corresponding path program 311 times [2021-07-09 17:18:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:10,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721088336] [2021-07-09 17:18:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:10,466 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:10,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:10,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721088336] [2021-07-09 17:18:10,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721088336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:10,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87873611] [2021-07-09 17:18:10,466 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:10,498 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:18:10,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:10,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:10,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:10,677 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 88 proven. 89 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:10,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87873611] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:10,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:10,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 27 [2021-07-09 17:18:10,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881091233] [2021-07-09 17:18:10,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-07-09 17:18:10,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:10,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-07-09 17:18:10,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=567, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:18:10,678 INFO L87 Difference]: Start difference. First operand 13282 states and 33220 transitions. Second operand has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:11,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:11,438 INFO L93 Difference]: Finished difference Result 16482 states and 39782 transitions. [2021-07-09 17:18:11,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-07-09 17:18:11,438 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:11,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:11,463 INFO L225 Difference]: With dead ends: 16482 [2021-07-09 17:18:11,464 INFO L226 Difference]: Without dead ends: 16482 [2021-07-09 17:18:11,464 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 359.6ms TimeCoverageRelationStatistics Valid=499, Invalid=1223, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:18:11,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16482 states. [2021-07-09 17:18:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16482 to 13694. [2021-07-09 17:18:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13694 states, 13693 states have (on average 2.5162491784123273) internal successors, (34455), 13693 states have internal predecessors, (34455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:11,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13694 states to 13694 states and 34455 transitions. [2021-07-09 17:18:11,684 INFO L78 Accepts]: Start accepts. Automaton has 13694 states and 34455 transitions. Word has length 59 [2021-07-09 17:18:11,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:11,685 INFO L482 AbstractCegarLoop]: Abstraction has 13694 states and 34455 transitions. [2021-07-09 17:18:11,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 3.4642857142857144) internal successors, (97), 27 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:11,685 INFO L276 IsEmpty]: Start isEmpty. Operand 13694 states and 34455 transitions. [2021-07-09 17:18:11,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:11,695 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:11,695 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:11,911 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1080,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:11,911 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:11,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:11,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2141933289, now seen corresponding path program 152 times [2021-07-09 17:18:11,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:11,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564116513] [2021-07-09 17:18:11,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:12,048 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:12,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564116513] [2021-07-09 17:18:12,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564116513] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:12,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909548336] [2021-07-09 17:18:12,048 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 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:12,077 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:12,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:12,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 23 conjunts are in the unsatisfiable core [2021-07-09 17:18:12,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:13,019 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 49 proven. 127 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:13,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909548336] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:13,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:13,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-07-09 17:18:13,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956253482] [2021-07-09 17:18:13,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-07-09 17:18:13,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:13,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-07-09 17:18:13,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1004, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:18:13,020 INFO L87 Difference]: Start difference. First operand 13694 states and 34455 transitions. Second operand has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:22,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:22,689 INFO L93 Difference]: Finished difference Result 28070 states and 65966 transitions. [2021-07-09 17:18:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 229 states. [2021-07-09 17:18:22,690 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:22,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:22,732 INFO L225 Difference]: With dead ends: 28070 [2021-07-09 17:18:22,732 INFO L226 Difference]: Without dead ends: 27508 [2021-07-09 17:18:22,736 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 40 SyntacticMatches, 4 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23843 ImplicationChecksByTransitivity, 8143.3ms TimeCoverageRelationStatistics Valid=7596, Invalid=53166, Unknown=0, NotChecked=0, Total=60762 [2021-07-09 17:18:22,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27508 states. [2021-07-09 17:18:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27508 to 13479. [2021-07-09 17:18:23,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 2.5634367116782903) internal successors, (34550), 13478 states have internal predecessors, (34550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:23,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34550 transitions. [2021-07-09 17:18:23,124 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34550 transitions. Word has length 59 [2021-07-09 17:18:23,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:23,124 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34550 transitions. [2021-07-09 17:18:23,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 3.1470588235294117) internal successors, (107), 33 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34550 transitions. [2021-07-09 17:18:23,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:23,135 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:23,135 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:23,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:23,351 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:23,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:23,351 INFO L82 PathProgramCache]: Analyzing trace with hash 229597463, now seen corresponding path program 312 times [2021-07-09 17:18:23,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:23,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845775744] [2021-07-09 17:18:23,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:23,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:23,487 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:23,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845775744] [2021-07-09 17:18:23,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845775744] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:23,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742569078] [2021-07-09 17:18:23,487 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 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:23,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:18:23,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:23,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:23,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:23,789 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:23,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742569078] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:23,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:23,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-07-09 17:18:23,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414307720] [2021-07-09 17:18:23,790 INFO L462 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-07-09 17:18:23,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:23,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-07-09 17:18:23,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:18:23,790 INFO L87 Difference]: Start difference. First operand 13479 states and 34550 transitions. Second operand has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 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) [2021-07-09 17:18:24,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:24,629 INFO L93 Difference]: Finished difference Result 13564 states and 34688 transitions. [2021-07-09 17:18:24,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:24,630 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 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 59 [2021-07-09 17:18:24,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:24,649 INFO L225 Difference]: With dead ends: 13564 [2021-07-09 17:18:24,649 INFO L226 Difference]: Without dead ends: 13496 [2021-07-09 17:18:24,649 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 243.3ms TimeCoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:18:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13496 states. [2021-07-09 17:18:24,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13496 to 13479. [2021-07-09 17:18:24,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13479 states, 13478 states have (on average 2.561210862145719) internal successors, (34520), 13478 states have internal predecessors, (34520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:24,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13479 states to 13479 states and 34520 transitions. [2021-07-09 17:18:24,883 INFO L78 Accepts]: Start accepts. Automaton has 13479 states and 34520 transitions. Word has length 59 [2021-07-09 17:18:24,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:24,883 INFO L482 AbstractCegarLoop]: Abstraction has 13479 states and 34520 transitions. [2021-07-09 17:18:24,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 3.5454545454545454) internal successors, (78), 21 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) [2021-07-09 17:18:24,883 INFO L276 IsEmpty]: Start isEmpty. Operand 13479 states and 34520 transitions. [2021-07-09 17:18:24,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:24,895 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:24,895 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:25,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:25,112 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:25,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:25,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1178079806, now seen corresponding path program 313 times [2021-07-09 17:18:25,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:25,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116797045] [2021-07-09 17:18:25,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:25,218 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:25,218 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116797045] [2021-07-09 17:18:25,218 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116797045] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:25,218 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542026285] [2021-07-09 17:18:25,218 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:25,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:25,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:25,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:25,401 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 86 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:25,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1542026285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:25,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:25,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-09 17:18:25,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956674086] [2021-07-09 17:18:25,401 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:25,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:25,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:25,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:25,401 INFO L87 Difference]: Start difference. First operand 13479 states and 34520 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:25,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:25,774 INFO L93 Difference]: Finished difference Result 16700 states and 41187 transitions. [2021-07-09 17:18:25,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:25,775 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:25,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:25,799 INFO L225 Difference]: With dead ends: 16700 [2021-07-09 17:18:25,799 INFO L226 Difference]: Without dead ends: 16700 [2021-07-09 17:18:25,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 171.9ms TimeCoverageRelationStatistics Valid=219, Invalid=381, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:18:25,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16700 states. [2021-07-09 17:18:25,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16700 to 14028. [2021-07-09 17:18:26,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14028 states, 14027 states have (on average 2.578099379767591) internal successors, (36163), 14027 states have internal predecessors, (36163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14028 states to 14028 states and 36163 transitions. [2021-07-09 17:18:26,030 INFO L78 Accepts]: Start accepts. Automaton has 14028 states and 36163 transitions. Word has length 59 [2021-07-09 17:18:26,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:26,030 INFO L482 AbstractCegarLoop]: Abstraction has 14028 states and 36163 transitions. [2021-07-09 17:18:26,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:26,030 INFO L276 IsEmpty]: Start isEmpty. Operand 14028 states and 36163 transitions. [2021-07-09 17:18:26,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:26,042 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:26,042 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:26,243 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1092,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:26,243 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:26,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:26,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1136189813, now seen corresponding path program 153 times [2021-07-09 17:18:26,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:26,243 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069703698] [2021-07-09 17:18:26,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:26,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:26,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:26,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069703698] [2021-07-09 17:18:26,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069703698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:26,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459967826] [2021-07-09 17:18:26,382 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 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:26,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:18:26,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:26,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:26,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:26,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459967826] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:26,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:26,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:18:26,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978151409] [2021-07-09 17:18:26,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:26,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:26,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:26,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:26,499 INFO L87 Difference]: Start difference. First operand 14028 states and 36163 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:27,183 INFO L93 Difference]: Finished difference Result 19202 states and 47249 transitions. [2021-07-09 17:18:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-07-09 17:18:27,183 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:27,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:27,211 INFO L225 Difference]: With dead ends: 19202 [2021-07-09 17:18:27,211 INFO L226 Difference]: Without dead ends: 19070 [2021-07-09 17:18:27,212 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 312.4ms TimeCoverageRelationStatistics Valid=144, Invalid=848, Unknown=0, NotChecked=0, Total=992 [2021-07-09 17:18:27,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19070 states. [2021-07-09 17:18:27,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19070 to 13945. [2021-07-09 17:18:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13945 states, 13944 states have (on average 2.57723752151463) internal successors, (35937), 13944 states have internal predecessors, (35937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:27,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35937 transitions. [2021-07-09 17:18:27,501 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35937 transitions. Word has length 59 [2021-07-09 17:18:27,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:27,501 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35937 transitions. [2021-07-09 17:18:27,501 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:27,502 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35937 transitions. [2021-07-09 17:18:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:27,513 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:27,513 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:27,729 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1093,517 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:27,729 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:27,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:27,730 INFO L82 PathProgramCache]: Analyzing trace with hash 656626997, now seen corresponding path program 314 times [2021-07-09 17:18:27,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:27,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112050032] [2021-07-09 17:18:27,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:27,862 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:27,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:27,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112050032] [2021-07-09 17:18:27,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112050032] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:27,863 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469081946] [2021-07-09 17:18:27,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:27,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:27,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:27,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:27,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:28,094 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:28,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1469081946] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:28,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:28,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 19 [2021-07-09 17:18:28,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141503488] [2021-07-09 17:18:28,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:18:28,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:28,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:18:28,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=333, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:18:28,094 INFO L87 Difference]: Start difference. First operand 13945 states and 35937 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:28,996 INFO L93 Difference]: Finished difference Result 14171 states and 36291 transitions. [2021-07-09 17:18:28,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:18:28,997 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:29,021 INFO L225 Difference]: With dead ends: 14171 [2021-07-09 17:18:29,022 INFO L226 Difference]: Without dead ends: 14115 [2021-07-09 17:18:29,022 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 250.0ms TimeCoverageRelationStatistics Valid=59, Invalid=447, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:18:29,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14115 states. [2021-07-09 17:18:29,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14115 to 13945. [2021-07-09 17:18:29,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13945 states, 13944 states have (on average 2.5748709122203097) internal successors, (35904), 13944 states have internal predecessors, (35904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:29,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13945 states to 13945 states and 35904 transitions. [2021-07-09 17:18:29,262 INFO L78 Accepts]: Start accepts. Automaton has 13945 states and 35904 transitions. Word has length 59 [2021-07-09 17:18:29,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:29,262 INFO L482 AbstractCegarLoop]: Abstraction has 13945 states and 35904 transitions. [2021-07-09 17:18:29,262 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:29,262 INFO L276 IsEmpty]: Start isEmpty. Operand 13945 states and 35904 transitions. [2021-07-09 17:18:29,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:29,274 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:29,274 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:29,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1094,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:29,482 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:29,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:29,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1251305348, now seen corresponding path program 154 times [2021-07-09 17:18:29,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:29,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969620929] [2021-07-09 17:18:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:29,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:29,583 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 52 proven. 124 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:18:29,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:29,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969620929] [2021-07-09 17:18:29,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969620929] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:29,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061331840] [2021-07-09 17:18:29,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:29,683 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:29,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:29,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:29,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:29,768 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 124 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:29,768 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061331840] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:29,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:29,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 15 [2021-07-09 17:18:29,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725695062] [2021-07-09 17:18:29,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:29,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:29,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:29,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:29,769 INFO L87 Difference]: Start difference. First operand 13945 states and 35904 transitions. Second operand has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:30,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:30,072 INFO L93 Difference]: Finished difference Result 16427 states and 40999 transitions. [2021-07-09 17:18:30,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:30,072 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:30,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:30,096 INFO L225 Difference]: With dead ends: 16427 [2021-07-09 17:18:30,096 INFO L226 Difference]: Without dead ends: 16325 [2021-07-09 17:18:30,096 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 140.2ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:18:30,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16325 states. [2021-07-09 17:18:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16325 to 12866. [2021-07-09 17:18:30,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12866 states, 12865 states have (on average 2.5769141080450835) internal successors, (33152), 12865 states have internal predecessors, (33152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:30,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12866 states to 12866 states and 33152 transitions. [2021-07-09 17:18:30,327 INFO L78 Accepts]: Start accepts. Automaton has 12866 states and 33152 transitions. Word has length 59 [2021-07-09 17:18:30,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:30,327 INFO L482 AbstractCegarLoop]: Abstraction has 12866 states and 33152 transitions. [2021-07-09 17:18:30,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.875) internal successors, (62), 15 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:30,327 INFO L276 IsEmpty]: Start isEmpty. Operand 12866 states and 33152 transitions. [2021-07-09 17:18:30,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:30,337 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:30,337 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:30,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1095 [2021-07-09 17:18:30,552 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:30,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:30,552 INFO L82 PathProgramCache]: Analyzing trace with hash -151060374, now seen corresponding path program 315 times [2021-07-09 17:18:30,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:30,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992723772] [2021-07-09 17:18:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:30,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:30,645 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:30,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:30,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992723772] [2021-07-09 17:18:30,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992723772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:30,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995287997] [2021-07-09 17:18:30,645 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 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:30,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-07-09 17:18:30,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:30,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:30,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:30,765 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 93 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:30,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995287997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:30,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:30,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-07-09 17:18:30,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636668201] [2021-07-09 17:18:30,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:30,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:30,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:30,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:30,765 INFO L87 Difference]: Start difference. First operand 12866 states and 33152 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:31,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:31,070 INFO L93 Difference]: Finished difference Result 16089 states and 39723 transitions. [2021-07-09 17:18:31,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:18:31,070 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:31,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:31,094 INFO L225 Difference]: With dead ends: 16089 [2021-07-09 17:18:31,094 INFO L226 Difference]: Without dead ends: 16089 [2021-07-09 17:18:31,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 143.6ms TimeCoverageRelationStatistics Valid=174, Invalid=288, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:18:31,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16089 states. [2021-07-09 17:18:31,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16089 to 13293. [2021-07-09 17:18:31,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13293 states, 13292 states have (on average 2.59043033403551) internal successors, (34432), 13292 states have internal predecessors, (34432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:31,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13293 states to 13293 states and 34432 transitions. [2021-07-09 17:18:31,309 INFO L78 Accepts]: Start accepts. Automaton has 13293 states and 34432 transitions. Word has length 59 [2021-07-09 17:18:31,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:31,309 INFO L482 AbstractCegarLoop]: Abstraction has 13293 states and 34432 transitions. [2021-07-09 17:18:31,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:31,309 INFO L276 IsEmpty]: Start isEmpty. Operand 13293 states and 34432 transitions. [2021-07-09 17:18:31,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:31,319 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:31,319 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:31,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-07-09 17:18:31,520 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:31,520 INFO L82 PathProgramCache]: Analyzing trace with hash 541310423, now seen corresponding path program 155 times [2021-07-09 17:18:31,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:31,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168772462] [2021-07-09 17:18:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:31,642 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:31,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:31,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168772462] [2021-07-09 17:18:31,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168772462] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:31,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370872027] [2021-07-09 17:18:31,642 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 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:31,675 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:18:31,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:31,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:31,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:31,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370872027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:31,758 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:31,758 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-07-09 17:18:31,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111135975] [2021-07-09 17:18:31,758 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:31,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:31,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:31,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:31,758 INFO L87 Difference]: Start difference. First operand 13293 states and 34432 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:32,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:32,490 INFO L93 Difference]: Finished difference Result 17164 states and 42755 transitions. [2021-07-09 17:18:32,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:18:32,491 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:32,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:32,515 INFO L225 Difference]: With dead ends: 17164 [2021-07-09 17:18:32,515 INFO L226 Difference]: Without dead ends: 17150 [2021-07-09 17:18:32,515 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=113, Invalid=699, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:18:32,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17150 states. [2021-07-09 17:18:32,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17150 to 13291. [2021-07-09 17:18:32,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13291 states, 13290 states have (on average 2.593453724604966) internal successors, (34467), 13290 states have internal predecessors, (34467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:32,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34467 transitions. [2021-07-09 17:18:32,731 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34467 transitions. Word has length 59 [2021-07-09 17:18:32,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:32,731 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34467 transitions. [2021-07-09 17:18:32,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:32,731 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34467 transitions. [2021-07-09 17:18:32,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:32,741 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:32,741 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:32,957 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-07-09 17:18:32,957 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:32,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:32,958 INFO L82 PathProgramCache]: Analyzing trace with hash 379258327, now seen corresponding path program 316 times [2021-07-09 17:18:32,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:32,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922590410] [2021-07-09 17:18:32,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:33,076 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:33,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:33,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922590410] [2021-07-09 17:18:33,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [922590410] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:33,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737844736] [2021-07-09 17:18:33,076 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 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:33,105 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:33,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:33,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:33,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:33,272 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:33,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737844736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:33,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:33,272 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 17 [2021-07-09 17:18:33,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881900463] [2021-07-09 17:18:33,272 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:18:33,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:33,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:18:33,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:33,273 INFO L87 Difference]: Start difference. First operand 13291 states and 34467 transitions. Second operand has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:34,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:34,001 INFO L93 Difference]: Finished difference Result 13395 states and 34626 transitions. [2021-07-09 17:18:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:18:34,001 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:34,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:34,020 INFO L225 Difference]: With dead ends: 13395 [2021-07-09 17:18:34,020 INFO L226 Difference]: Without dead ends: 13351 [2021-07-09 17:18:34,020 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:34,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13351 states. [2021-07-09 17:18:34,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13351 to 13291. [2021-07-09 17:18:34,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13291 states, 13290 states have (on average 2.5927765237020317) internal successors, (34458), 13290 states have internal predecessors, (34458), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:34,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13291 states to 13291 states and 34458 transitions. [2021-07-09 17:18:34,207 INFO L78 Accepts]: Start accepts. Automaton has 13291 states and 34458 transitions. Word has length 59 [2021-07-09 17:18:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:34,208 INFO L482 AbstractCegarLoop]: Abstraction has 13291 states and 34458 transitions. [2021-07-09 17:18:34,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.0) internal successors, (72), 17 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:34,208 INFO L276 IsEmpty]: Start isEmpty. Operand 13291 states and 34458 transitions. [2021-07-09 17:18:34,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:34,218 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:34,218 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:34,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1103,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:34,433 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:34,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:34,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1601439350, now seen corresponding path program 156 times [2021-07-09 17:18:34,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:34,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829604931] [2021-07-09 17:18:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:34,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:34,524 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 63 proven. 114 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:34,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:34,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829604931] [2021-07-09 17:18:34,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829604931] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:34,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123876890] [2021-07-09 17:18:34,525 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 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:34,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:18:34,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:34,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:34,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:34,673 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 65 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:34,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123876890] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:34,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:34,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 19 [2021-07-09 17:18:34,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863150417] [2021-07-09 17:18:34,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-07-09 17:18:34,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:34,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-07-09 17:18:34,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:18:34,674 INFO L87 Difference]: Start difference. First operand 13291 states and 34458 transitions. Second operand has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:35,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:35,059 INFO L93 Difference]: Finished difference Result 15297 states and 38508 transitions. [2021-07-09 17:18:35,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:18:35,060 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:35,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:35,080 INFO L225 Difference]: With dead ends: 15297 [2021-07-09 17:18:35,080 INFO L226 Difference]: Without dead ends: 15243 [2021-07-09 17:18:35,080 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 148.3ms TimeCoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2021-07-09 17:18:35,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15243 states. [2021-07-09 17:18:35,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15243 to 13345. [2021-07-09 17:18:35,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13345 states, 13344 states have (on average 2.5953986810551557) internal successors, (34633), 13344 states have internal predecessors, (34633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:35,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13345 states to 13345 states and 34633 transitions. [2021-07-09 17:18:35,291 INFO L78 Accepts]: Start accepts. Automaton has 13345 states and 34633 transitions. Word has length 59 [2021-07-09 17:18:35,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:35,291 INFO L482 AbstractCegarLoop]: Abstraction has 13345 states and 34633 transitions. [2021-07-09 17:18:35,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 3.95) internal successors, (79), 19 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:35,291 INFO L276 IsEmpty]: Start isEmpty. Operand 13345 states and 34633 transitions. [2021-07-09 17:18:35,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:35,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:35,303 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:35,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 523 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1104 [2021-07-09 17:18:35,520 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:35,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:35,520 INFO L82 PathProgramCache]: Analyzing trace with hash 815345346, now seen corresponding path program 317 times [2021-07-09 17:18:35,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:35,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419959334] [2021-07-09 17:18:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:35,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 82 proven. 95 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:35,605 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:35,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419959334] [2021-07-09 17:18:35,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419959334] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:35,605 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292312522] [2021-07-09 17:18:35,605 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 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:35,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:18:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:35,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:35,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:35,744 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 84 proven. 95 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:35,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292312522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:35,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:35,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 16 [2021-07-09 17:18:35,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015298325] [2021-07-09 17:18:35,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:18:35,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:35,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:18:35,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:35,745 INFO L87 Difference]: Start difference. First operand 13345 states and 34633 transitions. Second operand has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:36,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:36,038 INFO L93 Difference]: Finished difference Result 16957 states and 41994 transitions. [2021-07-09 17:18:36,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:36,038 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:36,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:36,068 INFO L225 Difference]: With dead ends: 16957 [2021-07-09 17:18:36,068 INFO L226 Difference]: Without dead ends: 16957 [2021-07-09 17:18:36,069 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 134.6ms TimeCoverageRelationStatistics Valid=173, Invalid=289, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:18:36,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16957 states. [2021-07-09 17:18:36,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16957 to 13816. [2021-07-09 17:18:36,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13816 states, 13815 states have (on average 2.607889974665219) internal successors, (36028), 13815 states have internal predecessors, (36028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:36,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13816 states to 13816 states and 36028 transitions. [2021-07-09 17:18:36,322 INFO L78 Accepts]: Start accepts. Automaton has 13816 states and 36028 transitions. Word has length 59 [2021-07-09 17:18:36,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:36,322 INFO L482 AbstractCegarLoop]: Abstraction has 13816 states and 36028 transitions. [2021-07-09 17:18:36,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.0588235294117645) internal successors, (69), 16 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:36,322 INFO L276 IsEmpty]: Start isEmpty. Operand 13816 states and 36028 transitions. [2021-07-09 17:18:36,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:36,333 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:36,333 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:36,548 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 524 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-07-09 17:18:36,548 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:36,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:36,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1926034251, now seen corresponding path program 157 times [2021-07-09 17:18:36,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:36,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614611111] [2021-07-09 17:18:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:36,647 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:36,647 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:36,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614611111] [2021-07-09 17:18:36,647 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614611111] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:36,647 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524464938] [2021-07-09 17:18:36,647 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 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:36,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:36,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:36,765 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:36,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524464938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:36,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:36,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:18:36,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730306266] [2021-07-09 17:18:36,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:36,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:36,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:36,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:36,766 INFO L87 Difference]: Start difference. First operand 13816 states and 36028 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:37,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:37,474 INFO L93 Difference]: Finished difference Result 16406 states and 41478 transitions. [2021-07-09 17:18:37,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:18:37,474 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:37,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:37,500 INFO L225 Difference]: With dead ends: 16406 [2021-07-09 17:18:37,500 INFO L226 Difference]: Without dead ends: 16388 [2021-07-09 17:18:37,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=88, Invalid=562, Unknown=0, NotChecked=0, Total=650 [2021-07-09 17:18:37,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16388 states. [2021-07-09 17:18:37,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16388 to 13495. [2021-07-09 17:18:37,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 2.6217578182896104) internal successors, (35378), 13494 states have internal predecessors, (35378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:37,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35378 transitions. [2021-07-09 17:18:37,812 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35378 transitions. Word has length 59 [2021-07-09 17:18:37,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:37,812 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35378 transitions. [2021-07-09 17:18:37,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:37,812 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35378 transitions. [2021-07-09 17:18:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:37,822 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:37,822 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:38,038 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1111 [2021-07-09 17:18:38,038 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:38,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:38,038 INFO L82 PathProgramCache]: Analyzing trace with hash -2102925195, now seen corresponding path program 318 times [2021-07-09 17:18:38,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:38,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90041770] [2021-07-09 17:18:38,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:38,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:38,145 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:38,145 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:38,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90041770] [2021-07-09 17:18:38,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90041770] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:38,145 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296004266] [2021-07-09 17:18:38,145 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:38,177 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:18:38,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:38,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:38,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:38,317 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:38,317 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296004266] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:38,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:38,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 15 [2021-07-09 17:18:38,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246222088] [2021-07-09 17:18:38,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:38,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:38,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:38,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:38,318 INFO L87 Difference]: Start difference. First operand 13495 states and 35378 transitions. Second operand has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:38,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:38,817 INFO L93 Difference]: Finished difference Result 13544 states and 35453 transitions. [2021-07-09 17:18:38,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:38,818 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:38,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:38,837 INFO L225 Difference]: With dead ends: 13544 [2021-07-09 17:18:38,838 INFO L226 Difference]: Without dead ends: 13512 [2021-07-09 17:18:38,838 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 135.5ms TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13512 states. [2021-07-09 17:18:38,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13512 to 13495. [2021-07-09 17:18:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13495 states, 13494 states have (on average 2.621313176226471) internal successors, (35372), 13494 states have internal predecessors, (35372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:39,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13495 states to 13495 states and 35372 transitions. [2021-07-09 17:18:39,028 INFO L78 Accepts]: Start accepts. Automaton has 13495 states and 35372 transitions. Word has length 59 [2021-07-09 17:18:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:39,029 INFO L482 AbstractCegarLoop]: Abstraction has 13495 states and 35372 transitions. [2021-07-09 17:18:39,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.3125) internal successors, (69), 15 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:39,029 INFO L276 IsEmpty]: Start isEmpty. Operand 13495 states and 35372 transitions. [2021-07-09 17:18:39,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:39,038 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:39,038 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:39,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-07-09 17:18:39,254 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:39,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:39,255 INFO L82 PathProgramCache]: Analyzing trace with hash 513630058, now seen corresponding path program 319 times [2021-07-09 17:18:39,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:39,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900394881] [2021-07-09 17:18:39,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:39,329 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 80 proven. 97 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:39,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:39,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900394881] [2021-07-09 17:18:39,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900394881] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:39,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602747255] [2021-07-09 17:18:39,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:39,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:39,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:18:39,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:39,461 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 121 proven. 56 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:39,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602747255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:39,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:39,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-07-09 17:18:39,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396323484] [2021-07-09 17:18:39,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:39,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:39,462 INFO L87 Difference]: Start difference. First operand 13495 states and 35372 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 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) [2021-07-09 17:18:39,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:39,710 INFO L93 Difference]: Finished difference Result 16977 states and 42453 transitions. [2021-07-09 17:18:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:18:39,711 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 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 59 [2021-07-09 17:18:39,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:39,742 INFO L225 Difference]: With dead ends: 16977 [2021-07-09 17:18:39,742 INFO L226 Difference]: Without dead ends: 16977 [2021-07-09 17:18:39,742 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 104.0ms TimeCoverageRelationStatistics Valid=128, Invalid=178, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:39,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16977 states. [2021-07-09 17:18:40,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16977 to 14002. [2021-07-09 17:18:40,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14002 states, 14001 states have (on average 2.633454753231912) internal successors, (36871), 14001 states have internal predecessors, (36871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:40,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14002 states to 14002 states and 36871 transitions. [2021-07-09 17:18:40,143 INFO L78 Accepts]: Start accepts. Automaton has 14002 states and 36871 transitions. Word has length 59 [2021-07-09 17:18:40,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:40,143 INFO L482 AbstractCegarLoop]: Abstraction has 14002 states and 36871 transitions. [2021-07-09 17:18:40,143 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 14 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) [2021-07-09 17:18:40,143 INFO L276 IsEmpty]: Start isEmpty. Operand 14002 states and 36871 transitions. [2021-07-09 17:18:40,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:40,154 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:40,154 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:40,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 527 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1113 [2021-07-09 17:18:40,370 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:40,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:40,370 INFO L82 PathProgramCache]: Analyzing trace with hash -257205609, now seen corresponding path program 158 times [2021-07-09 17:18:40,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:40,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136262222] [2021-07-09 17:18:40,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:40,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:40,457 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:40,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:40,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136262222] [2021-07-09 17:18:40,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136262222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:40,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767025612] [2021-07-09 17:18:40,458 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 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:40,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:40,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:40,495 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:40,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:40,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767025612] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:40,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:40,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:18:40,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801245644] [2021-07-09 17:18:40,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:18:40,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:18:40,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:40,578 INFO L87 Difference]: Start difference. First operand 14002 states and 36871 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:41,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:41,170 INFO L93 Difference]: Finished difference Result 15466 states and 39872 transitions. [2021-07-09 17:18:41,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:18:41,170 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:41,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:41,193 INFO L225 Difference]: With dead ends: 15466 [2021-07-09 17:18:41,193 INFO L226 Difference]: Without dead ends: 15466 [2021-07-09 17:18:41,193 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 179.6ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:18:41,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15466 states. [2021-07-09 17:18:41,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15466 to 14020. [2021-07-09 17:18:41,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 14019 states have (on average 2.6337113916827164) internal successors, (36922), 14019 states have internal predecessors, (36922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36922 transitions. [2021-07-09 17:18:41,427 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36922 transitions. Word has length 59 [2021-07-09 17:18:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:41,427 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36922 transitions. [2021-07-09 17:18:41,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:41,428 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36922 transitions. [2021-07-09 17:18:41,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:41,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:41,438 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:41,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 528 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1116 [2021-07-09 17:18:41,655 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:41,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:41,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1890501993, now seen corresponding path program 320 times [2021-07-09 17:18:41,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:41,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50423766] [2021-07-09 17:18:41,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:41,748 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 18 proven. 157 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:41,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:41,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50423766] [2021-07-09 17:18:41,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50423766] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:41,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013473140] [2021-07-09 17:18:41,749 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 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:41,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:41,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:41,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:41,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:41,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1013473140] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:41,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:41,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2021-07-09 17:18:41,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007991975] [2021-07-09 17:18:41,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:41,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:41,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:41,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:41,888 INFO L87 Difference]: Start difference. First operand 14020 states and 36922 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) [2021-07-09 17:18:42,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:42,292 INFO L93 Difference]: Finished difference Result 14088 states and 37021 transitions. [2021-07-09 17:18:42,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:42,293 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 59 [2021-07-09 17:18:42,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:42,314 INFO L225 Difference]: With dead ends: 14088 [2021-07-09 17:18:42,314 INFO L226 Difference]: Without dead ends: 14068 [2021-07-09 17:18:42,314 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:42,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14068 states. [2021-07-09 17:18:42,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14068 to 14020. [2021-07-09 17:18:42,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14020 states, 14019 states have (on average 2.6334973963906125) internal successors, (36919), 14019 states have internal predecessors, (36919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:42,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14020 states to 14020 states and 36919 transitions. [2021-07-09 17:18:42,598 INFO L78 Accepts]: Start accepts. Automaton has 14020 states and 36919 transitions. Word has length 59 [2021-07-09 17:18:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:42,598 INFO L482 AbstractCegarLoop]: Abstraction has 14020 states and 36919 transitions. [2021-07-09 17:18:42,599 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) [2021-07-09 17:18:42,599 INFO L276 IsEmpty]: Start isEmpty. Operand 14020 states and 36919 transitions. [2021-07-09 17:18:42,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:42,609 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:42,609 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:42,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1117,529 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:42,825 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:42,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:42,825 INFO L82 PathProgramCache]: Analyzing trace with hash -336914294, now seen corresponding path program 159 times [2021-07-09 17:18:42,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:42,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761805842] [2021-07-09 17:18:42,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:42,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:42,901 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 77 proven. 100 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:42,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761805842] [2021-07-09 17:18:42,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761805842] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:42,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545268973] [2021-07-09 17:18:42,902 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 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:42,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-07-09 17:18:42,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:42,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:43,023 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 78 proven. 100 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:43,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [545268973] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:43,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:43,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:18:43,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369160042] [2021-07-09 17:18:43,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:43,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:43,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:43,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:43,024 INFO L87 Difference]: Start difference. First operand 14020 states and 36919 transitions. Second operand has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:43,235 INFO L93 Difference]: Finished difference Result 15125 states and 39073 transitions. [2021-07-09 17:18:43,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:43,235 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:43,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:43,258 INFO L225 Difference]: With dead ends: 15125 [2021-07-09 17:18:43,258 INFO L226 Difference]: Without dead ends: 15103 [2021-07-09 17:18:43,258 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:43,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15103 states. [2021-07-09 17:18:43,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15103 to 13957. [2021-07-09 17:18:43,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13957 states, 13956 states have (on average 2.635640584694755) internal successors, (36783), 13956 states have internal predecessors, (36783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:43,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13957 states to 13957 states and 36783 transitions. [2021-07-09 17:18:43,484 INFO L78 Accepts]: Start accepts. Automaton has 13957 states and 36783 transitions. Word has length 59 [2021-07-09 17:18:43,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:43,484 INFO L482 AbstractCegarLoop]: Abstraction has 13957 states and 36783 transitions. [2021-07-09 17:18:43,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.428571428571429) internal successors, (62), 13 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:43,484 INFO L276 IsEmpty]: Start isEmpty. Operand 13957 states and 36783 transitions. [2021-07-09 17:18:43,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:43,494 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:43,494 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:43,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1118,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:43,710 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:43,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:43,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1535027189, now seen corresponding path program 160 times [2021-07-09 17:18:43,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:43,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349129426] [2021-07-09 17:18:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:43,800 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:43,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:43,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349129426] [2021-07-09 17:18:43,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349129426] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:43,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559234132] [2021-07-09 17:18:43,800 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:43,829 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:43,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:43,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:43,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 8 proven. 167 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:43,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559234132] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:43,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:43,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:18:43,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727154309] [2021-07-09 17:18:43,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:43,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:43,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:43,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:43,914 INFO L87 Difference]: Start difference. First operand 13957 states and 36783 transitions. Second operand has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:44,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:44,507 INFO L93 Difference]: Finished difference Result 14854 states and 38533 transitions. [2021-07-09 17:18:44,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:18:44,508 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:44,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:44,537 INFO L225 Difference]: With dead ends: 14854 [2021-07-09 17:18:44,537 INFO L226 Difference]: Without dead ends: 14846 [2021-07-09 17:18:44,537 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 151.7ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:44,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14846 states. [2021-07-09 17:18:44,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14846 to 14042. [2021-07-09 17:18:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14042 states, 14041 states have (on average 2.6336443273271133) internal successors, (36979), 14041 states have internal predecessors, (36979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:44,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14042 states to 14042 states and 36979 transitions. [2021-07-09 17:18:44,797 INFO L78 Accepts]: Start accepts. Automaton has 14042 states and 36979 transitions. Word has length 59 [2021-07-09 17:18:44,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:44,797 INFO L482 AbstractCegarLoop]: Abstraction has 14042 states and 36979 transitions. [2021-07-09 17:18:44,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.0) internal successors, (60), 11 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:44,797 INFO L276 IsEmpty]: Start isEmpty. Operand 14042 states and 36979 transitions. [2021-07-09 17:18:44,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:44,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:44,807 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:45,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1122 [2021-07-09 17:18:45,023 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:45,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:45,024 INFO L82 PathProgramCache]: Analyzing trace with hash -1259607115, now seen corresponding path program 321 times [2021-07-09 17:18:45,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:45,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788245424] [2021-07-09 17:18:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 19 proven. 156 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:45,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:45,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788245424] [2021-07-09 17:18:45,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788245424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:45,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610679347] [2021-07-09 17:18:45,107 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 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:45,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:18:45,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:45,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:45,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:45,232 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 15 proven. 160 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:45,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610679347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:45,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:45,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-07-09 17:18:45,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605681007] [2021-07-09 17:18:45,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:45,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:45,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:45,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:45,232 INFO L87 Difference]: Start difference. First operand 14042 states and 36979 transitions. Second operand has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 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) [2021-07-09 17:18:45,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:45,963 INFO L93 Difference]: Finished difference Result 14554 states and 37840 transitions. [2021-07-09 17:18:45,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:18:45,963 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 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 59 [2021-07-09 17:18:45,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:45,986 INFO L225 Difference]: With dead ends: 14554 [2021-07-09 17:18:45,986 INFO L226 Difference]: Without dead ends: 14403 [2021-07-09 17:18:45,986 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 150.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:45,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14403 states. [2021-07-09 17:18:46,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14403 to 13894. [2021-07-09 17:18:46,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13894 states, 13893 states have (on average 2.636723529835169) internal successors, (36632), 13893 states have internal predecessors, (36632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:46,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13894 states to 13894 states and 36632 transitions. [2021-07-09 17:18:46,213 INFO L78 Accepts]: Start accepts. Automaton has 13894 states and 36632 transitions. Word has length 59 [2021-07-09 17:18:46,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:46,214 INFO L482 AbstractCegarLoop]: Abstraction has 13894 states and 36632 transitions. [2021-07-09 17:18:46,214 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.333333333333333) internal successors, (64), 11 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) [2021-07-09 17:18:46,214 INFO L276 IsEmpty]: Start isEmpty. Operand 13894 states and 36632 transitions. [2021-07-09 17:18:46,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:46,224 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:46,224 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:46,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 532 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1123 [2021-07-09 17:18:46,440 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:46,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:46,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1873143295, now seen corresponding path program 322 times [2021-07-09 17:18:46,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:46,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451680641] [2021-07-09 17:18:46,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:46,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:46,531 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 157 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:18:46,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:46,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451680641] [2021-07-09 17:18:46,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451680641] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:46,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463383222] [2021-07-09 17:18:46,531 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 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:46,561 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:46,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:46,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:46,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 158 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:18:46,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463383222] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:46,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:46,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-07-09 17:18:46,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148009084] [2021-07-09 17:18:46,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:18:46,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:46,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:18:46,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:18:46,645 INFO L87 Difference]: Start difference. First operand 13894 states and 36632 transitions. Second operand has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:47,141 INFO L93 Difference]: Finished difference Result 14649 states and 38103 transitions. [2021-07-09 17:18:47,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-09 17:18:47,142 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:47,163 INFO L225 Difference]: With dead ends: 14649 [2021-07-09 17:18:47,164 INFO L226 Difference]: Without dead ends: 14637 [2021-07-09 17:18:47,164 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 63 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 149.9ms TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14637 states. [2021-07-09 17:18:47,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14637 to 13896. [2021-07-09 17:18:47,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13896 states, 13895 states have (on average 2.6366318819719323) internal successors, (36636), 13895 states have internal predecessors, (36636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13896 states to 13896 states and 36636 transitions. [2021-07-09 17:18:47,381 INFO L78 Accepts]: Start accepts. Automaton has 13896 states and 36636 transitions. Word has length 59 [2021-07-09 17:18:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:47,382 INFO L482 AbstractCegarLoop]: Abstraction has 13896 states and 36636 transitions. [2021-07-09 17:18:47,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.916666666666667) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 13896 states and 36636 transitions. [2021-07-09 17:18:47,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:47,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:47,393 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:47,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 533 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1124 [2021-07-09 17:18:47,609 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:47,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:47,609 INFO L82 PathProgramCache]: Analyzing trace with hash 773466498, now seen corresponding path program 323 times [2021-07-09 17:18:47,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:47,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225897203] [2021-07-09 17:18:47,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:47,681 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 75 proven. 103 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:47,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:47,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225897203] [2021-07-09 17:18:47,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225897203] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:47,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925697466] [2021-07-09 17:18:47,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:47,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:18:47,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:47,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:47,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:47,815 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 76 proven. 103 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:18:47,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925697466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:47,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:47,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 14 [2021-07-09 17:18:47,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65100056] [2021-07-09 17:18:47,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:18:47,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:47,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:18:47,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:47,816 INFO L87 Difference]: Start difference. First operand 13896 states and 36636 transitions. Second operand has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:48,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:48,011 INFO L93 Difference]: Finished difference Result 16479 states and 41384 transitions. [2021-07-09 17:18:48,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:18:48,011 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:48,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:48,036 INFO L225 Difference]: With dead ends: 16479 [2021-07-09 17:18:48,036 INFO L226 Difference]: Without dead ends: 16473 [2021-07-09 17:18:48,036 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16473 states. [2021-07-09 17:18:48,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16473 to 13895. [2021-07-09 17:18:48,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13895 states, 13894 states have (on average 2.6363178350367065) internal successors, (36629), 13894 states have internal predecessors, (36629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:48,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13895 states to 13895 states and 36629 transitions. [2021-07-09 17:18:48,374 INFO L78 Accepts]: Start accepts. Automaton has 13895 states and 36629 transitions. Word has length 59 [2021-07-09 17:18:48,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:48,374 INFO L482 AbstractCegarLoop]: Abstraction has 13895 states and 36629 transitions. [2021-07-09 17:18:48,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.733333333333333) internal successors, (71), 14 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:48,374 INFO L276 IsEmpty]: Start isEmpty. Operand 13895 states and 36629 transitions. [2021-07-09 17:18:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:48,385 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:48,385 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:48,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1125,534 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:48,601 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:48,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:48,602 INFO L82 PathProgramCache]: Analyzing trace with hash 268774039, now seen corresponding path program 324 times [2021-07-09 17:18:48,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:48,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652540919] [2021-07-09 17:18:48,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:48,690 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:48,690 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:48,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652540919] [2021-07-09 17:18:48,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1652540919] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:48,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112399575] [2021-07-09 17:18:48,690 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 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:48,722 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:18:48,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:48,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:48,810 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:48,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112399575] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:48,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:48,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:18:48,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256581388] [2021-07-09 17:18:48,811 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:18:48,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:48,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:18:48,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:48,811 INFO L87 Difference]: Start difference. First operand 13895 states and 36629 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:49,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:49,676 INFO L93 Difference]: Finished difference Result 16130 states and 41196 transitions. [2021-07-09 17:18:49,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-09 17:18:49,677 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:49,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:49,701 INFO L225 Difference]: With dead ends: 16130 [2021-07-09 17:18:49,701 INFO L226 Difference]: Without dead ends: 16076 [2021-07-09 17:18:49,702 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 311.6ms TimeCoverageRelationStatistics Valid=141, Invalid=1049, Unknown=0, NotChecked=0, Total=1190 [2021-07-09 17:18:49,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16076 states. [2021-07-09 17:18:49,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16076 to 14050. [2021-07-09 17:18:49,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 2.6358459676845327) internal successors, (37031), 14049 states have internal predecessors, (37031), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:49,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37031 transitions. [2021-07-09 17:18:49,930 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37031 transitions. Word has length 59 [2021-07-09 17:18:49,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:49,930 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37031 transitions. [2021-07-09 17:18:49,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:49,930 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37031 transitions. [2021-07-09 17:18:49,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:49,940 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:49,940 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:50,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1128 [2021-07-09 17:18:50,157 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1801333148, now seen corresponding path program 325 times [2021-07-09 17:18:50,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:50,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442473088] [2021-07-09 17:18:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:50,238 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:50,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:50,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442473088] [2021-07-09 17:18:50,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442473088] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:50,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545068651] [2021-07-09 17:18:50,239 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 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:50,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:50,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:50,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:50,355 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 69 proven. 109 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:50,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545068651] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:50,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:50,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:18:50,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704490128] [2021-07-09 17:18:50,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:18:50,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:50,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:18:50,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:18:50,357 INFO L87 Difference]: Start difference. First operand 14050 states and 37031 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:50,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:50,554 INFO L93 Difference]: Finished difference Result 16536 states and 41568 transitions. [2021-07-09 17:18:50,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:18:50,554 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:50,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:50,581 INFO L225 Difference]: With dead ends: 16536 [2021-07-09 17:18:50,581 INFO L226 Difference]: Without dead ends: 16518 [2021-07-09 17:18:50,581 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 83.1ms TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:18:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16518 states. [2021-07-09 17:18:50,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16518 to 14050. [2021-07-09 17:18:50,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14050 states, 14049 states have (on average 2.6353477115808954) internal successors, (37024), 14049 states have internal predecessors, (37024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:50,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14050 states to 14050 states and 37024 transitions. [2021-07-09 17:18:50,954 INFO L78 Accepts]: Start accepts. Automaton has 14050 states and 37024 transitions. Word has length 59 [2021-07-09 17:18:50,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:50,954 INFO L482 AbstractCegarLoop]: Abstraction has 14050 states and 37024 transitions. [2021-07-09 17:18:50,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:50,954 INFO L276 IsEmpty]: Start isEmpty. Operand 14050 states and 37024 transitions. [2021-07-09 17:18:50,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:50,964 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:50,964 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:51,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1129 [2021-07-09 17:18:51,180 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:51,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:51,180 INFO L82 PathProgramCache]: Analyzing trace with hash 423610573, now seen corresponding path program 326 times [2021-07-09 17:18:51,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:51,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133725746] [2021-07-09 17:18:51,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:51,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:51,281 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:51,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:51,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133725746] [2021-07-09 17:18:51,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2133725746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:51,282 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571119596] [2021-07-09 17:18:51,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:51,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:18:51,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:51,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:18:51,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:51,425 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:18:51,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:18:51,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:18:51,428 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:18:51,428 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:18:51,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:18:51,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:18:51,435 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:51,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571119596] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:51,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:51,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 16 [2021-07-09 17:18:51,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523781537] [2021-07-09 17:18:51,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:18:51,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:51,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:18:51,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:51,435 INFO L87 Difference]: Start difference. First operand 14050 states and 37024 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:52,811 INFO L93 Difference]: Finished difference Result 19628 states and 48599 transitions. [2021-07-09 17:18:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-07-09 17:18:52,811 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:52,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:52,841 INFO L225 Difference]: With dead ends: 19628 [2021-07-09 17:18:52,841 INFO L226 Difference]: Without dead ends: 19460 [2021-07-09 17:18:52,842 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 684.8ms TimeCoverageRelationStatistics Valid=375, Invalid=3531, Unknown=0, NotChecked=0, Total=3906 [2021-07-09 17:18:52,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19460 states. [2021-07-09 17:18:53,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19460 to 14519. [2021-07-09 17:18:53,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14519 states, 14518 states have (on average 2.627910180465629) internal successors, (38152), 14518 states have internal predecessors, (38152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:53,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38152 transitions. [2021-07-09 17:18:53,141 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38152 transitions. Word has length 59 [2021-07-09 17:18:53,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:53,141 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38152 transitions. [2021-07-09 17:18:53,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 16 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:53,141 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38152 transitions. [2021-07-09 17:18:53,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:53,153 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:53,153 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:53,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 537 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1133 [2021-07-09 17:18:53,369 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:53,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:53,369 INFO L82 PathProgramCache]: Analyzing trace with hash 810213250, now seen corresponding path program 327 times [2021-07-09 17:18:53,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:53,370 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431495349] [2021-07-09 17:18:53,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:53,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:53,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431495349] [2021-07-09 17:18:53,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431495349] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:53,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119300502] [2021-07-09 17:18:53,459 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 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:53,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:18:53,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:53,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:53,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:53,571 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 58 proven. 120 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:53,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119300502] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:53,572 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:53,572 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:18:53,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877776541] [2021-07-09 17:18:53,572 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:18:53,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:53,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:18:53,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:18:53,572 INFO L87 Difference]: Start difference. First operand 14519 states and 38152 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:53,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:53,794 INFO L93 Difference]: Finished difference Result 17127 states and 42923 transitions. [2021-07-09 17:18:53,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-09 17:18:53,794 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:53,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:53,820 INFO L225 Difference]: With dead ends: 17127 [2021-07-09 17:18:53,820 INFO L226 Difference]: Without dead ends: 17100 [2021-07-09 17:18:53,820 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 99.9ms TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:18:53,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17100 states. [2021-07-09 17:18:54,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17100 to 14519. [2021-07-09 17:18:54,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14519 states, 14518 states have (on average 2.6277035404325666) internal successors, (38149), 14518 states have internal predecessors, (38149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:54,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14519 states to 14519 states and 38149 transitions. [2021-07-09 17:18:54,156 INFO L78 Accepts]: Start accepts. Automaton has 14519 states and 38149 transitions. Word has length 59 [2021-07-09 17:18:54,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:54,156 INFO L482 AbstractCegarLoop]: Abstraction has 14519 states and 38149 transitions. [2021-07-09 17:18:54,156 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:54,156 INFO L276 IsEmpty]: Start isEmpty. Operand 14519 states and 38149 transitions. [2021-07-09 17:18:54,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:54,166 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:54,166 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:54,382 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 538 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-07-09 17:18:54,382 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash 363919063, now seen corresponding path program 328 times [2021-07-09 17:18:54,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:54,382 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205229590] [2021-07-09 17:18:54,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:54,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:54,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:54,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205229590] [2021-07-09 17:18:54,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205229590] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:54,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369466357] [2021-07-09 17:18:54,492 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 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:54,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:18:54,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:54,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:18:54,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:54,649 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:18:54,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:18:54,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:18:54,652 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:18:54,653 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:18:54,653 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:18:54,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:18:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:54,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369466357] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:54,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:54,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 18 [2021-07-09 17:18:54,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365472050] [2021-07-09 17:18:54,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:18:54,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:54,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:18:54,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:18:54,660 INFO L87 Difference]: Start difference. First operand 14519 states and 38149 transitions. Second operand has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:57,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:57,111 INFO L93 Difference]: Finished difference Result 27358 states and 65118 transitions. [2021-07-09 17:18:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-07-09 17:18:57,112 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:57,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:57,157 INFO L225 Difference]: With dead ends: 27358 [2021-07-09 17:18:57,157 INFO L226 Difference]: Without dead ends: 26914 [2021-07-09 17:18:57,158 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4638 ImplicationChecksByTransitivity, 1392.7ms TimeCoverageRelationStatistics Valid=969, Invalid=11241, Unknown=0, NotChecked=0, Total=12210 [2021-07-09 17:18:57,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26914 states. [2021-07-09 17:18:57,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26914 to 15487. [2021-07-09 17:18:57,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15487 states, 15486 states have (on average 2.61139093374661) internal successors, (40440), 15486 states have internal predecessors, (40440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40440 transitions. [2021-07-09 17:18:57,599 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40440 transitions. Word has length 59 [2021-07-09 17:18:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:57,599 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40440 transitions. [2021-07-09 17:18:57,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.5789473684210527) internal successors, (68), 18 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40440 transitions. [2021-07-09 17:18:57,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:57,610 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:57,610 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:57,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1139,539 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:57,826 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:57,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:57,826 INFO L82 PathProgramCache]: Analyzing trace with hash -2037475364, now seen corresponding path program 329 times [2021-07-09 17:18:57,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:57,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575998994] [2021-07-09 17:18:57,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:57,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:57,924 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:57,924 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:57,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575998994] [2021-07-09 17:18:57,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1575998994] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:57,925 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1083660940] [2021-07-09 17:18:57,925 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 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:57,956 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-07-09 17:18:57,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:57,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:18:57,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:58,066 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 53 proven. 125 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:18:58,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1083660940] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:58,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:58,066 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 17 [2021-07-09 17:18:58,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127716545] [2021-07-09 17:18:58,066 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-09 17:18:58,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:58,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-09 17:18:58,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:18:58,066 INFO L87 Difference]: Start difference. First operand 15487 states and 40440 transitions. Second operand has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:58,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:18:58,365 INFO L93 Difference]: Finished difference Result 18492 states and 46004 transitions. [2021-07-09 17:18:58,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-09 17:18:58,365 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:18:58,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:18:58,395 INFO L225 Difference]: With dead ends: 18492 [2021-07-09 17:18:58,396 INFO L226 Difference]: Without dead ends: 18456 [2021-07-09 17:18:58,396 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 146.9ms TimeCoverageRelationStatistics Valid=136, Invalid=326, Unknown=0, NotChecked=0, Total=462 [2021-07-09 17:18:58,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18456 states. [2021-07-09 17:18:58,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18456 to 15487. [2021-07-09 17:18:58,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15487 states, 15486 states have (on average 2.611197210383572) internal successors, (40437), 15486 states have internal predecessors, (40437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15487 states to 15487 states and 40437 transitions. [2021-07-09 17:18:58,679 INFO L78 Accepts]: Start accepts. Automaton has 15487 states and 40437 transitions. Word has length 59 [2021-07-09 17:18:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:18:58,679 INFO L482 AbstractCegarLoop]: Abstraction has 15487 states and 40437 transitions. [2021-07-09 17:18:58,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.9444444444444446) internal successors, (71), 17 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:18:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 15487 states and 40437 transitions. [2021-07-09 17:18:58,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:18:58,690 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:18:58,690 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:18:58,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:58,907 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:18:58,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:18:58,907 INFO L82 PathProgramCache]: Analyzing trace with hash 210605197, now seen corresponding path program 330 times [2021-07-09 17:18:58,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:18:58,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872418369] [2021-07-09 17:18:58,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:18:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:18:59,030 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:59,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:18:59,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872418369] [2021-07-09 17:18:59,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872418369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:59,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337577488] [2021-07-09 17:18:59,031 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 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:18:59,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:18:59,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:18:59,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:18:59,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:18:59,145 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 159 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:18:59,145 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337577488] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:18:59,145 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:18:59,145 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 15 [2021-07-09 17:18:59,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200209110] [2021-07-09 17:18:59,145 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:18:59,145 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:18:59,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:18:59,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:18:59,146 INFO L87 Difference]: Start difference. First operand 15487 states and 40437 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:03,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:03,127 INFO L93 Difference]: Finished difference Result 44514 states and 101971 transitions. [2021-07-09 17:19:03,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2021-07-09 17:19:03,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:03,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:03,203 INFO L225 Difference]: With dead ends: 44514 [2021-07-09 17:19:03,203 INFO L226 Difference]: Without dead ends: 43374 [2021-07-09 17:19:03,207 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15415 ImplicationChecksByTransitivity, 2764.5ms TimeCoverageRelationStatistics Valid=2427, Invalid=33863, Unknown=0, NotChecked=0, Total=36290 [2021-07-09 17:19:03,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43374 states. [2021-07-09 17:19:03,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43374 to 17204. [2021-07-09 17:19:03,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 17203 states have (on average 2.5862349590187756) internal successors, (44491), 17203 states have internal predecessors, (44491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:03,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44491 transitions. [2021-07-09 17:19:03,765 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44491 transitions. Word has length 59 [2021-07-09 17:19:03,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:03,765 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44491 transitions. [2021-07-09 17:19:03,765 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:03,765 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44491 transitions. [2021-07-09 17:19:03,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:19:03,776 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:03,776 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:03,992 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 541 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-07-09 17:19:03,992 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:03,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:03,993 INFO L82 PathProgramCache]: Analyzing trace with hash 960022850, now seen corresponding path program 331 times [2021-07-09 17:19:03,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:03,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766096352] [2021-07-09 17:19:03,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:03,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:04,100 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:04,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:04,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766096352] [2021-07-09 17:19:04,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766096352] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:04,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989966337] [2021-07-09 17:19:04,100 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 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:04,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:19:04,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:04,211 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 54 proven. 124 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:04,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989966337] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:04,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:04,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-07-09 17:19:04,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274417242] [2021-07-09 17:19:04,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:19:04,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:04,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:19:04,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:19:04,212 INFO L87 Difference]: Start difference. First operand 17204 states and 44491 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:04,474 INFO L93 Difference]: Finished difference Result 20471 states and 50544 transitions. [2021-07-09 17:19:04,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:19:04,475 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:04,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:04,508 INFO L225 Difference]: With dead ends: 20471 [2021-07-09 17:19:04,508 INFO L226 Difference]: Without dead ends: 20426 [2021-07-09 17:19:04,508 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 137.6ms TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:19:04,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20426 states. [2021-07-09 17:19:04,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20426 to 17204. [2021-07-09 17:19:04,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17204 states, 17203 states have (on average 2.586060570830669) internal successors, (44488), 17203 states have internal predecessors, (44488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:04,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17204 states to 17204 states and 44488 transitions. [2021-07-09 17:19:04,815 INFO L78 Accepts]: Start accepts. Automaton has 17204 states and 44488 transitions. Word has length 59 [2021-07-09 17:19:04,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:04,815 INFO L482 AbstractCegarLoop]: Abstraction has 17204 states and 44488 transitions. [2021-07-09 17:19:04,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:04,815 INFO L276 IsEmpty]: Start isEmpty. Operand 17204 states and 44488 transitions. [2021-07-09 17:19:04,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:19:04,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:04,827 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:05,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1147,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:05,043 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash -1612541161, now seen corresponding path program 332 times [2021-07-09 17:19:05,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:05,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564394938] [2021-07-09 17:19:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:05,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:05,340 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:19:05,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:05,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564394938] [2021-07-09 17:19:05,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564394938] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:05,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1901849739] [2021-07-09 17:19:05,341 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 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:05,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:19:05,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:05,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:19:05,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:05,564 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:19:05,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:19:05,565 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:19:05,567 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:19:05,567 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:19:05,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:19:05,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:19:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:19:05,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1901849739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:05,574 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:05,575 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 22 [2021-07-09 17:19:05,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143768149] [2021-07-09 17:19:05,575 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-07-09 17:19:05,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:05,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-07-09 17:19:05,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=449, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:19:05,575 INFO L87 Difference]: Start difference. First operand 17204 states and 44488 transitions. Second operand has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:12,523 INFO L93 Difference]: Finished difference Result 88879 states and 197085 transitions. [2021-07-09 17:19:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 319 states. [2021-07-09 17:19:12,523 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:12,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:12,697 INFO L225 Difference]: With dead ends: 88879 [2021-07-09 17:19:12,697 INFO L226 Difference]: Without dead ends: 85405 [2021-07-09 17:19:12,704 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45804 ImplicationChecksByTransitivity, 5300.8ms TimeCoverageRelationStatistics Valid=5829, Invalid=95613, Unknown=0, NotChecked=0, Total=101442 [2021-07-09 17:19:13,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85405 states. [2021-07-09 17:19:13,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85405 to 19930. [2021-07-09 17:19:13,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19930 states, 19929 states have (on average 2.5569270911736663) internal successors, (50957), 19929 states have internal predecessors, (50957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:13,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50957 transitions. [2021-07-09 17:19:13,688 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50957 transitions. Word has length 59 [2021-07-09 17:19:13,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:13,688 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50957 transitions. [2021-07-09 17:19:13,688 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 3.217391304347826) internal successors, (74), 22 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:13,688 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50957 transitions. [2021-07-09 17:19:13,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:19:13,700 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:13,700 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:13,915 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 543 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-07-09 17:19:13,915 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:13,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:13,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1530702308, now seen corresponding path program 333 times [2021-07-09 17:19:13,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:13,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103049966] [2021-07-09 17:19:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:14,102 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 8 [2021-07-09 17:19:14,228 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:14,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:14,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103049966] [2021-07-09 17:19:14,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103049966] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:14,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348275510] [2021-07-09 17:19:14,228 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 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:14,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:19:14,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:14,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:19:14,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 61 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:14,345 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348275510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:14,345 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:14,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-07-09 17:19:14,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293235124] [2021-07-09 17:19:14,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:19:14,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:14,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:19:14,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:19:14,345 INFO L87 Difference]: Start difference. First operand 19930 states and 50957 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:14,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:14,625 INFO L93 Difference]: Finished difference Result 23966 states and 58492 transitions. [2021-07-09 17:19:14,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-07-09 17:19:14,625 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:14,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:14,665 INFO L225 Difference]: With dead ends: 23966 [2021-07-09 17:19:14,665 INFO L226 Difference]: Without dead ends: 23912 [2021-07-09 17:19:14,665 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 352.5ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:19:14,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23912 states. [2021-07-09 17:19:15,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23912 to 19930. [2021-07-09 17:19:15,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19930 states, 19929 states have (on average 2.5567765567765566) internal successors, (50954), 19929 states have internal predecessors, (50954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:15,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19930 states to 19930 states and 50954 transitions. [2021-07-09 17:19:15,072 INFO L78 Accepts]: Start accepts. Automaton has 19930 states and 50954 transitions. Word has length 59 [2021-07-09 17:19:15,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:15,072 INFO L482 AbstractCegarLoop]: Abstraction has 19930 states and 50954 transitions. [2021-07-09 17:19:15,072 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:15,072 INFO L276 IsEmpty]: Start isEmpty. Operand 19930 states and 50954 transitions. [2021-07-09 17:19:15,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:19:15,084 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:15,084 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:15,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1155 [2021-07-09 17:19:15,300 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:15,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:15,300 INFO L82 PathProgramCache]: Analyzing trace with hash -809267123, now seen corresponding path program 334 times [2021-07-09 17:19:15,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:15,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898511276] [2021-07-09 17:19:15,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:15,449 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 17 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:19:15,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:15,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898511276] [2021-07-09 17:19:15,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898511276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:15,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974231466] [2021-07-09 17:19:15,449 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 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:15,478 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:19:15,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:15,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjunts are in the unsatisfiable core [2021-07-09 17:19:15,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:15,679 INFO L173 IndexEqualityManager]: detected equality via solver [2021-07-09 17:19:15,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 14 [2021-07-09 17:19:15,681 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-09 17:19:15,682 INFO L628 ElimStorePlain]: treesize reduction 20, result has 4.8 percent of original size [2021-07-09 17:19:15,682 INFO L518 ElimStorePlain]: Eliminatee B vanished before elimination [2021-07-09 17:19:15,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-09 17:19:15,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:1 [2021-07-09 17:19:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 20 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:19:15,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974231466] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:15,689 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:15,689 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-07-09 17:19:15,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775639297] [2021-07-09 17:19:15,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-07-09 17:19:15,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:15,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-07-09 17:19:15,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=537, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:19:15,690 INFO L87 Difference]: Start difference. First operand 19930 states and 50954 transitions. Second operand has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:28,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:28,654 INFO L93 Difference]: Finished difference Result 96650 states and 218441 transitions. [2021-07-09 17:19:28,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 511 states. [2021-07-09 17:19:28,654 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:28,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:28,900 INFO L225 Difference]: With dead ends: 96650 [2021-07-09 17:19:28,901 INFO L226 Difference]: Without dead ends: 93908 [2021-07-09 17:19:28,912 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 509 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122443 ImplicationChecksByTransitivity, 10927.8ms TimeCoverageRelationStatistics Valid=13119, Invalid=247491, Unknown=0, NotChecked=0, Total=260610 [2021-07-09 17:19:29,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93908 states. [2021-07-09 17:19:30,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93908 to 23705. [2021-07-09 17:19:30,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23705 states, 23704 states have (on average 2.5331589605129934) internal successors, (60046), 23704 states have internal predecessors, (60046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:30,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60046 transitions. [2021-07-09 17:19:30,353 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60046 transitions. Word has length 59 [2021-07-09 17:19:30,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:30,353 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60046 transitions. [2021-07-09 17:19:30,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 3.08) internal successors, (77), 24 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:30,353 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60046 transitions. [2021-07-09 17:19:30,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:19:30,366 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:30,366 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:30,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1163 [2021-07-09 17:19:30,582 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:30,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:30,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1426088706, now seen corresponding path program 335 times [2021-07-09 17:19:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:30,583 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316417698] [2021-07-09 17:19:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:30,719 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:30,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:30,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316417698] [2021-07-09 17:19:30,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316417698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:30,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603728387] [2021-07-09 17:19:30,719 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 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:30,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-07-09 17:19:30,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:30,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:19:30,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:30,865 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 74 proven. 104 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:30,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603728387] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:30,865 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:30,865 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 20 [2021-07-09 17:19:30,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538753312] [2021-07-09 17:19:30,866 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:19:30,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:30,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:19:30,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:19:30,866 INFO L87 Difference]: Start difference. First operand 23705 states and 60046 transitions. Second operand has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:31,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:31,523 INFO L93 Difference]: Finished difference Result 29277 states and 70528 transitions. [2021-07-09 17:19:31,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:19:31,524 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:31,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:31,569 INFO L225 Difference]: With dead ends: 29277 [2021-07-09 17:19:31,570 INFO L226 Difference]: Without dead ends: 29214 [2021-07-09 17:19:31,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 220.7ms TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2021-07-09 17:19:31,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29214 states. [2021-07-09 17:19:32,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29214 to 23705. [2021-07-09 17:19:32,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23705 states, 23704 states have (on average 2.533032399595005) internal successors, (60043), 23704 states have internal predecessors, (60043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:32,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23705 states to 23705 states and 60043 transitions. [2021-07-09 17:19:32,147 INFO L78 Accepts]: Start accepts. Automaton has 23705 states and 60043 transitions. Word has length 59 [2021-07-09 17:19:32,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:32,147 INFO L482 AbstractCegarLoop]: Abstraction has 23705 states and 60043 transitions. [2021-07-09 17:19:32,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.380952380952381) internal successors, (71), 20 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:32,148 INFO L276 IsEmpty]: Start isEmpty. Operand 23705 states and 60043 transitions. [2021-07-09 17:19:32,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:19:32,161 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:32,161 INFO L508 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:32,377 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:32,377 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:32,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:32,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2030174377, now seen corresponding path program 336 times [2021-07-09 17:19:32,377 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:32,377 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232267308] [2021-07-09 17:19:32,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:32,545 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:32,545 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:32,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232267308] [2021-07-09 17:19:32,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232267308] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:32,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392184874] [2021-07-09 17:19:32,546 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 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:32,577 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:19:32,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:32,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 33 conjunts are in the unsatisfiable core [2021-07-09 17:19:32,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 16 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:32,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392184874] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:32,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:32,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17] total 18 [2021-07-09 17:19:32,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675440347] [2021-07-09 17:19:32,659 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:19:32,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:32,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:19:32,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:19:32,660 INFO L87 Difference]: Start difference. First operand 23705 states and 60043 transitions. Second operand has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:33,391 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2021-07-09 17:19:33,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:33,724 INFO L93 Difference]: Finished difference Result 33949 states and 78972 transitions. [2021-07-09 17:19:33,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-07-09 17:19:33,725 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:33,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:33,779 INFO L225 Difference]: With dead ends: 33949 [2021-07-09 17:19:33,780 INFO L226 Difference]: Without dead ends: 30265 [2021-07-09 17:19:33,780 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 57 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 634.2ms TimeCoverageRelationStatistics Valid=273, Invalid=1367, Unknown=0, NotChecked=0, Total=1640 [2021-07-09 17:19:33,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30265 states. [2021-07-09 17:19:34,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30265 to 13219. [2021-07-09 17:19:34,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13219 states, 13218 states have (on average 2.659479497654713) internal successors, (35153), 13218 states have internal predecessors, (35153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:34,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13219 states to 13219 states and 35153 transitions. [2021-07-09 17:19:34,219 INFO L78 Accepts]: Start accepts. Automaton has 13219 states and 35153 transitions. Word has length 59 [2021-07-09 17:19:34,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:34,220 INFO L482 AbstractCegarLoop]: Abstraction has 13219 states and 35153 transitions. [2021-07-09 17:19:34,220 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.210526315789474) internal successors, (61), 18 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:34,220 INFO L276 IsEmpty]: Start isEmpty. Operand 13219 states and 35153 transitions. [2021-07-09 17:19:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:19:34,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:34,229 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:34,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1173,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:34,445 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash 2026731402, now seen corresponding path program 161 times [2021-07-09 17:19:34,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:34,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376221735] [2021-07-09 17:19:34,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:34,520 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:34,520 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:34,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376221735] [2021-07-09 17:19:34,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376221735] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:34,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402598173] [2021-07-09 17:19:34,520 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 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:34,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:19:34,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:34,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:19:34,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:34,682 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:34,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402598173] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:34,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:34,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 17] total 20 [2021-07-09 17:19:34,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774216574] [2021-07-09 17:19:34,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:19:34,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:34,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:19:34,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=264, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:19:34,683 INFO L87 Difference]: Start difference. First operand 13219 states and 35153 transitions. Second operand has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:35,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:35,101 INFO L93 Difference]: Finished difference Result 15361 states and 39642 transitions. [2021-07-09 17:19:35,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:19:35,102 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:35,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:35,126 INFO L225 Difference]: With dead ends: 15361 [2021-07-09 17:19:35,126 INFO L226 Difference]: Without dead ends: 15347 [2021-07-09 17:19:35,126 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 129.3ms TimeCoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2021-07-09 17:19:35,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15347 states. [2021-07-09 17:19:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15347 to 13918. [2021-07-09 17:19:35,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13918 states, 13917 states have (on average 2.6583315369691745) internal successors, (36996), 13917 states have internal predecessors, (36996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:35,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13918 states to 13918 states and 36996 transitions. [2021-07-09 17:19:35,509 INFO L78 Accepts]: Start accepts. Automaton has 13918 states and 36996 transitions. Word has length 59 [2021-07-09 17:19:35,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:35,509 INFO L482 AbstractCegarLoop]: Abstraction has 13918 states and 36996 transitions. [2021-07-09 17:19:35,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 4.428571428571429) internal successors, (93), 20 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:35,509 INFO L276 IsEmpty]: Start isEmpty. Operand 13918 states and 36996 transitions. [2021-07-09 17:19:35,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:19:35,520 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:35,520 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:35,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:35,744 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:35,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:35,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1404850992, now seen corresponding path program 162 times [2021-07-09 17:19:35,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:35,744 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218345159] [2021-07-09 17:19:35,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:35,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:35,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:35,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218345159] [2021-07-09 17:19:35,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218345159] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:35,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902835693] [2021-07-09 17:19:35,825 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 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:35,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-07-09 17:19:35,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:35,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:19:35,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:35,941 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 114 proven. 64 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:35,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902835693] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:35,941 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:35,941 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 12 [2021-07-09 17:19:35,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834092426] [2021-07-09 17:19:35,941 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:19:35,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:35,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:19:35,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:19:35,941 INFO L87 Difference]: Start difference. First operand 13918 states and 36996 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:36,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:36,354 INFO L93 Difference]: Finished difference Result 16530 states and 42212 transitions. [2021-07-09 17:19:36,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-09 17:19:36,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:36,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:36,379 INFO L225 Difference]: With dead ends: 16530 [2021-07-09 17:19:36,380 INFO L226 Difference]: Without dead ends: 16530 [2021-07-09 17:19:36,380 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 220.2ms TimeCoverageRelationStatistics Valid=172, Invalid=248, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:19:36,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16530 states. [2021-07-09 17:19:36,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16530 to 13921. [2021-07-09 17:19:36,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13921 states, 13920 states have (on average 2.658405172413793) internal successors, (37005), 13920 states have internal predecessors, (37005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:36,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13921 states to 13921 states and 37005 transitions. [2021-07-09 17:19:36,609 INFO L78 Accepts]: Start accepts. Automaton has 13921 states and 37005 transitions. Word has length 59 [2021-07-09 17:19:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:36,610 INFO L482 AbstractCegarLoop]: Abstraction has 13921 states and 37005 transitions. [2021-07-09 17:19:36,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 13921 states and 37005 transitions. [2021-07-09 17:19:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:19:36,619 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:36,619 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:36,835 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1176,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:36,836 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:36,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:36,836 INFO L82 PathProgramCache]: Analyzing trace with hash -232721464, now seen corresponding path program 163 times [2021-07-09 17:19:36,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:36,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344095015] [2021-07-09 17:19:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:36,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:37,008 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 115 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:37,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:37,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344095015] [2021-07-09 17:19:37,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344095015] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:37,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581022712] [2021-07-09 17:19:37,008 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 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:37,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:37,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:19:37,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 116 proven. 62 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:19:37,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581022712] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:37,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:37,152 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 15 [2021-07-09 17:19:37,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561634744] [2021-07-09 17:19:37,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-09 17:19:37,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-09 17:19:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:19:37,152 INFO L87 Difference]: Start difference. First operand 13921 states and 37005 transitions. Second operand has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:37,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:37,725 INFO L93 Difference]: Finished difference Result 15683 states and 40328 transitions. [2021-07-09 17:19:37,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-09 17:19:37,725 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:37,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:37,751 INFO L225 Difference]: With dead ends: 15683 [2021-07-09 17:19:37,751 INFO L226 Difference]: Without dead ends: 15683 [2021-07-09 17:19:37,751 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 399.2ms TimeCoverageRelationStatistics Valid=412, Invalid=710, Unknown=0, NotChecked=0, Total=1122 [2021-07-09 17:19:37,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15683 states. [2021-07-09 17:19:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15683 to 13639. [2021-07-09 17:19:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13639 states, 13638 states have (on average 2.6627804663440386) internal successors, (36315), 13638 states have internal predecessors, (36315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:38,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13639 states to 13639 states and 36315 transitions. [2021-07-09 17:19:38,058 INFO L78 Accepts]: Start accepts. Automaton has 13639 states and 36315 transitions. Word has length 59 [2021-07-09 17:19:38,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:38,058 INFO L482 AbstractCegarLoop]: Abstraction has 13639 states and 36315 transitions. [2021-07-09 17:19:38,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.1875) internal successors, (67), 15 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:38,059 INFO L276 IsEmpty]: Start isEmpty. Operand 13639 states and 36315 transitions. [2021-07-09 17:19:38,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-07-09 17:19:38,069 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:38,069 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:38,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1177 [2021-07-09 17:19:38,285 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:38,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:38,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1702913116, now seen corresponding path program 337 times [2021-07-09 17:19:38,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:38,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477510626] [2021-07-09 17:19:38,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:38,438 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:38,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:38,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477510626] [2021-07-09 17:19:38,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477510626] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:38,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320432225] [2021-07-09 17:19:38,438 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 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:38,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:38,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-07-09 17:19:38,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:38,552 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 94 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:38,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320432225] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:38,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:38,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-07-09 17:19:38,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468990474] [2021-07-09 17:19:38,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-09 17:19:38,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:38,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-09 17:19:38,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-07-09 17:19:38,553 INFO L87 Difference]: Start difference. First operand 13639 states and 36315 transitions. Second operand has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:39,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:39,030 INFO L93 Difference]: Finished difference Result 15972 states and 40554 transitions. [2021-07-09 17:19:39,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:19:39,030 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-07-09 17:19:39,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:39,052 INFO L225 Difference]: With dead ends: 15972 [2021-07-09 17:19:39,052 INFO L226 Difference]: Without dead ends: 15898 [2021-07-09 17:19:39,052 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 223.0ms TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-07-09 17:19:39,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15898 states. [2021-07-09 17:19:39,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15898 to 13648. [2021-07-09 17:19:39,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13648 states, 13647 states have (on average 2.6620502674580493) internal successors, (36329), 13647 states have internal predecessors, (36329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:39,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13648 states to 13648 states and 36329 transitions. [2021-07-09 17:19:39,276 INFO L78 Accepts]: Start accepts. Automaton has 13648 states and 36329 transitions. Word has length 59 [2021-07-09 17:19:39,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:39,276 INFO L482 AbstractCegarLoop]: Abstraction has 13648 states and 36329 transitions. [2021-07-09 17:19:39,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.1052631578947367) internal successors, (59), 18 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:39,277 INFO L276 IsEmpty]: Start isEmpty. Operand 13648 states and 36329 transitions. [2021-07-09 17:19:39,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 17:19:39,287 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:39,287 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:39,503 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,551 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:39,503 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:39,504 INFO L82 PathProgramCache]: Analyzing trace with hash -911313595, now seen corresponding path program 338 times [2021-07-09 17:19:39,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:39,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345595214] [2021-07-09 17:19:39,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:39,574 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:19:39,575 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:39,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345595214] [2021-07-09 17:19:39,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345595214] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:39,575 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852975998] [2021-07-09 17:19:39,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:39,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:19:39,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:39,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:19:39,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 92 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:40,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852975998] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:40,090 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:40,090 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 19] total 28 [2021-07-09 17:19:40,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416031725] [2021-07-09 17:19:40,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:19:40,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:40,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:19:40,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:19:40,091 INFO L87 Difference]: Start difference. First operand 13648 states and 36329 transitions. Second operand has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:42,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:42,133 INFO L93 Difference]: Finished difference Result 17222 states and 43443 transitions. [2021-07-09 17:19:42,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-07-09 17:19:42,134 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-09 17:19:42,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:42,160 INFO L225 Difference]: With dead ends: 17222 [2021-07-09 17:19:42,160 INFO L226 Difference]: Without dead ends: 17184 [2021-07-09 17:19:42,160 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1211.8ms TimeCoverageRelationStatistics Valid=971, Invalid=4141, Unknown=0, NotChecked=0, Total=5112 [2021-07-09 17:19:42,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17184 states. [2021-07-09 17:19:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17184 to 14862. [2021-07-09 17:19:42,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14862 states, 14861 states have (on average 2.622905591817509) internal successors, (38979), 14861 states have internal predecessors, (38979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:42,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14862 states to 14862 states and 38979 transitions. [2021-07-09 17:19:42,461 INFO L78 Accepts]: Start accepts. Automaton has 14862 states and 38979 transitions. Word has length 62 [2021-07-09 17:19:42,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:42,461 INFO L482 AbstractCegarLoop]: Abstraction has 14862 states and 38979 transitions. [2021-07-09 17:19:42,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 4.241379310344827) internal successors, (123), 28 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:42,461 INFO L276 IsEmpty]: Start isEmpty. Operand 14862 states and 38979 transitions. [2021-07-09 17:19:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 17:19:42,473 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:42,473 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:42,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1190 [2021-07-09 17:19:42,689 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:42,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:42,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2125604839, now seen corresponding path program 339 times [2021-07-09 17:19:42,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:42,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210865736] [2021-07-09 17:19:42,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:42,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:42,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210865736] [2021-07-09 17:19:42,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210865736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:42,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [721964092] [2021-07-09 17:19:42,760 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 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:42,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 17:19:42,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:42,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:19:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:42,874 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:42,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [721964092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:42,874 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:42,874 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:19:42,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092199060] [2021-07-09 17:19:42,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:19:42,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:42,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:19:42,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:19:42,875 INFO L87 Difference]: Start difference. First operand 14862 states and 38979 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:43,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:43,298 INFO L93 Difference]: Finished difference Result 16116 states and 41321 transitions. [2021-07-09 17:19:43,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:19:43,298 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-09 17:19:43,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:43,322 INFO L225 Difference]: With dead ends: 16116 [2021-07-09 17:19:43,323 INFO L226 Difference]: Without dead ends: 16081 [2021-07-09 17:19:43,323 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.6ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:19:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16081 states. [2021-07-09 17:19:43,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16081 to 14880. [2021-07-09 17:19:43,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14880 states, 14879 states have (on average 2.62228644398145) internal successors, (39017), 14879 states have internal predecessors, (39017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14880 states to 14880 states and 39017 transitions. [2021-07-09 17:19:43,682 INFO L78 Accepts]: Start accepts. Automaton has 14880 states and 39017 transitions. Word has length 62 [2021-07-09 17:19:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:43,682 INFO L482 AbstractCegarLoop]: Abstraction has 14880 states and 39017 transitions. [2021-07-09 17:19:43,682 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:43,682 INFO L276 IsEmpty]: Start isEmpty. Operand 14880 states and 39017 transitions. [2021-07-09 17:19:43,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 17:19:43,694 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:43,694 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:43,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1191,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:43,910 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:43,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:43,911 INFO L82 PathProgramCache]: Analyzing trace with hash -845583229, now seen corresponding path program 340 times [2021-07-09 17:19:43,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:43,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482824063] [2021-07-09 17:19:43,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:43,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:43,982 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:43,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:43,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482824063] [2021-07-09 17:19:43,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482824063] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:43,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459105374] [2021-07-09 17:19:43,982 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:44,012 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:19:44,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:44,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:19:44,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:44,086 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:44,086 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459105374] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:44,086 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:44,086 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:19:44,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178726463] [2021-07-09 17:19:44,086 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:19:44,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:44,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:19:44,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:19:44,087 INFO L87 Difference]: Start difference. First operand 14880 states and 39017 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:44,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:44,505 INFO L93 Difference]: Finished difference Result 16292 states and 41632 transitions. [2021-07-09 17:19:44,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:19:44,506 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-09 17:19:44,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:44,533 INFO L225 Difference]: With dead ends: 16292 [2021-07-09 17:19:44,533 INFO L226 Difference]: Without dead ends: 16254 [2021-07-09 17:19:44,533 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.9ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:19:44,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16254 states. [2021-07-09 17:19:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16254 to 14979. [2021-07-09 17:19:44,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14979 states, 14978 states have (on average 2.617038322873548) internal successors, (39198), 14978 states have internal predecessors, (39198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:44,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14979 states to 14979 states and 39198 transitions. [2021-07-09 17:19:44,874 INFO L78 Accepts]: Start accepts. Automaton has 14979 states and 39198 transitions. Word has length 62 [2021-07-09 17:19:44,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:44,874 INFO L482 AbstractCegarLoop]: Abstraction has 14979 states and 39198 transitions. [2021-07-09 17:19:44,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:44,874 INFO L276 IsEmpty]: Start isEmpty. Operand 14979 states and 39198 transitions. [2021-07-09 17:19:44,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 17:19:44,885 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:44,885 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:45,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:45,102 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:45,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:45,102 INFO L82 PathProgramCache]: Analyzing trace with hash -528313753, now seen corresponding path program 341 times [2021-07-09 17:19:45,102 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:45,102 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902991673] [2021-07-09 17:19:45,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:45,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:45,173 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:45,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902991673] [2021-07-09 17:19:45,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902991673] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:45,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238112388] [2021-07-09 17:19:45,174 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 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:45,209 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-07-09 17:19:45,209 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:45,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:19:45,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:45,283 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:45,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238112388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:45,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:45,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:19:45,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599359171] [2021-07-09 17:19:45,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:19:45,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:45,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:19:45,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:19:45,284 INFO L87 Difference]: Start difference. First operand 14979 states and 39198 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:45,700 INFO L93 Difference]: Finished difference Result 16320 states and 41716 transitions. [2021-07-09 17:19:45,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:19:45,701 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-09 17:19:45,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:45,847 INFO L225 Difference]: With dead ends: 16320 [2021-07-09 17:19:45,847 INFO L226 Difference]: Without dead ends: 16260 [2021-07-09 17:19:45,847 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.1ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:19:45,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16260 states. [2021-07-09 17:19:46,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16260 to 15051. [2021-07-09 17:19:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15051 states, 15050 states have (on average 2.613421926910299) internal successors, (39332), 15050 states have internal predecessors, (39332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:46,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15051 states to 15051 states and 39332 transitions. [2021-07-09 17:19:46,093 INFO L78 Accepts]: Start accepts. Automaton has 15051 states and 39332 transitions. Word has length 62 [2021-07-09 17:19:46,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:46,093 INFO L482 AbstractCegarLoop]: Abstraction has 15051 states and 39332 transitions. [2021-07-09 17:19:46,093 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:46,093 INFO L276 IsEmpty]: Start isEmpty. Operand 15051 states and 39332 transitions. [2021-07-09 17:19:46,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 17:19:46,105 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:46,105 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:46,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1193,555 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:46,321 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:46,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:46,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1976372733, now seen corresponding path program 342 times [2021-07-09 17:19:46,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:46,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768465555] [2021-07-09 17:19:46,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:46,393 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:46,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:46,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768465555] [2021-07-09 17:19:46,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768465555] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:46,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719262762] [2021-07-09 17:19:46,393 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 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:46,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-07-09 17:19:46,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:46,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:19:46,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:46,641 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 44 proven. 155 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:19:46,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719262762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:46,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:46,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 17:19:46,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541008211] [2021-07-09 17:19:46,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:19:46,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:46,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:19:46,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:19:46,642 INFO L87 Difference]: Start difference. First operand 15051 states and 39332 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:47,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:47,947 INFO L93 Difference]: Finished difference Result 22065 states and 52580 transitions. [2021-07-09 17:19:47,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:19:47,947 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-09 17:19:47,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:47,984 INFO L225 Difference]: With dead ends: 22065 [2021-07-09 17:19:47,984 INFO L226 Difference]: Without dead ends: 21976 [2021-07-09 17:19:47,984 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 526.1ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:19:48,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21976 states. [2021-07-09 17:19:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21976 to 15162. [2021-07-09 17:19:48,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15162 states, 15161 states have (on average 2.608403139634589) internal successors, (39546), 15161 states have internal predecessors, (39546), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:48,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15162 states to 15162 states and 39546 transitions. [2021-07-09 17:19:48,360 INFO L78 Accepts]: Start accepts. Automaton has 15162 states and 39546 transitions. Word has length 62 [2021-07-09 17:19:48,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:48,360 INFO L482 AbstractCegarLoop]: Abstraction has 15162 states and 39546 transitions. [2021-07-09 17:19:48,360 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:48,360 INFO L276 IsEmpty]: Start isEmpty. Operand 15162 states and 39546 transitions. [2021-07-09 17:19:48,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 17:19:48,373 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:48,373 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:48,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,556 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:48,589 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:48,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:48,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1845042407, now seen corresponding path program 343 times [2021-07-09 17:19:48,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:48,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145018105] [2021-07-09 17:19:48,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:48,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:48,661 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:48,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145018105] [2021-07-09 17:19:48,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145018105] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:48,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1652789182] [2021-07-09 17:19:48,661 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 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:48,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:48,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:19:48,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:48,764 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:48,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1652789182] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:48,764 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:48,764 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:19:48,764 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35594987] [2021-07-09 17:19:48,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:19:48,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:48,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:19:48,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:19:48,765 INFO L87 Difference]: Start difference. First operand 15162 states and 39546 transitions. Second operand has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:49,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:49,187 INFO L93 Difference]: Finished difference Result 16450 states and 42034 transitions. [2021-07-09 17:19:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:19:49,187 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-09 17:19:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:49,213 INFO L225 Difference]: With dead ends: 16450 [2021-07-09 17:19:49,213 INFO L226 Difference]: Without dead ends: 16412 [2021-07-09 17:19:49,213 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:19:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16412 states. [2021-07-09 17:19:49,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16412 to 15288. [2021-07-09 17:19:49,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15288 states, 15287 states have (on average 2.6023418590959637) internal successors, (39782), 15287 states have internal predecessors, (39782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:49,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15288 states to 15288 states and 39782 transitions. [2021-07-09 17:19:49,509 INFO L78 Accepts]: Start accepts. Automaton has 15288 states and 39782 transitions. Word has length 62 [2021-07-09 17:19:49,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:49,509 INFO L482 AbstractCegarLoop]: Abstraction has 15288 states and 39782 transitions. [2021-07-09 17:19:49,509 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.454545454545454) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:49,509 INFO L276 IsEmpty]: Start isEmpty. Operand 15288 states and 39782 transitions. [2021-07-09 17:19:49,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 17:19:49,524 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:49,524 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:49,741 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1195,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:49,741 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:49,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:49,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1074636925, now seen corresponding path program 344 times [2021-07-09 17:19:49,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:49,741 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720795273] [2021-07-09 17:19:49,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:49,814 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:49,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720795273] [2021-07-09 17:19:49,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720795273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:49,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65720953] [2021-07-09 17:19:49,814 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 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:49,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:19:49,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:49,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:19:49,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 48 proven. 151 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:19:50,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65720953] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:50,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:50,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 17:19:50,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920161016] [2021-07-09 17:19:50,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:19:50,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:50,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:19:50,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:19:50,051 INFO L87 Difference]: Start difference. First operand 15288 states and 39782 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:51,466 INFO L93 Difference]: Finished difference Result 22675 states and 53617 transitions. [2021-07-09 17:19:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:19:51,467 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-09 17:19:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:51,500 INFO L225 Difference]: With dead ends: 22675 [2021-07-09 17:19:51,500 INFO L226 Difference]: Without dead ends: 22612 [2021-07-09 17:19:51,501 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 551.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:19:51,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22612 states. [2021-07-09 17:19:51,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22612 to 15453. [2021-07-09 17:19:51,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15453 states, 15452 states have (on average 2.595392182241781) internal successors, (40104), 15452 states have internal predecessors, (40104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15453 states to 15453 states and 40104 transitions. [2021-07-09 17:19:51,793 INFO L78 Accepts]: Start accepts. Automaton has 15453 states and 40104 transitions. Word has length 62 [2021-07-09 17:19:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:51,793 INFO L482 AbstractCegarLoop]: Abstraction has 15453 states and 40104 transitions. [2021-07-09 17:19:51,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 15453 states and 40104 transitions. [2021-07-09 17:19:51,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 17:19:51,807 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:51,807 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:52,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:52,024 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:52,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:52,024 INFO L82 PathProgramCache]: Analyzing trace with hash 436062055, now seen corresponding path program 345 times [2021-07-09 17:19:52,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:52,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041839893] [2021-07-09 17:19:52,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:52,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 194 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-07-09 17:19:52,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:52,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041839893] [2021-07-09 17:19:52,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041839893] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:52,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222430439] [2021-07-09 17:19:52,104 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 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:52,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2021-07-09 17:19:52,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:52,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 21 conjunts are in the unsatisfiable core [2021-07-09 17:19:52,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 59 proven. 140 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:19:52,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222430439] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:52,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:52,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 20 [2021-07-09 17:19:52,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994770260] [2021-07-09 17:19:52,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-07-09 17:19:52,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:52,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-07-09 17:19:52,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=345, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:19:52,501 INFO L87 Difference]: Start difference. First operand 15453 states and 40104 transitions. Second operand has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:53,861 INFO L93 Difference]: Finished difference Result 23187 states and 55034 transitions. [2021-07-09 17:19:53,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-07-09 17:19:53,861 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-07-09 17:19:53,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:53,899 INFO L225 Difference]: With dead ends: 23187 [2021-07-09 17:19:53,900 INFO L226 Difference]: Without dead ends: 23122 [2021-07-09 17:19:53,900 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 588.9ms TimeCoverageRelationStatistics Valid=390, Invalid=1866, Unknown=0, NotChecked=0, Total=2256 [2021-07-09 17:19:53,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23122 states. [2021-07-09 17:19:54,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23122 to 16198. [2021-07-09 17:19:54,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16198 states, 16197 states have (on average 2.5986911156386987) internal successors, (42091), 16197 states have internal predecessors, (42091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:54,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16198 states to 16198 states and 42091 transitions. [2021-07-09 17:19:54,290 INFO L78 Accepts]: Start accepts. Automaton has 16198 states and 42091 transitions. Word has length 62 [2021-07-09 17:19:54,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:54,290 INFO L482 AbstractCegarLoop]: Abstraction has 16198 states and 42091 transitions. [2021-07-09 17:19:54,290 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 5.714285714285714) internal successors, (120), 20 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:54,290 INFO L276 IsEmpty]: Start isEmpty. Operand 16198 states and 42091 transitions. [2021-07-09 17:19:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-07-09 17:19:54,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:54,303 INFO L508 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:54,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1197,559 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:54,519 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:54,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:54,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1292919549, now seen corresponding path program 346 times [2021-07-09 17:19:54,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:54,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888258663] [2021-07-09 17:19:54,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:54,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:54,590 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:19:54,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:54,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888258663] [2021-07-09 17:19:54,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888258663] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:54,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119082913] [2021-07-09 17:19:54,590 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 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:54,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:19:54,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:54,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 35 conjunts are in the unsatisfiable core [2021-07-09 17:19:54,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:19:54,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119082913] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:54,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:54,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-07-09 17:19:54,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239966315] [2021-07-09 17:19:54,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-09 17:19:54,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:54,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-09 17:19:54,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:19:54,698 INFO L87 Difference]: Start difference. First operand 16198 states and 42091 transitions. Second operand has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 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) [2021-07-09 17:19:55,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:19:55,113 INFO L93 Difference]: Finished difference Result 18245 states and 46468 transitions. [2021-07-09 17:19:55,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-09 17:19:55,113 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 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 62 [2021-07-09 17:19:55,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:19:55,143 INFO L225 Difference]: With dead ends: 18245 [2021-07-09 17:19:55,143 INFO L226 Difference]: Without dead ends: 18220 [2021-07-09 17:19:55,144 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2021-07-09 17:19:55,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18220 states. [2021-07-09 17:19:55,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18220 to 16907. [2021-07-09 17:19:55,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16907 states, 16906 states have (on average 2.594522654678812) internal successors, (43863), 16906 states have internal predecessors, (43863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:19:55,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16907 states to 16907 states and 43863 transitions. [2021-07-09 17:19:55,484 INFO L78 Accepts]: Start accepts. Automaton has 16907 states and 43863 transitions. Word has length 62 [2021-07-09 17:19:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:19:55,484 INFO L482 AbstractCegarLoop]: Abstraction has 16907 states and 43863 transitions. [2021-07-09 17:19:55,484 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.545454545454546) internal successors, (61), 10 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) [2021-07-09 17:19:55,484 INFO L276 IsEmpty]: Start isEmpty. Operand 16907 states and 43863 transitions. [2021-07-09 17:19:55,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:19:55,498 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:19:55,498 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:19:55,714 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1198 [2021-07-09 17:19:55,714 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:19:55,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:19:55,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1959224392, now seen corresponding path program 164 times [2021-07-09 17:19:55,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:19:55,714 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432657984] [2021-07-09 17:19:55,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:19:55,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:19:55,918 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 217 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:55,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:19:55,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432657984] [2021-07-09 17:19:55,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432657984] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:55,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638106695] [2021-07-09 17:19:55,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:19:55,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:19:55,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:19:55,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 25 conjunts are in the unsatisfiable core [2021-07-09 17:19:55,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:19:57,104 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 93 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:19:57,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [638106695] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:19:57,104 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:19:57,104 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-07-09 17:19:57,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131720751] [2021-07-09 17:19:57,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-07-09 17:19:57,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:19:57,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-07-09 17:19:57,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1563, Unknown=0, NotChecked=0, Total=1722 [2021-07-09 17:19:57,105 INFO L87 Difference]: Start difference. First operand 16907 states and 43863 transitions. Second operand has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:05,420 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2021-07-09 17:20:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:21,870 INFO L93 Difference]: Finished difference Result 40647 states and 93712 transitions. [2021-07-09 17:20:21,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 408 states. [2021-07-09 17:20:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:21,950 INFO L225 Difference]: With dead ends: 40647 [2021-07-09 17:20:21,950 INFO L226 Difference]: Without dead ends: 39783 [2021-07-09 17:20:21,959 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 477 GetRequests, 41 SyntacticMatches, 3 SemanticMatches, 433 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80537 ImplicationChecksByTransitivity, 21917.9ms TimeCoverageRelationStatistics Valid=22109, Invalid=166681, Unknown=0, NotChecked=0, Total=188790 [2021-07-09 17:20:21,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39783 states. [2021-07-09 17:20:22,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39783 to 20292. [2021-07-09 17:20:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20292 states, 20291 states have (on average 2.6370311960967916) internal successors, (53508), 20291 states have internal predecessors, (53508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20292 states to 20292 states and 53508 transitions. [2021-07-09 17:20:22,602 INFO L78 Accepts]: Start accepts. Automaton has 20292 states and 53508 transitions. Word has length 65 [2021-07-09 17:20:22,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:22,602 INFO L482 AbstractCegarLoop]: Abstraction has 20292 states and 53508 transitions. [2021-07-09 17:20:22,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 41 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:22,602 INFO L276 IsEmpty]: Start isEmpty. Operand 20292 states and 53508 transitions. [2021-07-09 17:20:22,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:22,620 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:22,620 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:22,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 561 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1199 [2021-07-09 17:20:22,837 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:22,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:22,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1290275768, now seen corresponding path program 347 times [2021-07-09 17:20:22,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:22,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744527000] [2021-07-09 17:20:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:22,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:23,070 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 207 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:23,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:23,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744527000] [2021-07-09 17:20:23,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744527000] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:23,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539005772] [2021-07-09 17:20:23,070 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:23,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-07-09 17:20:23,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:23,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 17:20:23,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:23,521 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:23,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539005772] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:23,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:23,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-07-09 17:20:23,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388827558] [2021-07-09 17:20:23,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-07-09 17:20:23,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:23,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-07-09 17:20:23,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:20:23,522 INFO L87 Difference]: Start difference. First operand 20292 states and 53508 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 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) [2021-07-09 17:20:25,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:25,134 INFO L93 Difference]: Finished difference Result 20618 states and 54021 transitions. [2021-07-09 17:20:25,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:20:25,135 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 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 65 [2021-07-09 17:20:25,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:25,176 INFO L225 Difference]: With dead ends: 20618 [2021-07-09 17:20:25,176 INFO L226 Difference]: Without dead ends: 20502 [2021-07-09 17:20:25,176 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 465.5ms TimeCoverageRelationStatistics Valid=73, Invalid=739, Unknown=0, NotChecked=0, Total=812 [2021-07-09 17:20:25,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20502 states. [2021-07-09 17:20:25,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20502 to 20276. [2021-07-09 17:20:25,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20276 states, 20275 states have (on average 2.635906288532676) internal successors, (53443), 20275 states have internal predecessors, (53443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:25,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20276 states to 20276 states and 53443 transitions. [2021-07-09 17:20:25,768 INFO L78 Accepts]: Start accepts. Automaton has 20276 states and 53443 transitions. Word has length 65 [2021-07-09 17:20:25,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:25,768 INFO L482 AbstractCegarLoop]: Abstraction has 20276 states and 53443 transitions. [2021-07-09 17:20:25,768 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 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) [2021-07-09 17:20:25,768 INFO L276 IsEmpty]: Start isEmpty. Operand 20276 states and 53443 transitions. [2021-07-09 17:20:25,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:25,787 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:25,787 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:26,003 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-07-09 17:20:26,003 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:26,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:26,003 INFO L82 PathProgramCache]: Analyzing trace with hash 708589307, now seen corresponding path program 165 times [2021-07-09 17:20:26,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:26,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72693373] [2021-07-09 17:20:26,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:26,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:26,106 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:26,106 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:26,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72693373] [2021-07-09 17:20:26,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72693373] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:26,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507006147] [2021-07-09 17:20:26,106 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 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:26,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-07-09 17:20:26,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:26,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:26,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:26,239 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:26,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507006147] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:26,240 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:26,240 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:20:26,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57527911] [2021-07-09 17:20:26,240 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:20:26,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:26,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:20:26,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:20:26,240 INFO L87 Difference]: Start difference. First operand 20276 states and 53443 transitions. Second operand has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:26,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:26,642 INFO L93 Difference]: Finished difference Result 27245 states and 66968 transitions. [2021-07-09 17:20:26,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:20:26,643 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:26,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:26,687 INFO L225 Difference]: With dead ends: 27245 [2021-07-09 17:20:26,687 INFO L226 Difference]: Without dead ends: 27235 [2021-07-09 17:20:26,687 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 108.6ms TimeCoverageRelationStatistics Valid=91, Invalid=149, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:20:26,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27235 states. [2021-07-09 17:20:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27235 to 20359. [2021-07-09 17:20:27,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20359 states, 20358 states have (on average 2.638324000392966) internal successors, (53711), 20358 states have internal predecessors, (53711), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:27,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20359 states to 20359 states and 53711 transitions. [2021-07-09 17:20:27,255 INFO L78 Accepts]: Start accepts. Automaton has 20359 states and 53711 transitions. Word has length 65 [2021-07-09 17:20:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:27,255 INFO L482 AbstractCegarLoop]: Abstraction has 20359 states and 53711 transitions. [2021-07-09 17:20:27,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.0) internal successors, (70), 13 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 20359 states and 53711 transitions. [2021-07-09 17:20:27,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:27,272 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:27,273 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:27,489 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 563 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1213 [2021-07-09 17:20:27,489 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:27,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:27,489 INFO L82 PathProgramCache]: Analyzing trace with hash -248603333, now seen corresponding path program 166 times [2021-07-09 17:20:27,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:27,490 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222371280] [2021-07-09 17:20:27,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:27,569 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 128 proven. 99 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:27,570 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:27,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222371280] [2021-07-09 17:20:27,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222371280] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:27,570 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414820522] [2021-07-09 17:20:27,570 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 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:27,600 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:20:27,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:27,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:27,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:27,700 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 99 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:27,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414820522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:27,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:27,700 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:20:27,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556873101] [2021-07-09 17:20:27,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:20:27,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:27,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:20:27,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:20:27,701 INFO L87 Difference]: Start difference. First operand 20359 states and 53711 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:27,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:27,990 INFO L93 Difference]: Finished difference Result 30078 states and 74504 transitions. [2021-07-09 17:20:27,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:20:27,990 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:27,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:28,056 INFO L225 Difference]: With dead ends: 30078 [2021-07-09 17:20:28,056 INFO L226 Difference]: Without dead ends: 30078 [2021-07-09 17:20:28,056 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 85.3ms TimeCoverageRelationStatistics Valid=86, Invalid=124, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:20:28,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30078 states. [2021-07-09 17:20:28,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30078 to 22013. [2021-07-09 17:20:28,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22013 states, 22012 states have (on average 2.6694075958568053) internal successors, (58759), 22012 states have internal predecessors, (58759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:28,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22013 states to 22013 states and 58759 transitions. [2021-07-09 17:20:28,580 INFO L78 Accepts]: Start accepts. Automaton has 22013 states and 58759 transitions. Word has length 65 [2021-07-09 17:20:28,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:28,580 INFO L482 AbstractCegarLoop]: Abstraction has 22013 states and 58759 transitions. [2021-07-09 17:20:28,580 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:28,580 INFO L276 IsEmpty]: Start isEmpty. Operand 22013 states and 58759 transitions. [2021-07-09 17:20:28,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:28,602 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:28,602 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:28,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 564 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1216 [2021-07-09 17:20:28,809 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:28,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:28,809 INFO L82 PathProgramCache]: Analyzing trace with hash -782468709, now seen corresponding path program 348 times [2021-07-09 17:20:28,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:28,809 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126455285] [2021-07-09 17:20:28,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:28,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:28,890 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:28,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:28,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126455285] [2021-07-09 17:20:28,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126455285] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:28,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250586333] [2021-07-09 17:20:28,891 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 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:28,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:20:28,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:28,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:28,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:29,081 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 116 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:29,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250586333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:29,081 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:29,081 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:20:29,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403889468] [2021-07-09 17:20:29,081 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:20:29,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:29,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:20:29,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:20:29,082 INFO L87 Difference]: Start difference. First operand 22013 states and 58759 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:29,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:29,301 INFO L93 Difference]: Finished difference Result 23642 states and 61469 transitions. [2021-07-09 17:20:29,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:20:29,301 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:29,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:29,344 INFO L225 Difference]: With dead ends: 23642 [2021-07-09 17:20:29,344 INFO L226 Difference]: Without dead ends: 23636 [2021-07-09 17:20:29,344 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 75.0ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:20:29,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23636 states. [2021-07-09 17:20:29,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23636 to 21888. [2021-07-09 17:20:29,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21888 states, 21887 states have (on average 2.666971261479417) internal successors, (58372), 21887 states have internal predecessors, (58372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:29,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21888 states to 21888 states and 58372 transitions. [2021-07-09 17:20:29,812 INFO L78 Accepts]: Start accepts. Automaton has 21888 states and 58372 transitions. Word has length 65 [2021-07-09 17:20:29,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:29,813 INFO L482 AbstractCegarLoop]: Abstraction has 21888 states and 58372 transitions. [2021-07-09 17:20:29,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:29,813 INFO L276 IsEmpty]: Start isEmpty. Operand 21888 states and 58372 transitions. [2021-07-09 17:20:29,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:29,832 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:29,832 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:30,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1217,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:30,049 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:30,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:30,049 INFO L82 PathProgramCache]: Analyzing trace with hash 855335590, now seen corresponding path program 167 times [2021-07-09 17:20:30,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:30,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474159891] [2021-07-09 17:20:30,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:30,156 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:20:30,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:30,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474159891] [2021-07-09 17:20:30,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474159891] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:30,157 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518734170] [2021-07-09 17:20:30,157 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 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:30,193 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-07-09 17:20:30,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:30,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 17:20:30,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:20:30,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518734170] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:30,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:30,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:20:30,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403186166] [2021-07-09 17:20:30,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:20:30,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:30,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:20:30,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:20:30,289 INFO L87 Difference]: Start difference. First operand 21888 states and 58372 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:31,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:31,049 INFO L93 Difference]: Finished difference Result 24640 states and 63599 transitions. [2021-07-09 17:20:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:20:31,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:31,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:31,100 INFO L225 Difference]: With dead ends: 24640 [2021-07-09 17:20:31,101 INFO L226 Difference]: Without dead ends: 24581 [2021-07-09 17:20:31,101 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 176.5ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:20:31,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-07-09 17:20:31,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 22019. [2021-07-09 17:20:31,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22019 states, 22018 states have (on average 2.66618221455173) internal successors, (58704), 22018 states have internal predecessors, (58704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:31,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22019 states to 22019 states and 58704 transitions. [2021-07-09 17:20:31,529 INFO L78 Accepts]: Start accepts. Automaton has 22019 states and 58704 transitions. Word has length 65 [2021-07-09 17:20:31,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:31,529 INFO L482 AbstractCegarLoop]: Abstraction has 22019 states and 58704 transitions. [2021-07-09 17:20:31,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:31,529 INFO L276 IsEmpty]: Start isEmpty. Operand 22019 states and 58704 transitions. [2021-07-09 17:20:31,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:31,550 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:31,550 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:31,766 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-07-09 17:20:31,767 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:31,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:31,767 INFO L82 PathProgramCache]: Analyzing trace with hash -698361267, now seen corresponding path program 349 times [2021-07-09 17:20:31,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:31,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404477375] [2021-07-09 17:20:31,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:31,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:31,919 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:20:31,919 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:31,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404477375] [2021-07-09 17:20:31,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404477375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:31,919 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411757798] [2021-07-09 17:20:31,919 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 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:31,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:31,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:32,041 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 105 proven. 118 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:20:32,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411757798] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:32,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:32,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:20:32,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767141714] [2021-07-09 17:20:32,041 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:20:32,041 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:32,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:20:32,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:20:32,042 INFO L87 Difference]: Start difference. First operand 22019 states and 58704 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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) [2021-07-09 17:20:32,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:32,287 INFO L93 Difference]: Finished difference Result 25003 states and 63786 transitions. [2021-07-09 17:20:32,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:20:32,287 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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 65 [2021-07-09 17:20:32,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:32,337 INFO L225 Difference]: With dead ends: 25003 [2021-07-09 17:20:32,337 INFO L226 Difference]: Without dead ends: 25000 [2021-07-09 17:20:32,337 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 63.5ms TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:20:32,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25000 states. [2021-07-09 17:20:32,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25000 to 21981. [2021-07-09 17:20:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21981 states, 21980 states have (on average 2.664649681528662) internal successors, (58569), 21980 states have internal predecessors, (58569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:32,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21981 states to 21981 states and 58569 transitions. [2021-07-09 17:20:32,805 INFO L78 Accepts]: Start accepts. Automaton has 21981 states and 58569 transitions. Word has length 65 [2021-07-09 17:20:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:32,805 INFO L482 AbstractCegarLoop]: Abstraction has 21981 states and 58569 transitions. [2021-07-09 17:20:32,805 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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) [2021-07-09 17:20:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 21981 states and 58569 transitions. [2021-07-09 17:20:32,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:32,826 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:32,826 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:33,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 567 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1221 [2021-07-09 17:20:33,047 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:33,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:33,047 INFO L82 PathProgramCache]: Analyzing trace with hash -491298701, now seen corresponding path program 350 times [2021-07-09 17:20:33,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:33,047 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660775948] [2021-07-09 17:20:33,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:33,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:33,141 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:20:33,142 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:33,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660775948] [2021-07-09 17:20:33,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660775948] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:33,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [19896852] [2021-07-09 17:20:33,142 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 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:33,175 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:20:33,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:33,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:33,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:33,263 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 102 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:20:33,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [19896852] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:33,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:33,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:20:33,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425314652] [2021-07-09 17:20:33,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:20:33,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:33,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:20:33,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:20:33,265 INFO L87 Difference]: Start difference. First operand 21981 states and 58569 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:33,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:33,632 INFO L93 Difference]: Finished difference Result 24995 states and 63690 transitions. [2021-07-09 17:20:33,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:20:33,633 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:33,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:33,687 INFO L225 Difference]: With dead ends: 24995 [2021-07-09 17:20:33,688 INFO L226 Difference]: Without dead ends: 24977 [2021-07-09 17:20:33,688 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:20:33,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24977 states. [2021-07-09 17:20:34,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24977 to 21595. [2021-07-09 17:20:34,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21595 states, 21594 states have (on average 2.658840418634806) internal successors, (57415), 21594 states have internal predecessors, (57415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:34,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21595 states to 21595 states and 57415 transitions. [2021-07-09 17:20:34,208 INFO L78 Accepts]: Start accepts. Automaton has 21595 states and 57415 transitions. Word has length 65 [2021-07-09 17:20:34,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:34,208 INFO L482 AbstractCegarLoop]: Abstraction has 21595 states and 57415 transitions. [2021-07-09 17:20:34,208 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:34,208 INFO L276 IsEmpty]: Start isEmpty. Operand 21595 states and 57415 transitions. [2021-07-09 17:20:34,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:34,229 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:34,229 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:34,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 568 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1223 [2021-07-09 17:20:34,433 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:34,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:34,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1939298714, now seen corresponding path program 351 times [2021-07-09 17:20:34,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:34,434 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649412736] [2021-07-09 17:20:34,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:34,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:34,540 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:20:34,540 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:34,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649412736] [2021-07-09 17:20:34,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649412736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:34,540 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148203018] [2021-07-09 17:20:34,540 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 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:34,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-07-09 17:20:34,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:34,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 17:20:34,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:34,679 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:20:34,679 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148203018] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:34,679 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:34,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:20:34,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462759497] [2021-07-09 17:20:34,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:20:34,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:34,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:20:34,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:20:34,680 INFO L87 Difference]: Start difference. First operand 21595 states and 57415 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:35,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:35,824 INFO L93 Difference]: Finished difference Result 23174 states and 60158 transitions. [2021-07-09 17:20:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:20:35,824 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:35,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:35,863 INFO L225 Difference]: With dead ends: 23174 [2021-07-09 17:20:35,863 INFO L226 Difference]: Without dead ends: 23136 [2021-07-09 17:20:35,864 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 180.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:20:35,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23136 states. [2021-07-09 17:20:36,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23136 to 21566. [2021-07-09 17:20:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21566 states, 21565 states have (on average 2.658567122652446) internal successors, (57332), 21565 states have internal predecessors, (57332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:36,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21566 states to 21566 states and 57332 transitions. [2021-07-09 17:20:36,376 INFO L78 Accepts]: Start accepts. Automaton has 21566 states and 57332 transitions. Word has length 65 [2021-07-09 17:20:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:36,376 INFO L482 AbstractCegarLoop]: Abstraction has 21566 states and 57332 transitions. [2021-07-09 17:20:36,376 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 21566 states and 57332 transitions. [2021-07-09 17:20:36,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:36,397 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:36,397 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:36,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-07-09 17:20:36,614 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:36,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:36,614 INFO L82 PathProgramCache]: Analyzing trace with hash 1742132402, now seen corresponding path program 352 times [2021-07-09 17:20:36,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:36,614 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656475424] [2021-07-09 17:20:36,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:36,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:36,721 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 19 proven. 202 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:20:36,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:36,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656475424] [2021-07-09 17:20:36,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656475424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:36,722 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365746541] [2021-07-09 17:20:36,722 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 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:36,751 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-09 17:20:36,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:36,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 17:20:36,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:36,859 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 203 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:20:36,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365746541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:36,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:36,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:20:36,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242675551] [2021-07-09 17:20:36,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:20:36,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:36,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:20:36,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:20:36,860 INFO L87 Difference]: Start difference. First operand 21566 states and 57332 transitions. Second operand has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:37,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:37,967 INFO L93 Difference]: Finished difference Result 23637 states and 61214 transitions. [2021-07-09 17:20:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:20:37,968 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:38,028 INFO L225 Difference]: With dead ends: 23637 [2021-07-09 17:20:38,028 INFO L226 Difference]: Without dead ends: 23625 [2021-07-09 17:20:38,028 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 192.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:20:38,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23625 states. [2021-07-09 17:20:38,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23625 to 21570. [2021-07-09 17:20:38,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21570 states, 21569 states have (on average 2.6583059019889657) internal successors, (57337), 21569 states have internal predecessors, (57337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:38,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21570 states to 21570 states and 57337 transitions. [2021-07-09 17:20:38,625 INFO L78 Accepts]: Start accepts. Automaton has 21570 states and 57337 transitions. Word has length 65 [2021-07-09 17:20:38,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:38,625 INFO L482 AbstractCegarLoop]: Abstraction has 21570 states and 57337 transitions. [2021-07-09 17:20:38,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.923076923076923) internal successors, (64), 12 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:38,625 INFO L276 IsEmpty]: Start isEmpty. Operand 21570 states and 57337 transitions. [2021-07-09 17:20:38,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:38,645 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:38,645 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:38,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1227,570 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:38,859 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:38,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:38,860 INFO L82 PathProgramCache]: Analyzing trace with hash 1584832915, now seen corresponding path program 168 times [2021-07-09 17:20:38,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:38,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079289333] [2021-07-09 17:20:38,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:38,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 111 proven. 115 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:20:39,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:39,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079289333] [2021-07-09 17:20:39,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079289333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:39,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306891108] [2021-07-09 17:20:39,009 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 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:39,086 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-07-09 17:20:39,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:39,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:39,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:39,248 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 113 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:39,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306891108] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:39,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:39,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 16 [2021-07-09 17:20:39,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941802447] [2021-07-09 17:20:39,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-07-09 17:20:39,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:39,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-07-09 17:20:39,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:20:39,249 INFO L87 Difference]: Start difference. First operand 21570 states and 57337 transitions. Second operand has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 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) [2021-07-09 17:20:39,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:39,582 INFO L93 Difference]: Finished difference Result 28789 states and 71294 transitions. [2021-07-09 17:20:39,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-09 17:20:39,583 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 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 65 [2021-07-09 17:20:39,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:39,638 INFO L225 Difference]: With dead ends: 28789 [2021-07-09 17:20:39,638 INFO L226 Difference]: Without dead ends: 28769 [2021-07-09 17:20:39,638 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 167.8ms TimeCoverageRelationStatistics Valid=139, Invalid=241, Unknown=0, NotChecked=0, Total=380 [2021-07-09 17:20:39,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28769 states. [2021-07-09 17:20:40,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28769 to 21641. [2021-07-09 17:20:40,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21641 states, 21640 states have (on average 2.6605822550831792) internal successors, (57575), 21640 states have internal predecessors, (57575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:40,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21641 states to 21641 states and 57575 transitions. [2021-07-09 17:20:40,195 INFO L78 Accepts]: Start accepts. Automaton has 21641 states and 57575 transitions. Word has length 65 [2021-07-09 17:20:40,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:40,195 INFO L482 AbstractCegarLoop]: Abstraction has 21641 states and 57575 transitions. [2021-07-09 17:20:40,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.588235294117647) internal successors, (78), 16 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) [2021-07-09 17:20:40,195 INFO L276 IsEmpty]: Start isEmpty. Operand 21641 states and 57575 transitions. [2021-07-09 17:20:40,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:40,217 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:40,217 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:40,433 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1228 [2021-07-09 17:20:40,433 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:40,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:40,433 INFO L82 PathProgramCache]: Analyzing trace with hash -410917560, now seen corresponding path program 353 times [2021-07-09 17:20:40,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:40,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529896932] [2021-07-09 17:20:40,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:40,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:40,539 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:40,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:40,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529896932] [2021-07-09 17:20:40,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529896932] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:40,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23064566] [2021-07-09 17:20:40,539 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 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:40,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-07-09 17:20:40,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:40,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 17:20:40,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:40,746 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 18 proven. 207 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:40,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [23064566] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:40,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:40,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-07-09 17:20:40,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684257680] [2021-07-09 17:20:40,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:20:40,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:20:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:20:40,746 INFO L87 Difference]: Start difference. First operand 21641 states and 57575 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) [2021-07-09 17:20:41,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:41,607 INFO L93 Difference]: Finished difference Result 24593 states and 63329 transitions. [2021-07-09 17:20:41,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-07-09 17:20:41,607 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 65 [2021-07-09 17:20:41,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:41,657 INFO L225 Difference]: With dead ends: 24593 [2021-07-09 17:20:41,657 INFO L226 Difference]: Without dead ends: 24581 [2021-07-09 17:20:41,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 213.7ms TimeCoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-07-09 17:20:41,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24581 states. [2021-07-09 17:20:42,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24581 to 21673. [2021-07-09 17:20:42,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21673 states, 21672 states have (on average 2.6601605758582503) internal successors, (57651), 21672 states have internal predecessors, (57651), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:42,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21673 states to 21673 states and 57651 transitions. [2021-07-09 17:20:42,169 INFO L78 Accepts]: Start accepts. Automaton has 21673 states and 57651 transitions. Word has length 65 [2021-07-09 17:20:42,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:42,169 INFO L482 AbstractCegarLoop]: Abstraction has 21673 states and 57651 transitions. [2021-07-09 17:20:42,169 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) [2021-07-09 17:20:42,169 INFO L276 IsEmpty]: Start isEmpty. Operand 21673 states and 57651 transitions. [2021-07-09 17:20:42,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:42,190 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:42,190 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:42,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1231 [2021-07-09 17:20:42,406 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:42,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:42,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1270859487, now seen corresponding path program 169 times [2021-07-09 17:20:42,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:42,406 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209916388] [2021-07-09 17:20:42,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 135 proven. 91 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-09 17:20:42,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:42,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209916388] [2021-07-09 17:20:42,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209916388] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:42,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729331546] [2021-07-09 17:20:42,485 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 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:42,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:42,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:42,618 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 136 proven. 91 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:42,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729331546] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:42,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:42,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 13 [2021-07-09 17:20:42,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424532341] [2021-07-09 17:20:42,618 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:20:42,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:42,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:20:42,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=109, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:20:42,619 INFO L87 Difference]: Start difference. First operand 21673 states and 57651 transitions. Second operand has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:43,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:43,027 INFO L93 Difference]: Finished difference Result 31661 states and 78137 transitions. [2021-07-09 17:20:43,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:20:43,028 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:43,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:43,094 INFO L225 Difference]: With dead ends: 31661 [2021-07-09 17:20:43,094 INFO L226 Difference]: Without dead ends: 31661 [2021-07-09 17:20:43,094 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 71 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 88.1ms TimeCoverageRelationStatistics Valid=101, Invalid=139, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:20:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31661 states. [2021-07-09 17:20:43,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31661 to 21919. [2021-07-09 17:20:43,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21919 states, 21918 states have (on average 2.6655260516470483) internal successors, (58423), 21918 states have internal predecessors, (58423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:43,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21919 states to 21919 states and 58423 transitions. [2021-07-09 17:20:43,754 INFO L78 Accepts]: Start accepts. Automaton has 21919 states and 58423 transitions. Word has length 65 [2021-07-09 17:20:43,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:43,754 INFO L482 AbstractCegarLoop]: Abstraction has 21919 states and 58423 transitions. [2021-07-09 17:20:43,754 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.928571428571429) internal successors, (69), 13 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:43,754 INFO L276 IsEmpty]: Start isEmpty. Operand 21919 states and 58423 transitions. [2021-07-09 17:20:43,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:43,773 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:43,773 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:43,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1232,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:43,989 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:43,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:43,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1386535353, now seen corresponding path program 170 times [2021-07-09 17:20:43,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:43,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513792489] [2021-07-09 17:20:43,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:44,076 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 129 proven. 98 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:44,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513792489] [2021-07-09 17:20:44,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513792489] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:44,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458850997] [2021-07-09 17:20:44,076 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 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:44,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:20:44,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:44,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:44,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 130 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-09 17:20:44,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1458850997] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:44,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:44,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 14 [2021-07-09 17:20:44,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628223926] [2021-07-09 17:20:44,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-09 17:20:44,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:44,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-09 17:20:44,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=134, Unknown=0, NotChecked=0, Total=210 [2021-07-09 17:20:44,205 INFO L87 Difference]: Start difference. First operand 21919 states and 58423 transitions. Second operand has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:44,512 INFO L93 Difference]: Finished difference Result 29555 states and 73447 transitions. [2021-07-09 17:20:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-09 17:20:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:44,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:44,715 INFO L225 Difference]: With dead ends: 29555 [2021-07-09 17:20:44,715 INFO L226 Difference]: Without dead ends: 29555 [2021-07-09 17:20:44,715 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 104.7ms TimeCoverageRelationStatistics Valid=121, Invalid=185, Unknown=0, NotChecked=0, Total=306 [2021-07-09 17:20:44,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29555 states. [2021-07-09 17:20:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29555 to 21626. [2021-07-09 17:20:45,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21626 states, 21625 states have (on average 2.6610404624277457) internal successors, (57545), 21625 states have internal predecessors, (57545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57545 transitions. [2021-07-09 17:20:45,215 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57545 transitions. Word has length 65 [2021-07-09 17:20:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:45,215 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57545 transitions. [2021-07-09 17:20:45,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.6) internal successors, (69), 14 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57545 transitions. [2021-07-09 17:20:45,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:45,233 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:45,233 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:45,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 574 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1233 [2021-07-09 17:20:45,449 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:45,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:45,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1121641549, now seen corresponding path program 354 times [2021-07-09 17:20:45,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:45,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023030471] [2021-07-09 17:20:45,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:45,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:45,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:45,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023030471] [2021-07-09 17:20:45,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023030471] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:45,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597882616] [2021-07-09 17:20:45,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:45,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-07-09 17:20:45,573 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:45,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:45,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:45,662 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 104 proven. 123 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-09 17:20:45,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1597882616] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:45,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:45,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-07-09 17:20:45,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189773157] [2021-07-09 17:20:45,662 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-09 17:20:45,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:45,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-09 17:20:45,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-07-09 17:20:45,663 INFO L87 Difference]: Start difference. First operand 21626 states and 57545 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 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) [2021-07-09 17:20:45,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:45,930 INFO L93 Difference]: Finished difference Result 24366 states and 62196 transitions. [2021-07-09 17:20:45,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:20:45,931 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 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 65 [2021-07-09 17:20:45,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:45,977 INFO L225 Difference]: With dead ends: 24366 [2021-07-09 17:20:45,977 INFO L226 Difference]: Without dead ends: 24348 [2021-07-09 17:20:45,978 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2021-07-09 17:20:46,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24348 states. [2021-07-09 17:20:46,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24348 to 21626. [2021-07-09 17:20:46,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21626 states, 21625 states have (on average 2.660578034682081) internal successors, (57535), 21625 states have internal predecessors, (57535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:46,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21626 states to 21626 states and 57535 transitions. [2021-07-09 17:20:46,640 INFO L78 Accepts]: Start accepts. Automaton has 21626 states and 57535 transitions. Word has length 65 [2021-07-09 17:20:46,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:46,641 INFO L482 AbstractCegarLoop]: Abstraction has 21626 states and 57535 transitions. [2021-07-09 17:20:46,641 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 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) [2021-07-09 17:20:46,641 INFO L276 IsEmpty]: Start isEmpty. Operand 21626 states and 57535 transitions. [2021-07-09 17:20:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:46,659 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:46,659 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:46,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1234,575 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:46,873 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:46,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:46,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1172605066, now seen corresponding path program 171 times [2021-07-09 17:20:46,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:46,873 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528550701] [2021-07-09 17:20:46,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:46,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:46,975 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 10 proven. 213 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:20:46,975 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:46,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528550701] [2021-07-09 17:20:46,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528550701] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:46,976 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10589971] [2021-07-09 17:20:46,976 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 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:47,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 17:20:47,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 17:20:47,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:47,105 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 9 proven. 214 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:20:47,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10589971] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:47,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:47,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-07-09 17:20:47,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542677670] [2021-07-09 17:20:47,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:20:47,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:47,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:20:47,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:20:47,106 INFO L87 Difference]: Start difference. First operand 21626 states and 57535 transitions. Second operand has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:48,005 INFO L93 Difference]: Finished difference Result 24595 states and 63247 transitions. [2021-07-09 17:20:48,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:20:48,006 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:48,050 INFO L225 Difference]: With dead ends: 24595 [2021-07-09 17:20:48,050 INFO L226 Difference]: Without dead ends: 24545 [2021-07-09 17:20:48,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:20:48,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24545 states. [2021-07-09 17:20:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24545 to 21849. [2021-07-09 17:20:48,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21849 states, 21848 states have (on average 2.659602709630172) internal successors, (58107), 21848 states have internal predecessors, (58107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21849 states to 21849 states and 58107 transitions. [2021-07-09 17:20:48,517 INFO L78 Accepts]: Start accepts. Automaton has 21849 states and 58107 transitions. Word has length 65 [2021-07-09 17:20:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:48,517 INFO L482 AbstractCegarLoop]: Abstraction has 21849 states and 58107 transitions. [2021-07-09 17:20:48,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.0) internal successors, (65), 12 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 21849 states and 58107 transitions. [2021-07-09 17:20:48,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:48,537 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:48,537 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:48,753 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1238 [2021-07-09 17:20:48,753 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:48,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:48,753 INFO L82 PathProgramCache]: Analyzing trace with hash -381091791, now seen corresponding path program 355 times [2021-07-09 17:20:48,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:48,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208760541] [2021-07-09 17:20:48,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:48,826 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:20:48,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208760541] [2021-07-09 17:20:48,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208760541] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:48,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628048109] [2021-07-09 17:20:48,826 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:48,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:48,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:48,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 89 proven. 134 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:20:48,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628048109] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:48,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:48,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-07-09 17:20:48,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284944513] [2021-07-09 17:20:48,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-09 17:20:48,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:48,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-09 17:20:48,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-07-09 17:20:48,944 INFO L87 Difference]: Start difference. First operand 21849 states and 58107 transitions. Second operand has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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) [2021-07-09 17:20:49,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:49,198 INFO L93 Difference]: Finished difference Result 25610 states and 64561 transitions. [2021-07-09 17:20:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-09 17:20:49,199 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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 65 [2021-07-09 17:20:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:49,249 INFO L225 Difference]: With dead ends: 25610 [2021-07-09 17:20:49,249 INFO L226 Difference]: Without dead ends: 25607 [2021-07-09 17:20:49,250 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 60.3ms TimeCoverageRelationStatistics Valid=64, Invalid=92, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:20:49,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25607 states. [2021-07-09 17:20:49,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25607 to 21817. [2021-07-09 17:20:49,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21817 states, 21816 states have (on average 2.657957462412908) internal successors, (57986), 21816 states have internal predecessors, (57986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:49,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57986 transitions. [2021-07-09 17:20:49,775 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57986 transitions. Word has length 65 [2021-07-09 17:20:49,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:49,775 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57986 transitions. [2021-07-09 17:20:49,775 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.083333333333333) internal successors, (61), 11 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) [2021-07-09 17:20:49,775 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57986 transitions. [2021-07-09 17:20:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:49,795 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:49,795 INFO L508 BasicCegarLoop]: trace histogram [10, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:50,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,577 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:50,011 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:50,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:50,011 INFO L82 PathProgramCache]: Analyzing trace with hash -174029225, now seen corresponding path program 356 times [2021-07-09 17:20:50,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:50,011 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092252644] [2021-07-09 17:20:50,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:50,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:50,083 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:20:50,084 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:50,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092252644] [2021-07-09 17:20:50,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092252644] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:50,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755016383] [2021-07-09 17:20:50,084 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 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:50,113 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-09 17:20:50,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:50,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2021-07-09 17:20:50,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 85 proven. 138 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-09 17:20:50,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755016383] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:50,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:50,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-07-09 17:20:50,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260599898] [2021-07-09 17:20:50,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:20:50,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:50,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:20:50,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=96, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:20:50,201 INFO L87 Difference]: Start difference. First operand 21817 states and 57986 transitions. Second operand has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:50,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:50,625 INFO L93 Difference]: Finished difference Result 25614 states and 64489 transitions. [2021-07-09 17:20:50,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-09 17:20:50,625 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:50,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:50,675 INFO L225 Difference]: With dead ends: 25614 [2021-07-09 17:20:50,675 INFO L226 Difference]: Without dead ends: 25596 [2021-07-09 17:20:50,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-07-09 17:20:50,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25596 states. [2021-07-09 17:20:51,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25596 to 21817. [2021-07-09 17:20:51,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21817 states, 21816 states have (on average 2.6563989732306563) internal successors, (57952), 21816 states have internal predecessors, (57952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:51,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21817 states to 21817 states and 57952 transitions. [2021-07-09 17:20:51,237 INFO L78 Accepts]: Start accepts. Automaton has 21817 states and 57952 transitions. Word has length 65 [2021-07-09 17:20:51,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-09 17:20:51,237 INFO L482 AbstractCegarLoop]: Abstraction has 21817 states and 57952 transitions. [2021-07-09 17:20:51,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.769230769230769) internal successors, (62), 12 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:51,238 INFO L276 IsEmpty]: Start isEmpty. Operand 21817 states and 57952 transitions. [2021-07-09 17:20:51,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-07-09 17:20:51,258 INFO L500 BasicCegarLoop]: Found error trace [2021-07-09 17:20:51,258 INFO L508 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-09 17:20:51,475 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,578 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:51,475 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-09 17:20:51,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-09 17:20:51,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1622029238, now seen corresponding path program 357 times [2021-07-09 17:20:51,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-09 17:20:51,476 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613384838] [2021-07-09 17:20:51,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-09 17:20:51,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-09 17:20:51,570 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 22 proven. 201 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:20:51,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-09 17:20:51,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613384838] [2021-07-09 17:20:51,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613384838] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:51,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070038093] [2021-07-09 17:20:51,571 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 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-09 17:20:51,603 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-07-09 17:20:51,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-09 17:20:51,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 37 conjunts are in the unsatisfiable core [2021-07-09 17:20:51,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-09 17:20:51,704 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 17 proven. 206 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-09 17:20:51,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070038093] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-09 17:20:51,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-09 17:20:51,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-07-09 17:20:51,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371803513] [2021-07-09 17:20:51,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-09 17:20:51,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-09 17:20:51,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-09 17:20:51,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-07-09 17:20:51,705 INFO L87 Difference]: Start difference. First operand 21817 states and 57952 transitions. Second operand has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-09 17:20:52,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-09 17:20:52,586 INFO L93 Difference]: Finished difference Result 23463 states and 60807 transitions. [2021-07-09 17:20:52,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-07-09 17:20:52,586 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.3076923076923075) internal successors, (69), 12 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2021-07-09 17:20:52,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-09 17:20:52,728 INFO L225 Difference]: With dead ends: 23463 [2021-07-09 17:20:52,728 INFO L226 Difference]: Without dead ends: 23407 [2021-07-09 17:20:52,728 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 168.9ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-07-09 17:20:52,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23407 states.