/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-2-context-qQ7.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 19:42:14,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 19:42:14,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 19:42:14,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 19:42:15,007 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 [2021-02-19 19:42:15,033 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 19:42:15,033 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 19:42:15,034 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 19:42:15,034 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 19:42:15,036 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 19:42:15,036 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 19:42:15,036 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 19:42:15,037 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 19:42:15,037 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 19:42:15,037 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 19:42:15,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 19:42:15,038 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 19:42:15,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 19:42:15,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 19:42:15,038 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 19:42:15,038 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 19:42:15,038 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 19:42:15,038 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 19:42:15,038 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 19:42:15,039 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 19:42:15,039 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 19:42:15,039 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 19:42:15,039 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 19:42:15,039 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 19:42:15,039 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 19:42:15,039 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 19:42:15,039 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 19:42:15,039 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 19:42:15,040 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 19:42:15,040 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 19:42:15,040 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 19:42:15,040 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 19:42:15,323 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 19:42:15,347 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 19:42:15,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 19:42:15,350 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 19:42:15,351 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 19:42:15,352 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-2-context-qQ7.wvr.bpl [2021-02-19 19:42:15,353 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-proofs/counter-add-2-context-qQ7.wvr.bpl' [2021-02-19 19:42:15,391 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 19:42:15,397 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 19:42:15,398 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 19:42:15,399 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 19:42:15,399 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 19:42:15,409 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (1/1) ... [2021-02-19 19:42:15,417 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (1/1) ... [2021-02-19 19:42:15,424 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 19:42:15,425 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 19:42:15,425 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 19:42:15,426 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 19:42:15,432 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (1/1) ... [2021-02-19 19:42:15,432 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (1/1) ... [2021-02-19 19:42:15,433 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (1/1) ... [2021-02-19 19:42:15,433 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (1/1) ... [2021-02-19 19:42:15,436 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (1/1) ... [2021-02-19 19:42:15,439 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (1/1) ... [2021-02-19 19:42:15,439 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (1/1) ... [2021-02-19 19:42:15,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 19:42:15,442 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 19:42:15,442 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 19:42:15,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 19:42:15,444 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (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 [2021-02-19 19:42:15,513 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 19:42:15,513 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 19:42:15,514 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 19:42:15,514 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 19:42:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 19:42:15,514 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 19:42:15,514 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 19:42:15,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 19:42:15,514 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 19:42:15,515 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 19:42:15,704 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 19:42:15,704 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 19:42:15,706 INFO L202 PluginConnector]: Adding new model counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:42:15 BoogieIcfgContainer [2021-02-19 19:42:15,706 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 19:42:15,707 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 19:42:15,707 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 19:42:15,710 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 19:42:15,710 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 07:42:15" (1/2) ... [2021-02-19 19:42:15,710 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5041ca and model type counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 07:42:15, skipping insertion in model container [2021-02-19 19:42:15,711 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 07:42:15" (2/2) ... [2021-02-19 19:42:15,712 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-add-2-context-qQ7.wvr.bpl [2021-02-19 19:42:15,720 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 19:42:15,720 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 19:42:15,724 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 19:42:15,724 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 19:42:15,779 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 19:42:15,792 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 19:42:15,806 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 19:42:15,806 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 19:42:15,806 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 19:42:15,806 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 19:42:15,806 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 19:42:15,806 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 19:42:15,806 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 19:42:15,806 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 19:42:15,813 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 28 places, 23 transitions, 62 flow [2021-02-19 19:42:15,821 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:15,823 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:15,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 19:42:15,840 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:15,841 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:15,841 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:15,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:15,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1374225361, now seen corresponding path program 1 times [2021-02-19 19:42:15,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:15,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379319942] [2021-02-19 19:42:15,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:15,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:15,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379319942] [2021-02-19 19:42:15,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:42:15,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:42:15,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995455722] [2021-02-19 19:42:15,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-02-19 19:42:15,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:15,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-02-19 19:42:15,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-02-19 19:42:15,996 INFO L87 Difference]: Start difference. First operand has 35 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 34 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:16,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:16,057 INFO L93 Difference]: Finished difference Result 43 states and 77 transitions. [2021-02-19 19:42:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:42:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 19:42:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:16,065 INFO L225 Difference]: With dead ends: 43 [2021-02-19 19:42:16,065 INFO L226 Difference]: Without dead ends: 43 [2021-02-19 19:42:16,067 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:42:16,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-02-19 19:42:16,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2021-02-19 19:42:16,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.8108108108108107) internal successors, (67), 37 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:16,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 67 transitions. [2021-02-19 19:42:16,093 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 67 transitions. Word has length 15 [2021-02-19 19:42:16,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:16,093 INFO L480 AbstractCegarLoop]: Abstraction has 38 states and 67 transitions. [2021-02-19 19:42:16,093 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:16,094 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 67 transitions. [2021-02-19 19:42:16,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-02-19 19:42:16,094 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:16,094 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:16,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 19:42:16,095 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:16,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1296701101, now seen corresponding path program 1 times [2021-02-19 19:42:16,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:16,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699442096] [2021-02-19 19:42:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:16,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:42:16,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699442096] [2021-02-19 19:42:16,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 19:42:16,156 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 19:42:16,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749544600] [2021-02-19 19:42:16,158 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:42:16,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:16,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:42:16,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:42:16,159 INFO L87 Difference]: Start difference. First operand 38 states and 67 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:16,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:16,198 INFO L93 Difference]: Finished difference Result 50 states and 91 transitions. [2021-02-19 19:42:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:42:16,199 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 [2021-02-19 19:42:16,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:16,202 INFO L225 Difference]: With dead ends: 50 [2021-02-19 19:42:16,202 INFO L226 Difference]: Without dead ends: 50 [2021-02-19 19:42:16,202 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:42:16,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-02-19 19:42:16,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 44. [2021-02-19 19:42:16,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.8372093023255813) internal successors, (79), 43 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:16,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 79 transitions. [2021-02-19 19:42:16,209 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 79 transitions. Word has length 17 [2021-02-19 19:42:16,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:16,209 INFO L480 AbstractCegarLoop]: Abstraction has 44 states and 79 transitions. [2021-02-19 19:42:16,209 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:16,209 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 79 transitions. [2021-02-19 19:42:16,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:42:16,210 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:16,210 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:16,210 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-02-19 19:42:16,210 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash 193855083, now seen corresponding path program 1 times [2021-02-19 19:42:16,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:16,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978713827] [2021-02-19 19:42:16,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:16,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:16,317 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:16,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978713827] [2021-02-19 19:42:16,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2130968434] [2021-02-19 19:42:16,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:16,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:16,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 7 conjunts are in the unsatisfiable core [2021-02-19 19:42:16,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:16,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:16,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-02-19 19:42:16,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787242347] [2021-02-19 19:42:16,458 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 19:42:16,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:16,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 19:42:16,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:42:16,459 INFO L87 Difference]: Start difference. First operand 44 states and 79 transitions. Second operand has 5 states, 5 states have (on average 5.2) 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) [2021-02-19 19:42:16,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:16,491 INFO L93 Difference]: Finished difference Result 99 states and 185 transitions. [2021-02-19 19:42:16,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 19:42:16,493 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) 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 19 [2021-02-19 19:42:16,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:16,494 INFO L225 Difference]: With dead ends: 99 [2021-02-19 19:42:16,494 INFO L226 Difference]: Without dead ends: 78 [2021-02-19 19:42:16,494 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-02-19 19:42:16,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-02-19 19:42:16,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 59. [2021-02-19 19:42:16,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:16,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-02-19 19:42:16,503 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 19 [2021-02-19 19:42:16,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:16,503 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-02-19 19:42:16,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) 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) [2021-02-19 19:42:16,503 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-02-19 19:42:16,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 19:42:16,504 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:16,504 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:16,705 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-02-19 19:42:16,705 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:16,706 INFO L82 PathProgramCache]: Analyzing trace with hash 345587261, now seen corresponding path program 2 times [2021-02-19 19:42:16,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:16,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217092094] [2021-02-19 19:42:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:16,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217092094] [2021-02-19 19:42:16,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512730614] [2021-02-19 19:42:16,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:42:16,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:16,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:16,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 39 conjuncts, 5 conjunts are in the unsatisfiable core [2021-02-19 19:42:16,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:16,949 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:16,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:16,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-02-19 19:42:16,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76672140] [2021-02-19 19:42:16,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:42:16,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:16,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:42:16,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:42:16,951 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-02-19 19:42:16,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:16,984 INFO L93 Difference]: Finished difference Result 80 states and 151 transitions. [2021-02-19 19:42:16,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:42:16,985 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 19:42:16,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:16,987 INFO L225 Difference]: With dead ends: 80 [2021-02-19 19:42:16,987 INFO L226 Difference]: Without dead ends: 77 [2021-02-19 19:42:16,987 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:42:16,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-02-19 19:42:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2021-02-19 19:42:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.9333333333333333) internal successors, (116), 60 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:17,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 116 transitions. [2021-02-19 19:42:17,001 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 116 transitions. Word has length 19 [2021-02-19 19:42:17,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:17,002 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 116 transitions. [2021-02-19 19:42:17,002 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 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) [2021-02-19 19:42:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 116 transitions. [2021-02-19 19:42:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:42:17,003 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:17,003 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:17,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:17,218 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:17,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:17,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1215753897, now seen corresponding path program 3 times [2021-02-19 19:42:17,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:17,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319311431] [2021-02-19 19:42:17,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:17,300 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:17,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319311431] [2021-02-19 19:42:17,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159698182] [2021-02-19 19:42:17,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:42:17,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 19:42:17,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:17,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 19:42:17,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:17,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:17,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-02-19 19:42:17,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647971623] [2021-02-19 19:42:17,555 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:42:17,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:17,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:42:17,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:42:17,557 INFO L87 Difference]: Start difference. First operand 61 states and 116 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-02-19 19:42:17,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:17,984 INFO L93 Difference]: Finished difference Result 198 states and 365 transitions. [2021-02-19 19:42:17,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-02-19 19:42:17,986 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 19:42:17,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:17,988 INFO L225 Difference]: With dead ends: 198 [2021-02-19 19:42:17,988 INFO L226 Difference]: Without dead ends: 192 [2021-02-19 19:42:17,990 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=503, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:17,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-02-19 19:42:17,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 90. [2021-02-19 19:42:17,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.033707865168539) internal successors, (181), 89 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:18,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 181 transitions. [2021-02-19 19:42:18,000 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 181 transitions. Word has length 21 [2021-02-19 19:42:18,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:18,000 INFO L480 AbstractCegarLoop]: Abstraction has 90 states and 181 transitions. [2021-02-19 19:42:18,000 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 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) [2021-02-19 19:42:18,000 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 181 transitions. [2021-02-19 19:42:18,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-02-19 19:42:18,001 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:18,001 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:18,222 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:18,222 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:18,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:18,223 INFO L82 PathProgramCache]: Analyzing trace with hash 1465566235, now seen corresponding path program 4 times [2021-02-19 19:42:18,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:18,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607506732] [2021-02-19 19:42:18,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:18,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:18,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607506732] [2021-02-19 19:42:18,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200706580] [2021-02-19 19:42:18,293 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:42:18,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:42:18,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:18,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 9 conjunts are in the unsatisfiable core [2021-02-19 19:42:18,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:18,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:18,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:18,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2021-02-19 19:42:18,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315355651] [2021-02-19 19:42:18,453 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:42:18,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:18,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:42:18,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:42:18,455 INFO L87 Difference]: Start difference. First operand 90 states and 181 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-02-19 19:42:18,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:18,745 INFO L93 Difference]: Finished difference Result 170 states and 325 transitions. [2021-02-19 19:42:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:42:18,745 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-02-19 19:42:18,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:18,746 INFO L225 Difference]: With dead ends: 170 [2021-02-19 19:42:18,746 INFO L226 Difference]: Without dead ends: 166 [2021-02-19 19:42:18,747 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=186, Invalid=464, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:42:18,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-02-19 19:42:18,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 92. [2021-02-19 19:42:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:18,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 183 transitions. [2021-02-19 19:42:18,755 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 183 transitions. Word has length 21 [2021-02-19 19:42:18,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:18,755 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 183 transitions. [2021-02-19 19:42:18,756 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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) [2021-02-19 19:42:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 183 transitions. [2021-02-19 19:42:18,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:42:18,757 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:18,757 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:18,970 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:18,970 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:18,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:18,970 INFO L82 PathProgramCache]: Analyzing trace with hash -814263641, now seen corresponding path program 5 times [2021-02-19 19:42:18,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:18,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [574394097] [2021-02-19 19:42:18,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:18,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:19,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [574394097] [2021-02-19 19:42:19,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38747793] [2021-02-19 19:42:19,074 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:42:19,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 19:42:19,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:19,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 11 conjunts are in the unsatisfiable core [2021-02-19 19:42:19,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:19,172 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:19,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:19,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 19:42:19,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051237486] [2021-02-19 19:42:19,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 19:42:19,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:19,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 19:42:19,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:42:19,173 INFO L87 Difference]: Start difference. First operand 92 states and 183 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2021-02-19 19:42:19,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:19,196 INFO L93 Difference]: Finished difference Result 190 states and 376 transitions. [2021-02-19 19:42:19,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 19:42:19,196 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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 23 [2021-02-19 19:42:19,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:19,197 INFO L225 Difference]: With dead ends: 190 [2021-02-19 19:42:19,197 INFO L226 Difference]: Without dead ends: 163 [2021-02-19 19:42:19,198 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-02-19 19:42:19,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2021-02-19 19:42:19,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2021-02-19 19:42:19,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.0840336134453783) internal successors, (248), 119 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:19,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 248 transitions. [2021-02-19 19:42:19,205 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 248 transitions. Word has length 23 [2021-02-19 19:42:19,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:19,205 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 248 transitions. [2021-02-19 19:42:19,205 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 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) [2021-02-19 19:42:19,206 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 248 transitions. [2021-02-19 19:42:19,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:42:19,207 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:19,207 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:19,428 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:19,429 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:19,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:19,429 INFO L82 PathProgramCache]: Analyzing trace with hash 2085616889, now seen corresponding path program 6 times [2021-02-19 19:42:19,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:19,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422946674] [2021-02-19 19:42:19,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:19,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:19,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422946674] [2021-02-19 19:42:19,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015148170] [2021-02-19 19:42:19,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:19,568 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 19:42:19,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:19,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 19:42:19,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:19,764 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:19,764 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-02-19 19:42:19,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150075886] [2021-02-19 19:42:19,766 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-02-19 19:42:19,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:19,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-02-19 19:42:19,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:42:19,769 INFO L87 Difference]: Start difference. First operand 120 states and 248 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:20,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:20,267 INFO L93 Difference]: Finished difference Result 320 states and 619 transitions. [2021-02-19 19:42:20,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 19:42:20,268 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:42:20,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:20,269 INFO L225 Difference]: With dead ends: 320 [2021-02-19 19:42:20,269 INFO L226 Difference]: Without dead ends: 302 [2021-02-19 19:42:20,270 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=246, Invalid=876, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:42:20,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2021-02-19 19:42:20,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 141. [2021-02-19 19:42:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 2.092857142857143) internal successors, (293), 140 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 293 transitions. [2021-02-19 19:42:20,283 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 293 transitions. Word has length 23 [2021-02-19 19:42:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:20,283 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 293 transitions. [2021-02-19 19:42:20,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 293 transitions. [2021-02-19 19:42:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-02-19 19:42:20,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:20,284 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:20,484 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:20,485 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:20,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:20,485 INFO L82 PathProgramCache]: Analyzing trace with hash 2016607911, now seen corresponding path program 7 times [2021-02-19 19:42:20,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:20,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765187566] [2021-02-19 19:42:20,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:20,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:20,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765187566] [2021-02-19 19:42:20,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001222663] [2021-02-19 19:42:20,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:42:20,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:20,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 12 conjunts are in the unsatisfiable core [2021-02-19 19:42:20,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:20,730 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:20,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:20,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-02-19 19:42:20,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331085514] [2021-02-19 19:42:20,731 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:42:20,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:20,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:42:20,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:42:20,732 INFO L87 Difference]: Start difference. First operand 141 states and 293 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:21,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:21,066 INFO L93 Difference]: Finished difference Result 321 states and 651 transitions. [2021-02-19 19:42:21,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-02-19 19:42:21,067 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-02-19 19:42:21,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:21,069 INFO L225 Difference]: With dead ends: 321 [2021-02-19 19:42:21,070 INFO L226 Difference]: Without dead ends: 317 [2021-02-19 19:42:21,070 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:42:21,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-02-19 19:42:21,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 173. [2021-02-19 19:42:21,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 2.1744186046511627) internal successors, (374), 172 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:21,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 374 transitions. [2021-02-19 19:42:21,086 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 374 transitions. Word has length 23 [2021-02-19 19:42:21,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:21,087 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 374 transitions. [2021-02-19 19:42:21,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:21,087 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 374 transitions. [2021-02-19 19:42:21,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:21,095 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:21,096 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:21,317 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-02-19 19:42:21,318 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:21,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:21,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1848511515, now seen corresponding path program 8 times [2021-02-19 19:42:21,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:21,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384817878] [2021-02-19 19:42:21,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:21,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:21,413 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:21,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384817878] [2021-02-19 19:42:21,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596444219] [2021-02-19 19:42:21,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:21,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:21,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:21,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 14 conjunts are in the unsatisfiable core [2021-02-19 19:42:21,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:21,646 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:21,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:21,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-02-19 19:42:21,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104780074] [2021-02-19 19:42:21,647 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-02-19 19:42:21,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:21,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-02-19 19:42:21,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-02-19 19:42:21,649 INFO L87 Difference]: Start difference. First operand 173 states and 374 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:22,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:22,174 INFO L93 Difference]: Finished difference Result 435 states and 865 transitions. [2021-02-19 19:42:22,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:42:22,175 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:22,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:22,177 INFO L225 Difference]: With dead ends: 435 [2021-02-19 19:42:22,177 INFO L226 Difference]: Without dead ends: 417 [2021-02-19 19:42:22,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:42:22,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-02-19 19:42:22,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 186. [2021-02-19 19:42:22,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.156756756756757) internal successors, (399), 185 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:22,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 399 transitions. [2021-02-19 19:42:22,185 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 399 transitions. Word has length 25 [2021-02-19 19:42:22,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:22,185 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 399 transitions. [2021-02-19 19:42:22,185 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:22,185 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 399 transitions. [2021-02-19 19:42:22,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-02-19 19:42:22,186 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:22,186 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:22,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-02-19 19:42:22,398 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:22,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:22,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1212333669, now seen corresponding path program 9 times [2021-02-19 19:42:22,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:22,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461173548] [2021-02-19 19:42:22,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:22,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:22,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461173548] [2021-02-19 19:42:22,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771847717] [2021-02-19 19:42:22,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:22,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 19:42:22,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:22,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 13 conjunts are in the unsatisfiable core [2021-02-19 19:42:22,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:22,654 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:22,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:22,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 10] total 15 [2021-02-19 19:42:22,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734790012] [2021-02-19 19:42:22,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 19:42:22,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:22,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 19:42:22,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-02-19 19:42:22,657 INFO L87 Difference]: Start difference. First operand 186 states and 399 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:23,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:23,153 INFO L93 Difference]: Finished difference Result 340 states and 687 transitions. [2021-02-19 19:42:23,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 19:42:23,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-02-19 19:42:23,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:23,155 INFO L225 Difference]: With dead ends: 340 [2021-02-19 19:42:23,155 INFO L226 Difference]: Without dead ends: 336 [2021-02-19 19:42:23,156 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=368, Invalid=1038, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:42:23,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-02-19 19:42:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 186. [2021-02-19 19:42:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 2.151351351351351) internal successors, (398), 185 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 398 transitions. [2021-02-19 19:42:23,162 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 398 transitions. Word has length 25 [2021-02-19 19:42:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:23,162 INFO L480 AbstractCegarLoop]: Abstraction has 186 states and 398 transitions. [2021-02-19 19:42:23,162 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 398 transitions. [2021-02-19 19:42:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:23,163 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:23,163 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:23,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:23,378 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:23,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:23,379 INFO L82 PathProgramCache]: Analyzing trace with hash 774240483, now seen corresponding path program 10 times [2021-02-19 19:42:23,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:23,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608448584] [2021-02-19 19:42:23,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:23,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:23,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608448584] [2021-02-19 19:42:23,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14785479] [2021-02-19 19:42:23,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:42:23,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:42:23,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 15 conjunts are in the unsatisfiable core [2021-02-19 19:42:23,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:23,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:23,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 7 [2021-02-19 19:42:23,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48586074] [2021-02-19 19:42:23,549 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 19:42:23,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:23,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 19:42:23,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 19:42:23,550 INFO L87 Difference]: Start difference. First operand 186 states and 398 transitions. Second operand has 7 states, 7 states have (on average 4.285714285714286) 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) [2021-02-19 19:42:23,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:23,579 INFO L93 Difference]: Finished difference Result 354 states and 734 transitions. [2021-02-19 19:42:23,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 19:42:23,580 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.285714285714286) 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 27 [2021-02-19 19:42:23,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:23,581 INFO L225 Difference]: With dead ends: 354 [2021-02-19 19:42:23,581 INFO L226 Difference]: Without dead ends: 321 [2021-02-19 19:42:23,581 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-02-19 19:42:23,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-02-19 19:42:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 242. [2021-02-19 19:42:23,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.203319502074689) internal successors, (531), 241 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 531 transitions. [2021-02-19 19:42:23,591 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 531 transitions. Word has length 27 [2021-02-19 19:42:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:23,591 INFO L480 AbstractCegarLoop]: Abstraction has 242 states and 531 transitions. [2021-02-19 19:42:23,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.285714285714286) 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) [2021-02-19 19:42:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 531 transitions. [2021-02-19 19:42:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:23,593 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:23,593 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:23,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:23,798 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:23,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1055167051, now seen corresponding path program 11 times [2021-02-19 19:42:23,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:23,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469596484] [2021-02-19 19:42:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:23,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:23,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:23,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469596484] [2021-02-19 19:42:23,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042972227] [2021-02-19 19:42:23,930 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:23,949 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-02-19 19:42:23,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:23,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 19:42:23,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:24,163 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:24,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:24,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-02-19 19:42:24,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597298479] [2021-02-19 19:42:24,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 19:42:24,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:24,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 19:42:24,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:42:24,164 INFO L87 Difference]: Start difference. First operand 242 states and 531 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:24,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:24,891 INFO L93 Difference]: Finished difference Result 559 states and 1127 transitions. [2021-02-19 19:42:24,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:42:24,891 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:24,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:24,894 INFO L225 Difference]: With dead ends: 559 [2021-02-19 19:42:24,894 INFO L226 Difference]: Without dead ends: 553 [2021-02-19 19:42:24,894 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=368, Invalid=1702, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:42:24,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2021-02-19 19:42:24,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 234. [2021-02-19 19:42:24,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 234 states, 233 states have (on average 2.2060085836909873) internal successors, (514), 233 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:24,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 514 transitions. [2021-02-19 19:42:24,904 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 514 transitions. Word has length 27 [2021-02-19 19:42:24,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:24,904 INFO L480 AbstractCegarLoop]: Abstraction has 234 states and 514 transitions. [2021-02-19 19:42:24,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:24,904 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 514 transitions. [2021-02-19 19:42:24,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:24,905 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:24,905 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:25,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 19:42:25,122 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:25,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:25,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1069777095, now seen corresponding path program 12 times [2021-02-19 19:42:25,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:25,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073811389] [2021-02-19 19:42:25,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:25,248 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:25,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073811389] [2021-02-19 19:42:25,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792469662] [2021-02-19 19:42:25,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:25,269 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-02-19 19:42:25,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:25,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core [2021-02-19 19:42:25,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:25,470 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:25,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:25,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-02-19 19:42:25,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302744161] [2021-02-19 19:42:25,471 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 19:42:25,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:25,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 19:42:25,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:42:25,471 INFO L87 Difference]: Start difference. First operand 234 states and 514 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:26,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:26,214 INFO L93 Difference]: Finished difference Result 976 states and 2009 transitions. [2021-02-19 19:42:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:42:26,215 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:26,219 INFO L225 Difference]: With dead ends: 976 [2021-02-19 19:42:26,219 INFO L226 Difference]: Without dead ends: 940 [2021-02-19 19:42:26,220 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=488, Invalid=1864, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:42:26,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 940 states. [2021-02-19 19:42:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 940 to 311. [2021-02-19 19:42:26,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 2.229032258064516) internal successors, (691), 310 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:26,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 691 transitions. [2021-02-19 19:42:26,232 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 691 transitions. Word has length 27 [2021-02-19 19:42:26,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:26,232 INFO L480 AbstractCegarLoop]: Abstraction has 311 states and 691 transitions. [2021-02-19 19:42:26,232 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 691 transitions. [2021-02-19 19:42:26,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-02-19 19:42:26,234 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:26,234 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:26,452 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 19:42:26,452 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:26,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:26,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1800143005, now seen corresponding path program 13 times [2021-02-19 19:42:26,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:26,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130664256] [2021-02-19 19:42:26,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:26,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:26,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:26,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130664256] [2021-02-19 19:42:26,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131719482] [2021-02-19 19:42:26,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:42:26,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 16 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:26,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:26,804 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:26,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:26,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2021-02-19 19:42:26,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935473409] [2021-02-19 19:42:26,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-02-19 19:42:26,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:26,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-02-19 19:42:26,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2021-02-19 19:42:26,806 INFO L87 Difference]: Start difference. First operand 311 states and 691 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-02-19 19:42:27,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:27,585 INFO L93 Difference]: Finished difference Result 802 states and 1701 transitions. [2021-02-19 19:42:27,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 19:42:27,586 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-02-19 19:42:27,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:27,589 INFO L225 Difference]: With dead ends: 802 [2021-02-19 19:42:27,589 INFO L226 Difference]: Without dead ends: 794 [2021-02-19 19:42:27,590 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=469, Invalid=1981, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:42:27,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2021-02-19 19:42:27,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 259. [2021-02-19 19:42:27,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 2.182170542635659) internal successors, (563), 258 states have internal predecessors, (563), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 563 transitions. [2021-02-19 19:42:27,599 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 563 transitions. Word has length 27 [2021-02-19 19:42:27,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:27,599 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 563 transitions. [2021-02-19 19:42:27,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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) [2021-02-19 19:42:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 563 transitions. [2021-02-19 19:42:27,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:42:27,600 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:27,600 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:27,814 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 19:42:27,814 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:27,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:27,814 INFO L82 PathProgramCache]: Analyzing trace with hash 330418977, now seen corresponding path program 14 times [2021-02-19 19:42:27,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:27,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478847213] [2021-02-19 19:42:27,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:27,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:27,919 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:27,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478847213] [2021-02-19 19:42:27,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590937519] [2021-02-19 19:42:27,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:42:27,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:27,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:27,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 19:42:27,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:28,195 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:28,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:28,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-02-19 19:42:28,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360765820] [2021-02-19 19:42:28,196 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:28,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:28,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:28,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=436, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:28,197 INFO L87 Difference]: Start difference. First operand 259 states and 563 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:29,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:29,036 INFO L93 Difference]: Finished difference Result 680 states and 1358 transitions. [2021-02-19 19:42:29,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:42:29,036 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:42:29,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:29,039 INFO L225 Difference]: With dead ends: 680 [2021-02-19 19:42:29,039 INFO L226 Difference]: Without dead ends: 638 [2021-02-19 19:42:29,040 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=840, Invalid=2352, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 19:42:29,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 638 states. [2021-02-19 19:42:29,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 638 to 270. [2021-02-19 19:42:29,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.163568773234201) internal successors, (582), 269 states have internal predecessors, (582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:29,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 582 transitions. [2021-02-19 19:42:29,048 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 582 transitions. Word has length 29 [2021-02-19 19:42:29,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:29,048 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 582 transitions. [2021-02-19 19:42:29,048 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:29,049 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 582 transitions. [2021-02-19 19:42:29,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 19:42:29,049 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:29,049 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:29,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:29,271 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:29,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:29,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1398304741, now seen corresponding path program 15 times [2021-02-19 19:42:29,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:29,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350713530] [2021-02-19 19:42:29,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:29,345 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:29,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350713530] [2021-02-19 19:42:29,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992636443] [2021-02-19 19:42:29,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:42:29,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 19:42:29,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:29,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:42:29,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:29,598 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:29,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:29,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 12] total 18 [2021-02-19 19:42:29,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497942114] [2021-02-19 19:42:29,601 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 19:42:29,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:29,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 19:42:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-02-19 19:42:29,601 INFO L87 Difference]: Start difference. First operand 270 states and 582 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:30,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:30,336 INFO L93 Difference]: Finished difference Result 520 states and 1058 transitions. [2021-02-19 19:42:30,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 19:42:30,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-02-19 19:42:30,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:30,339 INFO L225 Difference]: With dead ends: 520 [2021-02-19 19:42:30,339 INFO L226 Difference]: Without dead ends: 516 [2021-02-19 19:42:30,340 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=661, Invalid=1991, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 19:42:30,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2021-02-19 19:42:30,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 270. [2021-02-19 19:42:30,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.159851301115242) internal successors, (581), 269 states have internal predecessors, (581), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:30,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 581 transitions. [2021-02-19 19:42:30,347 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 581 transitions. Word has length 29 [2021-02-19 19:42:30,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:30,348 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 581 transitions. [2021-02-19 19:42:30,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:30,348 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 581 transitions. [2021-02-19 19:42:30,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:42:30,349 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:30,349 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:30,554 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:30,554 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:30,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:30,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1217597153, now seen corresponding path program 16 times [2021-02-19 19:42:30,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:30,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148414387] [2021-02-19 19:42:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:30,637 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:30,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148414387] [2021-02-19 19:42:30,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381129921] [2021-02-19 19:42:30,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:42:30,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:42:30,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:30,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 19:42:30,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:30,743 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:30,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:30,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 8 [2021-02-19 19:42:30,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298934633] [2021-02-19 19:42:30,744 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 19:42:30,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:30,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 19:42:30,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:42:30,745 INFO L87 Difference]: Start difference. First operand 270 states and 581 transitions. Second operand has 8 states, 8 states have (on average 4.25) 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) [2021-02-19 19:42:30,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:30,786 INFO L93 Difference]: Finished difference Result 492 states and 1028 transitions. [2021-02-19 19:42:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-02-19 19:42:30,787 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) 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 31 [2021-02-19 19:42:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:30,788 INFO L225 Difference]: With dead ends: 492 [2021-02-19 19:42:30,788 INFO L226 Difference]: Without dead ends: 453 [2021-02-19 19:42:30,788 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 19:42:30,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-02-19 19:42:30,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 337. [2021-02-19 19:42:30,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.1845238095238093) internal successors, (734), 336 states have internal predecessors, (734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:30,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 734 transitions. [2021-02-19 19:42:30,798 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 734 transitions. Word has length 31 [2021-02-19 19:42:30,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:30,798 INFO L480 AbstractCegarLoop]: Abstraction has 337 states and 734 transitions. [2021-02-19 19:42:30,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) 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) [2021-02-19 19:42:30,799 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 734 transitions. [2021-02-19 19:42:30,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:42:30,799 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:30,800 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:31,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:31,022 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:31,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:31,022 INFO L82 PathProgramCache]: Analyzing trace with hash 477532273, now seen corresponding path program 17 times [2021-02-19 19:42:31,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:31,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798510307] [2021-02-19 19:42:31,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:31,172 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:31,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798510307] [2021-02-19 19:42:31,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653727086] [2021-02-19 19:42:31,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:31,195 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 19:42:31,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:31,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:42:31,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:31,468 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:31,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:31,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-02-19 19:42:31,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401296307] [2021-02-19 19:42:31,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 19:42:31,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:31,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 19:42:31,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:42:31,470 INFO L87 Difference]: Start difference. First operand 337 states and 734 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:32,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:32,511 INFO L93 Difference]: Finished difference Result 772 states and 1552 transitions. [2021-02-19 19:42:32,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-02-19 19:42:32,511 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:42:32,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:32,514 INFO L225 Difference]: With dead ends: 772 [2021-02-19 19:42:32,515 INFO L226 Difference]: Without dead ends: 766 [2021-02-19 19:42:32,516 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 785 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=490, Invalid=2816, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 19:42:32,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 766 states. [2021-02-19 19:42:32,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 766 to 328. [2021-02-19 19:42:32,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 2.2110091743119265) internal successors, (723), 327 states have internal predecessors, (723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:32,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 723 transitions. [2021-02-19 19:42:32,525 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 723 transitions. Word has length 31 [2021-02-19 19:42:32,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:32,525 INFO L480 AbstractCegarLoop]: Abstraction has 328 states and 723 transitions. [2021-02-19 19:42:32,525 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:32,525 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 723 transitions. [2021-02-19 19:42:32,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:42:32,526 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:32,526 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:32,742 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-02-19 19:42:32,742 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:32,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:32,742 INFO L82 PathProgramCache]: Analyzing trace with hash -601280011, now seen corresponding path program 18 times [2021-02-19 19:42:32,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:32,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507847662] [2021-02-19 19:42:32,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:32,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:32,891 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:32,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507847662] [2021-02-19 19:42:32,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570107386] [2021-02-19 19:42:32,891 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:32,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-02-19 19:42:32,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:32,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:42:32,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:33,202 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:33,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:33,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-02-19 19:42:33,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270016080] [2021-02-19 19:42:33,204 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:42:33,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:33,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:42:33,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:42:33,205 INFO L87 Difference]: Start difference. First operand 328 states and 723 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:34,461 INFO L93 Difference]: Finished difference Result 1342 states and 2716 transitions. [2021-02-19 19:42:34,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 19:42:34,461 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:42:34,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:34,465 INFO L225 Difference]: With dead ends: 1342 [2021-02-19 19:42:34,465 INFO L226 Difference]: Without dead ends: 1318 [2021-02-19 19:42:34,467 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1165 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=720, Invalid=3312, Unknown=0, NotChecked=0, Total=4032 [2021-02-19 19:42:34,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1318 states. [2021-02-19 19:42:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1318 to 404. [2021-02-19 19:42:34,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 403 states have (on average 2.2531017369727047) internal successors, (908), 403 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:34,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 908 transitions. [2021-02-19 19:42:34,480 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 908 transitions. Word has length 31 [2021-02-19 19:42:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:34,480 INFO L480 AbstractCegarLoop]: Abstraction has 404 states and 908 transitions. [2021-02-19 19:42:34,481 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:34,481 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 908 transitions. [2021-02-19 19:42:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:42:34,482 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:34,482 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:34,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-02-19 19:42:34,695 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:34,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1331645921, now seen corresponding path program 19 times [2021-02-19 19:42:34,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:34,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162344306] [2021-02-19 19:42:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:34,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:34,802 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:34,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162344306] [2021-02-19 19:42:34,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029621321] [2021-02-19 19:42:34,802 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:42:34,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:34,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:42:34,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:35,099 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 7 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:35,100 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:35,100 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 14] total 23 [2021-02-19 19:42:35,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476383740] [2021-02-19 19:42:35,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-02-19 19:42:35,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:35,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-02-19 19:42:35,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-02-19 19:42:35,101 INFO L87 Difference]: Start difference. First operand 404 states and 908 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:36,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:36,194 INFO L93 Difference]: Finished difference Result 1094 states and 2288 transitions. [2021-02-19 19:42:36,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 19:42:36,195 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:42:36,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:36,197 INFO L225 Difference]: With dead ends: 1094 [2021-02-19 19:42:36,197 INFO L226 Difference]: Without dead ends: 1090 [2021-02-19 19:42:36,198 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=599, Invalid=3061, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:42:36,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1090 states. [2021-02-19 19:42:36,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1090 to 333. [2021-02-19 19:42:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.2198795180722892) internal successors, (737), 332 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 737 transitions. [2021-02-19 19:42:36,210 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 737 transitions. Word has length 31 [2021-02-19 19:42:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:36,210 INFO L480 AbstractCegarLoop]: Abstraction has 333 states and 737 transitions. [2021-02-19 19:42:36,210 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:36,210 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 737 transitions. [2021-02-19 19:42:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:42:36,212 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:36,212 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:36,433 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-02-19 19:42:36,434 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:36,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:36,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1708490631, now seen corresponding path program 20 times [2021-02-19 19:42:36,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:36,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645707485] [2021-02-19 19:42:36,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:36,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:36,565 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:36,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645707485] [2021-02-19 19:42:36,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125119198] [2021-02-19 19:42:36,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:36,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:36,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:36,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 19 conjunts are in the unsatisfiable core [2021-02-19 19:42:36,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:36,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:36,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:36,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 25 [2021-02-19 19:42:36,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921775843] [2021-02-19 19:42:36,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-02-19 19:42:36,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:36,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-02-19 19:42:36,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=543, Unknown=0, NotChecked=0, Total=650 [2021-02-19 19:42:36,851 INFO L87 Difference]: Start difference. First operand 333 states and 737 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:37,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:37,770 INFO L93 Difference]: Finished difference Result 1727 states and 3552 transitions. [2021-02-19 19:42:37,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 19:42:37,774 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:42:37,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:37,778 INFO L225 Difference]: With dead ends: 1727 [2021-02-19 19:42:37,778 INFO L226 Difference]: Without dead ends: 1631 [2021-02-19 19:42:37,779 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=702, Invalid=2958, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 19:42:37,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1631 states. [2021-02-19 19:42:37,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1631 to 419. [2021-02-19 19:42:37,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 418 states have (on average 2.229665071770335) internal successors, (932), 418 states have internal predecessors, (932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 932 transitions. [2021-02-19 19:42:37,791 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 932 transitions. Word has length 31 [2021-02-19 19:42:37,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:37,791 INFO L480 AbstractCegarLoop]: Abstraction has 419 states and 932 transitions. [2021-02-19 19:42:37,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 932 transitions. [2021-02-19 19:42:37,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-02-19 19:42:37,792 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:37,792 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:38,011 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-02-19 19:42:38,011 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:38,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:38,011 INFO L82 PathProgramCache]: Analyzing trace with hash 60395439, now seen corresponding path program 21 times [2021-02-19 19:42:38,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:38,011 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311661073] [2021-02-19 19:42:38,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:38,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:38,093 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:38,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311661073] [2021-02-19 19:42:38,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068861099] [2021-02-19 19:42:38,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:42:38,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-02-19 19:42:38,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:38,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 19:42:38,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:38,397 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 11 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:38,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:38,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 22 [2021-02-19 19:42:38,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612383315] [2021-02-19 19:42:38,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 19:42:38,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:38,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 19:42:38,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2021-02-19 19:42:38,398 INFO L87 Difference]: Start difference. First operand 419 states and 932 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-02-19 19:42:39,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:39,521 INFO L93 Difference]: Finished difference Result 1314 states and 2779 transitions. [2021-02-19 19:42:39,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 19:42:39,522 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-02-19 19:42:39,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:39,526 INFO L225 Difference]: With dead ends: 1314 [2021-02-19 19:42:39,526 INFO L226 Difference]: Without dead ends: 1310 [2021-02-19 19:42:39,527 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1423 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1021, Invalid=3535, Unknown=0, NotChecked=0, Total=4556 [2021-02-19 19:42:39,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1310 states. [2021-02-19 19:42:39,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1310 to 563. [2021-02-19 19:42:39,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 563 states, 562 states have (on average 2.314946619217082) internal successors, (1301), 562 states have internal predecessors, (1301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 563 states to 563 states and 1301 transitions. [2021-02-19 19:42:39,540 INFO L78 Accepts]: Start accepts. Automaton has 563 states and 1301 transitions. Word has length 31 [2021-02-19 19:42:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:39,540 INFO L480 AbstractCegarLoop]: Abstraction has 563 states and 1301 transitions. [2021-02-19 19:42:39,540 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 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) [2021-02-19 19:42:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 563 states and 1301 transitions. [2021-02-19 19:42:39,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:42:39,541 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:39,541 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:39,763 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:39,763 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:39,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:39,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1915319389, now seen corresponding path program 22 times [2021-02-19 19:42:39,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:39,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108167007] [2021-02-19 19:42:39,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:39,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:39,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108167007] [2021-02-19 19:42:39,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352808550] [2021-02-19 19:42:39,881 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:42:39,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:42:39,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:42:39,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:40,192 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:40,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:40,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-02-19 19:42:40,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756716915] [2021-02-19 19:42:40,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:42:40,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:40,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:42:40,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:42:40,194 INFO L87 Difference]: Start difference. First operand 563 states and 1301 transitions. Second operand has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:41,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:41,270 INFO L93 Difference]: Finished difference Result 1171 states and 2456 transitions. [2021-02-19 19:42:41,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 19:42:41,270 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:42:41,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:41,273 INFO L225 Difference]: With dead ends: 1171 [2021-02-19 19:42:41,273 INFO L226 Difference]: Without dead ends: 1099 [2021-02-19 19:42:41,274 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1517 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1404, Invalid=3998, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 19:42:41,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1099 states. [2021-02-19 19:42:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1099 to 572. [2021-02-19 19:42:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.3012259194395797) internal successors, (1314), 571 states have internal predecessors, (1314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:41,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1314 transitions. [2021-02-19 19:42:41,283 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1314 transitions. Word has length 33 [2021-02-19 19:42:41,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:41,283 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1314 transitions. [2021-02-19 19:42:41,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.1785714285714284) internal successors, (61), 27 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:41,283 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1314 transitions. [2021-02-19 19:42:41,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 19:42:41,285 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:41,285 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:41,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:41,498 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:41,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:41,498 INFO L82 PathProgramCache]: Analyzing trace with hash -446107749, now seen corresponding path program 23 times [2021-02-19 19:42:41,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:41,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449570938] [2021-02-19 19:42:41,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:41,564 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:41,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449570938] [2021-02-19 19:42:41,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501722934] [2021-02-19 19:42:41,564 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 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 [2021-02-19 19:42:41,585 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-02-19 19:42:41,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:41,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 17 conjunts are in the unsatisfiable core [2021-02-19 19:42:41,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:41,886 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:41,887 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:41,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14] total 21 [2021-02-19 19:42:41,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727621787] [2021-02-19 19:42:41,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 19:42:41,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:41,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 19:42:41,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2021-02-19 19:42:41,888 INFO L87 Difference]: Start difference. First operand 572 states and 1314 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2021-02-19 19:42:43,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:43,478 INFO L93 Difference]: Finished difference Result 984 states and 2110 transitions. [2021-02-19 19:42:43,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-02-19 19:42:43,479 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 19:42:43,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:43,482 INFO L225 Difference]: With dead ends: 984 [2021-02-19 19:42:43,482 INFO L226 Difference]: Without dead ends: 980 [2021-02-19 19:42:43,484 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2577 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1834, Invalid=5822, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 19:42:43,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 980 states. [2021-02-19 19:42:43,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 980 to 572. [2021-02-19 19:42:43,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2994746059544657) internal successors, (1313), 571 states have internal predecessors, (1313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:43,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1313 transitions. [2021-02-19 19:42:43,495 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1313 transitions. Word has length 33 [2021-02-19 19:42:43,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:43,495 INFO L480 AbstractCegarLoop]: Abstraction has 572 states and 1313 transitions. [2021-02-19 19:42:43,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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) [2021-02-19 19:42:43,495 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1313 transitions. [2021-02-19 19:42:43,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:42:43,497 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:43,497 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:43,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-02-19 19:42:43,710 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:43,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:43,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1453275995, now seen corresponding path program 24 times [2021-02-19 19:42:43,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:43,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980534669] [2021-02-19 19:42:43,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:43,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980534669] [2021-02-19 19:42:43,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285042357] [2021-02-19 19:42:43,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:43,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-02-19 19:42:43,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:43,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 23 conjunts are in the unsatisfiable core [2021-02-19 19:42:43,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:43,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:43,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 9 [2021-02-19 19:42:43,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320703785] [2021-02-19 19:42:43,913 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-02-19 19:42:43,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:43,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-02-19 19:42:43,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:42:43,915 INFO L87 Difference]: Start difference. First operand 572 states and 1313 transitions. Second operand has 9 states, 9 states have (on average 4.222222222222222) 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) [2021-02-19 19:42:43,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:43,970 INFO L93 Difference]: Finished difference Result 922 states and 2046 transitions. [2021-02-19 19:42:43,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 19:42:43,970 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.222222222222222) 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 35 [2021-02-19 19:42:43,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:43,972 INFO L225 Difference]: With dead ends: 922 [2021-02-19 19:42:43,972 INFO L226 Difference]: Without dead ends: 877 [2021-02-19 19:42:43,972 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-02-19 19:42:43,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 877 states. [2021-02-19 19:42:43,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 877 to 720. [2021-02-19 19:42:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 719 states have (on average 2.3379694019471486) internal successors, (1681), 719 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:43,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 1681 transitions. [2021-02-19 19:42:43,984 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 1681 transitions. Word has length 35 [2021-02-19 19:42:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:43,984 INFO L480 AbstractCegarLoop]: Abstraction has 720 states and 1681 transitions. [2021-02-19 19:42:43,985 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.222222222222222) 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) [2021-02-19 19:42:43,985 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 1681 transitions. [2021-02-19 19:42:43,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:42:43,986 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:43,986 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:44,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:44,207 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:44,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:44,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1499227437, now seen corresponding path program 25 times [2021-02-19 19:42:44,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:44,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310245457] [2021-02-19 19:42:44,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:44,380 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:44,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310245457] [2021-02-19 19:42:44,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323929967] [2021-02-19 19:42:44,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:44,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:44,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:42:44,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:44,762 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:44,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:44,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15] total 29 [2021-02-19 19:42:44,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732345762] [2021-02-19 19:42:44,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 19:42:44,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:44,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 19:42:44,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=761, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:42:44,764 INFO L87 Difference]: Start difference. First operand 720 states and 1681 transitions. Second operand has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:46,237 INFO L93 Difference]: Finished difference Result 1286 states and 2740 transitions. [2021-02-19 19:42:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 19:42:46,238 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:42:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:46,241 INFO L225 Difference]: With dead ends: 1286 [2021-02-19 19:42:46,241 INFO L226 Difference]: Without dead ends: 1280 [2021-02-19 19:42:46,242 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1182 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=612, Invalid=4218, Unknown=0, NotChecked=0, Total=4830 [2021-02-19 19:42:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1280 states. [2021-02-19 19:42:46,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1280 to 707. [2021-02-19 19:42:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 2.3427762039660056) internal successors, (1654), 706 states have internal predecessors, (1654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:46,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 1654 transitions. [2021-02-19 19:42:46,255 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 1654 transitions. Word has length 35 [2021-02-19 19:42:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:46,255 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 1654 transitions. [2021-02-19 19:42:46,255 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.1666666666666665) internal successors, (65), 29 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:46,255 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 1654 transitions. [2021-02-19 19:42:46,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:42:46,257 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:46,257 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:46,473 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 19:42:46,474 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:46,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:46,474 INFO L82 PathProgramCache]: Analyzing trace with hash -75721039, now seen corresponding path program 26 times [2021-02-19 19:42:46,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:46,474 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225621811] [2021-02-19 19:42:46,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:46,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:46,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225621811] [2021-02-19 19:42:46,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362665024] [2021-02-19 19:42:46,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:46,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:46,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:46,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:42:46,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:46,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:46,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 27 [2021-02-19 19:42:46,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112462078] [2021-02-19 19:42:46,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-02-19 19:42:46,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:46,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-02-19 19:42:46,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-02-19 19:42:46,997 INFO L87 Difference]: Start difference. First operand 707 states and 1654 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:48,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:48,727 INFO L93 Difference]: Finished difference Result 2198 states and 4644 transitions. [2021-02-19 19:42:48,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-02-19 19:42:48,727 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:42:48,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:48,732 INFO L225 Difference]: With dead ends: 2198 [2021-02-19 19:42:48,732 INFO L226 Difference]: Without dead ends: 2174 [2021-02-19 19:42:48,733 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=967, Invalid=5353, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 19:42:48,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2174 states. [2021-02-19 19:42:48,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2174 to 830. [2021-02-19 19:42:48,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 830 states, 829 states have (on average 2.365500603136309) internal successors, (1961), 829 states have internal predecessors, (1961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:48,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 830 states to 830 states and 1961 transitions. [2021-02-19 19:42:48,748 INFO L78 Accepts]: Start accepts. Automaton has 830 states and 1961 transitions. Word has length 35 [2021-02-19 19:42:48,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:48,748 INFO L480 AbstractCegarLoop]: Abstraction has 830 states and 1961 transitions. [2021-02-19 19:42:48,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 27 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:48,748 INFO L276 IsEmpty]: Start isEmpty. Operand 830 states and 1961 transitions. [2021-02-19 19:42:48,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:42:48,750 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:48,750 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:48,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-02-19 19:42:48,971 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:48,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:48,972 INFO L82 PathProgramCache]: Analyzing trace with hash -806086949, now seen corresponding path program 27 times [2021-02-19 19:42:48,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:48,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128030491] [2021-02-19 19:42:48,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:48,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:49,129 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:49,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128030491] [2021-02-19 19:42:49,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125484909] [2021-02-19 19:42:49,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:49,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 19:42:49,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:49,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:42:49,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:49,459 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:49,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:49,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 26 [2021-02-19 19:42:49,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990303939] [2021-02-19 19:42:49,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:49,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:49,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:49,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=586, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:49,460 INFO L87 Difference]: Start difference. First operand 830 states and 1961 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:50,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:50,191 INFO L93 Difference]: Finished difference Result 1909 states and 4177 transitions. [2021-02-19 19:42:50,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 19:42:50,192 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:42:50,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:50,198 INFO L225 Difference]: With dead ends: 1909 [2021-02-19 19:42:50,198 INFO L226 Difference]: Without dead ends: 1905 [2021-02-19 19:42:50,199 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=348, Invalid=1632, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:42:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1905 states. [2021-02-19 19:42:50,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1905 to 891. [2021-02-19 19:42:50,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 891 states, 890 states have (on average 2.344943820224719) internal successors, (2087), 890 states have internal predecessors, (2087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:50,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 891 states to 891 states and 2087 transitions. [2021-02-19 19:42:50,216 INFO L78 Accepts]: Start accepts. Automaton has 891 states and 2087 transitions. Word has length 35 [2021-02-19 19:42:50,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:50,217 INFO L480 AbstractCegarLoop]: Abstraction has 891 states and 2087 transitions. [2021-02-19 19:42:50,217 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:50,217 INFO L276 IsEmpty]: Start isEmpty. Operand 891 states and 2087 transitions. [2021-02-19 19:42:50,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:42:50,218 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:50,218 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:50,440 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-02-19 19:42:50,440 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:50,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:50,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1228442315, now seen corresponding path program 28 times [2021-02-19 19:42:50,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:50,441 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668917637] [2021-02-19 19:42:50,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:50,587 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:50,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668917637] [2021-02-19 19:42:50,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675281257] [2021-02-19 19:42:50,587 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:50,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:42:50,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:50,608 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:42:50,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:50,940 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 2 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:50,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:50,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-02-19 19:42:50,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170583535] [2021-02-19 19:42:50,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 19:42:50,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:50,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 19:42:50,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=689, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:42:50,942 INFO L87 Difference]: Start difference. First operand 891 states and 2087 transitions. Second operand has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:52,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:52,710 INFO L93 Difference]: Finished difference Result 2946 states and 6225 transitions. [2021-02-19 19:42:52,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 19:42:52,710 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:42:52,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:52,719 INFO L225 Difference]: With dead ends: 2946 [2021-02-19 19:42:52,719 INFO L226 Difference]: Without dead ends: 2850 [2021-02-19 19:42:52,720 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2239 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1231, Invalid=5741, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 19:42:52,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2850 states. [2021-02-19 19:42:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2850 to 850. [2021-02-19 19:42:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.3568904593639575) internal successors, (2001), 849 states have internal predecessors, (2001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:52,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 2001 transitions. [2021-02-19 19:42:52,738 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 2001 transitions. Word has length 35 [2021-02-19 19:42:52,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:52,738 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 2001 transitions. [2021-02-19 19:42:52,738 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:52,738 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 2001 transitions. [2021-02-19 19:42:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:42:52,740 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:52,740 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:52,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 19:42:52,961 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:52,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:52,961 INFO L82 PathProgramCache]: Analyzing trace with hash 781631673, now seen corresponding path program 29 times [2021-02-19 19:42:52,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:52,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094816572] [2021-02-19 19:42:52,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:53,099 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:53,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094816572] [2021-02-19 19:42:53,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887994970] [2021-02-19 19:42:53,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:53,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-02-19 19:42:53,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:53,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:42:53,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:53,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:53,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-02-19 19:42:53,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440091699] [2021-02-19 19:42:53,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:42:53,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:53,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:42:53,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=784, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:42:53,490 INFO L87 Difference]: Start difference. First operand 850 states and 2001 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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) [2021-02-19 19:42:55,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:55,052 INFO L93 Difference]: Finished difference Result 3270 states and 6974 transitions. [2021-02-19 19:42:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-02-19 19:42:55,052 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:42:55,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:55,058 INFO L225 Difference]: With dead ends: 3270 [2021-02-19 19:42:55,058 INFO L226 Difference]: Without dead ends: 3096 [2021-02-19 19:42:55,059 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2431 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1489, Invalid=5993, Unknown=0, NotChecked=0, Total=7482 [2021-02-19 19:42:55,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3096 states. [2021-02-19 19:42:55,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3096 to 889. [2021-02-19 19:42:55,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 889 states, 888 states have (on average 2.2905405405405403) internal successors, (2034), 888 states have internal predecessors, (2034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:55,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 889 states to 889 states and 2034 transitions. [2021-02-19 19:42:55,081 INFO L78 Accepts]: Start accepts. Automaton has 889 states and 2034 transitions. Word has length 35 [2021-02-19 19:42:55,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:55,082 INFO L480 AbstractCegarLoop]: Abstraction has 889 states and 2034 transitions. [2021-02-19 19:42:55,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 30 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) [2021-02-19 19:42:55,082 INFO L276 IsEmpty]: Start isEmpty. Operand 889 states and 2034 transitions. [2021-02-19 19:42:55,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-02-19 19:42:55,084 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:55,084 INFO L506 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:55,294 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-02-19 19:42:55,294 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:55,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:55,294 INFO L82 PathProgramCache]: Analyzing trace with hash -245623701, now seen corresponding path program 30 times [2021-02-19 19:42:55,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:55,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852914841] [2021-02-19 19:42:55,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:55,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:55,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852914841] [2021-02-19 19:42:55,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561996087] [2021-02-19 19:42:55,401 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:42:55,434 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 19:42:55,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:55,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 19:42:55,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:55,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:55,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16] total 26 [2021-02-19 19:42:55,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948930484] [2021-02-19 19:42:55,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 19:42:55,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:55,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 19:42:55,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2021-02-19 19:42:55,807 INFO L87 Difference]: Start difference. First operand 889 states and 2034 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:57,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:57,120 INFO L93 Difference]: Finished difference Result 2421 states and 5273 transitions. [2021-02-19 19:42:57,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 19:42:57,120 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-02-19 19:42:57,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:57,124 INFO L225 Difference]: With dead ends: 2421 [2021-02-19 19:42:57,124 INFO L226 Difference]: Without dead ends: 2417 [2021-02-19 19:42:57,124 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1867 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1155, Invalid=4851, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 19:42:57,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2417 states. [2021-02-19 19:42:57,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2417 to 742. [2021-02-19 19:42:57,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 742 states, 741 states have (on average 2.2672064777327936) internal successors, (1680), 741 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:57,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 742 states to 742 states and 1680 transitions. [2021-02-19 19:42:57,140 INFO L78 Accepts]: Start accepts. Automaton has 742 states and 1680 transitions. Word has length 35 [2021-02-19 19:42:57,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:57,140 INFO L480 AbstractCegarLoop]: Abstraction has 742 states and 1680 transitions. [2021-02-19 19:42:57,140 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:57,140 INFO L276 IsEmpty]: Start isEmpty. Operand 742 states and 1680 transitions. [2021-02-19 19:42:57,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:42:57,142 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:57,142 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:57,363 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:57,363 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:57,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1932791911, now seen corresponding path program 31 times [2021-02-19 19:42:57,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:57,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676521104] [2021-02-19 19:42:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:57,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676521104] [2021-02-19 19:42:57,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440250128] [2021-02-19 19:42:57,520 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:57,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-02-19 19:42:57,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:42:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:57,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:42:57,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-02-19 19:42:57,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400938182] [2021-02-19 19:42:57,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 19:42:57,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:42:57,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 19:42:57,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:42:57,953 INFO L87 Difference]: Start difference. First operand 742 states and 1680 transitions. Second operand has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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) [2021-02-19 19:42:59,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:42:59,566 INFO L93 Difference]: Finished difference Result 1553 states and 3227 transitions. [2021-02-19 19:42:59,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 19:42:59,567 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:42:59,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:42:59,568 INFO L225 Difference]: With dead ends: 1553 [2021-02-19 19:42:59,568 INFO L226 Difference]: Without dead ends: 1445 [2021-02-19 19:42:59,569 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2584 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2214, Invalid=6342, Unknown=0, NotChecked=0, Total=8556 [2021-02-19 19:42:59,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-02-19 19:42:59,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 749. [2021-02-19 19:42:59,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.2553475935828877) internal successors, (1687), 748 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:42:59,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1687 transitions. [2021-02-19 19:42:59,580 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1687 transitions. Word has length 37 [2021-02-19 19:42:59,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:42:59,580 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1687 transitions. [2021-02-19 19:42:59,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.15625) internal successors, (69), 31 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) [2021-02-19 19:42:59,581 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1687 transitions. [2021-02-19 19:42:59,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 19:42:59,582 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:42:59,582 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:42:59,796 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:42:59,796 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:42:59,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:42:59,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1858117659, now seen corresponding path program 32 times [2021-02-19 19:42:59,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:42:59,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311079126] [2021-02-19 19:42:59,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:42:59,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:42:59,872 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:42:59,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311079126] [2021-02-19 19:42:59,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337967580] [2021-02-19 19:42:59,873 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 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 [2021-02-19 19:42:59,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:42:59,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:42:59,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 25 conjunts are in the unsatisfiable core [2021-02-19 19:42:59,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:00,190 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 31 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:00,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:00,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 16] total 24 [2021-02-19 19:43:00,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156722861] [2021-02-19 19:43:00,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-02-19 19:43:00,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:00,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-02-19 19:43:00,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2021-02-19 19:43:00,192 INFO L87 Difference]: Start difference. First operand 749 states and 1687 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:01,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:01,637 INFO L93 Difference]: Finished difference Result 1245 states and 2647 transitions. [2021-02-19 19:43:01,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 19:43:01,637 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-02-19 19:43:01,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:01,639 INFO L225 Difference]: With dead ends: 1245 [2021-02-19 19:43:01,639 INFO L226 Difference]: Without dead ends: 1241 [2021-02-19 19:43:01,640 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2330 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1742, Invalid=5568, Unknown=0, NotChecked=0, Total=7310 [2021-02-19 19:43:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2021-02-19 19:43:01,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 749. [2021-02-19 19:43:01,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 749 states, 748 states have (on average 2.2540106951871657) internal successors, (1686), 748 states have internal predecessors, (1686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:01,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1686 transitions. [2021-02-19 19:43:01,652 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1686 transitions. Word has length 37 [2021-02-19 19:43:01,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:01,652 INFO L480 AbstractCegarLoop]: Abstraction has 749 states and 1686 transitions. [2021-02-19 19:43:01,653 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:01,653 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1686 transitions. [2021-02-19 19:43:01,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:43:01,654 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:01,654 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:01,870 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-02-19 19:43:01,870 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:01,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:01,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1385158551, now seen corresponding path program 33 times [2021-02-19 19:43:01,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:01,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226605954] [2021-02-19 19:43:01,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:01,987 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 1 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:01,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226605954] [2021-02-19 19:43:01,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046782860] [2021-02-19 19:43:01,988 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:43:02,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-02-19 19:43:02,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:02,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 27 conjunts are in the unsatisfiable core [2021-02-19 19:43:02,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:02,160 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 9 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:02,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:02,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 14] total 15 [2021-02-19 19:43:02,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793203985] [2021-02-19 19:43:02,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 19:43:02,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:02,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 19:43:02,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-02-19 19:43:02,161 INFO L87 Difference]: Start difference. First operand 749 states and 1686 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-02-19 19:43:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:02,298 INFO L93 Difference]: Finished difference Result 1189 states and 2590 transitions. [2021-02-19 19:43:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 19:43:02,299 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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 39 [2021-02-19 19:43:02,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:02,301 INFO L225 Difference]: With dead ends: 1189 [2021-02-19 19:43:02,301 INFO L226 Difference]: Without dead ends: 1129 [2021-02-19 19:43:02,301 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-02-19 19:43:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1129 states. [2021-02-19 19:43:02,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1129 to 895. [2021-02-19 19:43:02,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 895 states, 894 states have (on average 2.2740492170022373) internal successors, (2033), 894 states have internal predecessors, (2033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:02,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 895 states to 895 states and 2033 transitions. [2021-02-19 19:43:02,315 INFO L78 Accepts]: Start accepts. Automaton has 895 states and 2033 transitions. Word has length 39 [2021-02-19 19:43:02,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:02,315 INFO L480 AbstractCegarLoop]: Abstraction has 895 states and 2033 transitions. [2021-02-19 19:43:02,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 15 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) [2021-02-19 19:43:02,315 INFO L276 IsEmpty]: Start isEmpty. Operand 895 states and 2033 transitions. [2021-02-19 19:43:02,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:43:02,317 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:02,317 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:02,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:02,530 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:02,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash -206459539, now seen corresponding path program 34 times [2021-02-19 19:43:02,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:02,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076995254] [2021-02-19 19:43:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:02,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:02,684 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:02,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076995254] [2021-02-19 19:43:02,685 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [782573375] [2021-02-19 19:43:02,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:02,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:43:02,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:02,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 19:43:02,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:03,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:03,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2021-02-19 19:43:03,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500250994] [2021-02-19 19:43:03,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:43:03,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:03,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:43:03,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=801, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:43:03,162 INFO L87 Difference]: Start difference. First operand 895 states and 2033 transitions. Second operand has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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) [2021-02-19 19:43:05,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:05,909 INFO L93 Difference]: Finished difference Result 2570 states and 5296 transitions. [2021-02-19 19:43:05,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-02-19 19:43:05,910 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:43:05,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:05,916 INFO L225 Difference]: With dead ends: 2570 [2021-02-19 19:43:05,916 INFO L226 Difference]: Without dead ends: 2546 [2021-02-19 19:43:05,917 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2814 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1214, Invalid=7906, Unknown=0, NotChecked=0, Total=9120 [2021-02-19 19:43:05,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2546 states. [2021-02-19 19:43:05,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2546 to 837. [2021-02-19 19:43:05,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 836 states have (on average 2.271531100478469) internal successors, (1899), 836 states have internal predecessors, (1899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:05,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1899 transitions. [2021-02-19 19:43:05,942 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1899 transitions. Word has length 39 [2021-02-19 19:43:05,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:05,943 INFO L480 AbstractCegarLoop]: Abstraction has 837 states and 1899 transitions. [2021-02-19 19:43:05,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 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) [2021-02-19 19:43:05,943 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1899 transitions. [2021-02-19 19:43:05,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:43:05,944 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:05,944 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:06,158 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 19:43:06,158 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:06,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:06,158 INFO L82 PathProgramCache]: Analyzing trace with hash -936825449, now seen corresponding path program 35 times [2021-02-19 19:43:06,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:06,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394511695] [2021-02-19 19:43:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:06,319 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:06,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394511695] [2021-02-19 19:43:06,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508362454] [2021-02-19 19:43:06,321 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:06,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 19:43:06,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:06,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 19:43:06,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:06,815 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 11 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:06,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:06,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18] total 29 [2021-02-19 19:43:06,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288364382] [2021-02-19 19:43:06,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 19:43:06,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:06,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 19:43:06,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:43:06,816 INFO L87 Difference]: Start difference. First operand 837 states and 1899 transitions. Second operand has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:08,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:08,846 INFO L93 Difference]: Finished difference Result 1954 states and 4095 transitions. [2021-02-19 19:43:08,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-02-19 19:43:08,847 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:43:08,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:08,850 INFO L225 Difference]: With dead ends: 1954 [2021-02-19 19:43:08,850 INFO L226 Difference]: Without dead ends: 1950 [2021-02-19 19:43:08,851 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2062 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=923, Invalid=6217, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 19:43:08,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1950 states. [2021-02-19 19:43:08,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1950 to 716. [2021-02-19 19:43:08,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.2545454545454544) internal successors, (1612), 715 states have internal predecessors, (1612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:08,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1612 transitions. [2021-02-19 19:43:08,866 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1612 transitions. Word has length 39 [2021-02-19 19:43:08,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:08,866 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1612 transitions. [2021-02-19 19:43:08,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:08,866 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1612 transitions. [2021-02-19 19:43:08,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:43:08,867 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:08,867 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:09,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:09,089 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:09,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:09,089 INFO L82 PathProgramCache]: Analyzing trace with hash -2145248271, now seen corresponding path program 36 times [2021-02-19 19:43:09,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:09,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825689258] [2021-02-19 19:43:09,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:09,250 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:09,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825689258] [2021-02-19 19:43:09,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417109291] [2021-02-19 19:43:09,250 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 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 [2021-02-19 19:43:09,279 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 19:43:09,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:09,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 19:43:09,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 2 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:09,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:09,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 31 [2021-02-19 19:43:09,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486077676] [2021-02-19 19:43:09,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 19:43:09,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:09,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 19:43:09,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:43:09,664 INFO L87 Difference]: Start difference. First operand 716 states and 1612 transitions. Second operand has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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) [2021-02-19 19:43:12,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:12,144 INFO L93 Difference]: Finished difference Result 3253 states and 6664 transitions. [2021-02-19 19:43:12,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 19:43:12,144 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:43:12,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:12,149 INFO L225 Difference]: With dead ends: 3253 [2021-02-19 19:43:12,149 INFO L226 Difference]: Without dead ends: 3205 [2021-02-19 19:43:12,150 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3598 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1716, Invalid=9204, Unknown=0, NotChecked=0, Total=10920 [2021-02-19 19:43:12,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3205 states. [2021-02-19 19:43:12,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3205 to 718. [2021-02-19 19:43:12,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 718 states, 717 states have (on average 2.2538354253835426) internal successors, (1616), 717 states have internal predecessors, (1616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:12,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 718 states to 718 states and 1616 transitions. [2021-02-19 19:43:12,168 INFO L78 Accepts]: Start accepts. Automaton has 718 states and 1616 transitions. Word has length 39 [2021-02-19 19:43:12,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:12,168 INFO L480 AbstractCegarLoop]: Abstraction has 718 states and 1616 transitions. [2021-02-19 19:43:12,168 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.28125) internal successors, (73), 31 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) [2021-02-19 19:43:12,168 INFO L276 IsEmpty]: Start isEmpty. Operand 718 states and 1616 transitions. [2021-02-19 19:43:12,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:43:12,170 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:12,170 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:12,390 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-02-19 19:43:12,390 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:12,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:12,390 INFO L82 PathProgramCache]: Analyzing trace with hash 368244597, now seen corresponding path program 37 times [2021-02-19 19:43:12,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:12,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661368281] [2021-02-19 19:43:12,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:12,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:12,551 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661368281] [2021-02-19 19:43:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562978972] [2021-02-19 19:43:12,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:12,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:12,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:43:12,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:12,957 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 6 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:12,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:12,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-02-19 19:43:12,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822579135] [2021-02-19 19:43:12,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 19:43:12,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:12,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 19:43:12,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:43:12,958 INFO L87 Difference]: Start difference. First operand 718 states and 1616 transitions. Second operand has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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) [2021-02-19 19:43:15,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:15,009 INFO L93 Difference]: Finished difference Result 4064 states and 8310 transitions. [2021-02-19 19:43:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-02-19 19:43:15,009 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:43:15,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:15,013 INFO L225 Difference]: With dead ends: 4064 [2021-02-19 19:43:15,013 INFO L226 Difference]: Without dead ends: 3938 [2021-02-19 19:43:15,013 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2889 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1522, Invalid=7220, Unknown=0, NotChecked=0, Total=8742 [2021-02-19 19:43:15,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3938 states. [2021-02-19 19:43:15,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3938 to 864. [2021-02-19 19:43:15,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 863 states have (on average 2.275782155272306) internal successors, (1964), 863 states have internal predecessors, (1964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:15,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1964 transitions. [2021-02-19 19:43:15,032 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1964 transitions. Word has length 39 [2021-02-19 19:43:15,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:15,032 INFO L480 AbstractCegarLoop]: Abstraction has 864 states and 1964 transitions. [2021-02-19 19:43:15,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 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) [2021-02-19 19:43:15,032 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1964 transitions. [2021-02-19 19:43:15,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:43:15,033 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:15,033 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:15,238 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 19:43:15,238 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:15,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:15,238 INFO L82 PathProgramCache]: Analyzing trace with hash 294518777, now seen corresponding path program 38 times [2021-02-19 19:43:15,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:15,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532543589] [2021-02-19 19:43:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:15,408 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:15,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532543589] [2021-02-19 19:43:15,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275087634] [2021-02-19 19:43:15,408 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:15,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:43:15,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:15,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:43:15,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:15,798 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:15,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:15,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-02-19 19:43:15,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157252642] [2021-02-19 19:43:15,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:43:15,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:15,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:43:15,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=1009, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:43:15,799 INFO L87 Difference]: Start difference. First operand 864 states and 1964 transitions. Second operand has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) [2021-02-19 19:43:17,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:17,952 INFO L93 Difference]: Finished difference Result 4076 states and 8364 transitions. [2021-02-19 19:43:17,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 19:43:17,953 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-02-19 19:43:17,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:17,955 INFO L225 Difference]: With dead ends: 4076 [2021-02-19 19:43:17,955 INFO L226 Difference]: Without dead ends: 3776 [2021-02-19 19:43:17,956 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3864 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=2308, Invalid=9248, Unknown=0, NotChecked=0, Total=11556 [2021-02-19 19:43:17,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3776 states. [2021-02-19 19:43:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3776 to 858. [2021-02-19 19:43:17,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 858 states, 857 states have (on average 2.2602100350058345) internal successors, (1937), 857 states have internal predecessors, (1937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:17,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 858 states to 858 states and 1937 transitions. [2021-02-19 19:43:17,970 INFO L78 Accepts]: Start accepts. Automaton has 858 states and 1937 transitions. Word has length 39 [2021-02-19 19:43:17,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:17,970 INFO L480 AbstractCegarLoop]: Abstraction has 858 states and 1937 transitions. [2021-02-19 19:43:17,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.085714285714286) internal successors, (73), 34 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) [2021-02-19 19:43:17,970 INFO L276 IsEmpty]: Start isEmpty. Operand 858 states and 1937 transitions. [2021-02-19 19:43:17,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-02-19 19:43:17,972 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:17,972 INFO L506 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:18,193 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:18,193 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:18,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:18,193 INFO L82 PathProgramCache]: Analyzing trace with hash -220522313, now seen corresponding path program 39 times [2021-02-19 19:43:18,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:18,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412955846] [2021-02-19 19:43:18,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:18,304 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:18,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412955846] [2021-02-19 19:43:18,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707309383] [2021-02-19 19:43:18,305 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:43:18,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-02-19 19:43:18,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:18,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:43:18,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:18,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 27 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:18,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:18,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 18] total 28 [2021-02-19 19:43:18,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598538202] [2021-02-19 19:43:18,724 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 19:43:18,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:18,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 19:43:18,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=661, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:43:18,725 INFO L87 Difference]: Start difference. First operand 858 states and 1937 transitions. Second operand has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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) [2021-02-19 19:43:21,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:21,304 INFO L93 Difference]: Finished difference Result 2927 states and 6237 transitions. [2021-02-19 19:43:21,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-02-19 19:43:21,304 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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 39 [2021-02-19 19:43:21,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:21,308 INFO L225 Difference]: With dead ends: 2927 [2021-02-19 19:43:21,308 INFO L226 Difference]: Without dead ends: 2923 [2021-02-19 19:43:21,308 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5275 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3131, Invalid=11149, Unknown=0, NotChecked=0, Total=14280 [2021-02-19 19:43:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2923 states. [2021-02-19 19:43:21,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2923 to 1133. [2021-02-19 19:43:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1133 states, 1132 states have (on average 2.325088339222615) internal successors, (2632), 1132 states have internal predecessors, (2632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1133 states to 1133 states and 2632 transitions. [2021-02-19 19:43:21,323 INFO L78 Accepts]: Start accepts. Automaton has 1133 states and 2632 transitions. Word has length 39 [2021-02-19 19:43:21,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:21,323 INFO L480 AbstractCegarLoop]: Abstraction has 1133 states and 2632 transitions. [2021-02-19 19:43:21,323 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.3793103448275863) internal successors, (69), 28 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) [2021-02-19 19:43:21,323 INFO L276 IsEmpty]: Start isEmpty. Operand 1133 states and 2632 transitions. [2021-02-19 19:43:21,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 19:43:21,325 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:21,325 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:21,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:21,525 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:21,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:21,526 INFO L82 PathProgramCache]: Analyzing trace with hash 2125216981, now seen corresponding path program 40 times [2021-02-19 19:43:21,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:21,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588406243] [2021-02-19 19:43:21,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:21,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:21,697 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:21,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588406243] [2021-02-19 19:43:21,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454495573] [2021-02-19 19:43:21,698 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:21,721 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:43:21,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:21,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-02-19 19:43:21,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:22,133 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 36 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:22,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:22,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 35 [2021-02-19 19:43:22,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557983922] [2021-02-19 19:43:22,133 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 19:43:22,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:22,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 19:43:22,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=1018, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:43:22,134 INFO L87 Difference]: Start difference. First operand 1133 states and 2632 transitions. Second operand has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 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) [2021-02-19 19:43:24,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:24,387 INFO L93 Difference]: Finished difference Result 2199 states and 4675 transitions. [2021-02-19 19:43:24,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 19:43:24,388 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 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 41 [2021-02-19 19:43:24,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:24,390 INFO L225 Difference]: With dead ends: 2199 [2021-02-19 19:43:24,390 INFO L226 Difference]: Without dead ends: 2049 [2021-02-19 19:43:24,391 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4141 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3335, Invalid=9547, Unknown=0, NotChecked=0, Total=12882 [2021-02-19 19:43:24,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2049 states. [2021-02-19 19:43:24,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2049 to 1138. [2021-02-19 19:43:24,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1138 states, 1137 states have (on average 2.3157431838170623) internal successors, (2633), 1137 states have internal predecessors, (2633), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:24,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1138 states to 1138 states and 2633 transitions. [2021-02-19 19:43:24,404 INFO L78 Accepts]: Start accepts. Automaton has 1138 states and 2633 transitions. Word has length 41 [2021-02-19 19:43:24,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:24,404 INFO L480 AbstractCegarLoop]: Abstraction has 1138 states and 2633 transitions. [2021-02-19 19:43:24,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.138888888888889) internal successors, (77), 35 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) [2021-02-19 19:43:24,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1138 states and 2633 transitions. [2021-02-19 19:43:24,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 19:43:24,406 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:24,406 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:24,627 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:24,627 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:24,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:24,628 INFO L82 PathProgramCache]: Analyzing trace with hash -153230949, now seen corresponding path program 41 times [2021-02-19 19:43:24,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:24,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252749706] [2021-02-19 19:43:24,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:24,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:24,739 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252749706] [2021-02-19 19:43:24,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983892019] [2021-02-19 19:43:24,739 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:24,773 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-02-19 19:43:24,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:24,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 19:43:24,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 43 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:25,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:25,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 19] total 28 [2021-02-19 19:43:25,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620134382] [2021-02-19 19:43:25,191 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 19:43:25,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:25,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 19:43:25,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2021-02-19 19:43:25,191 INFO L87 Difference]: Start difference. First operand 1138 states and 2633 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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) [2021-02-19 19:43:28,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:28,782 INFO L93 Difference]: Finished difference Result 1915 states and 4151 transitions. [2021-02-19 19:43:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-02-19 19:43:28,783 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 41 [2021-02-19 19:43:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:28,785 INFO L225 Difference]: With dead ends: 1915 [2021-02-19 19:43:28,785 INFO L226 Difference]: Without dead ends: 1911 [2021-02-19 19:43:28,786 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8672 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4990, Invalid=17062, Unknown=0, NotChecked=0, Total=22052 [2021-02-19 19:43:28,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1911 states. [2021-02-19 19:43:28,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1911 to 1114. [2021-02-19 19:43:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1114 states, 1113 states have (on average 2.321653189577718) internal successors, (2584), 1113 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:28,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1114 states to 1114 states and 2584 transitions. [2021-02-19 19:43:28,798 INFO L78 Accepts]: Start accepts. Automaton has 1114 states and 2584 transitions. Word has length 41 [2021-02-19 19:43:28,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:28,798 INFO L480 AbstractCegarLoop]: Abstraction has 1114 states and 2584 transitions. [2021-02-19 19:43:28,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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) [2021-02-19 19:43:28,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1114 states and 2584 transitions. [2021-02-19 19:43:28,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-02-19 19:43:28,799 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:28,800 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:29,000 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 19:43:29,000 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:29,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:29,000 INFO L82 PathProgramCache]: Analyzing trace with hash 18483883, now seen corresponding path program 42 times [2021-02-19 19:43:29,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:29,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624896514] [2021-02-19 19:43:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:29,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:29,115 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 59 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-02-19 19:43:29,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624896514] [2021-02-19 19:43:29,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276378642] [2021-02-19 19:43:29,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:29,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 19:43:29,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:29,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 28 conjunts are in the unsatisfiable core [2021-02-19 19:43:29,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:29,664 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 25 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:29,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:29,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 19] total 29 [2021-02-19 19:43:29,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376002808] [2021-02-19 19:43:29,665 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 19:43:29,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:29,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 19:43:29,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-02-19 19:43:29,666 INFO L87 Difference]: Start difference. First operand 1114 states and 2584 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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) [2021-02-19 19:43:32,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:32,048 INFO L93 Difference]: Finished difference Result 3697 states and 8046 transitions. [2021-02-19 19:43:32,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 19:43:32,049 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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 41 [2021-02-19 19:43:32,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:32,053 INFO L225 Difference]: With dead ends: 3697 [2021-02-19 19:43:32,053 INFO L226 Difference]: Without dead ends: 3697 [2021-02-19 19:43:32,054 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2941 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2386, Invalid=7316, Unknown=0, NotChecked=0, Total=9702 [2021-02-19 19:43:32,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3697 states. [2021-02-19 19:43:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3697 to 2061. [2021-02-19 19:43:32,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2061 states, 2060 states have (on average 2.3907766990291264) internal successors, (4925), 2060 states have internal predecessors, (4925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:32,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2061 states to 2061 states and 4925 transitions. [2021-02-19 19:43:32,086 INFO L78 Accepts]: Start accepts. Automaton has 2061 states and 4925 transitions. Word has length 41 [2021-02-19 19:43:32,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:32,086 INFO L480 AbstractCegarLoop]: Abstraction has 2061 states and 4925 transitions. [2021-02-19 19:43:32,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 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) [2021-02-19 19:43:32,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2061 states and 4925 transitions. [2021-02-19 19:43:32,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 19:43:32,089 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:32,089 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:32,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:32,310 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:32,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:32,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1301398995, now seen corresponding path program 43 times [2021-02-19 19:43:32,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:32,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794566759] [2021-02-19 19:43:32,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:32,425 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 1 proven. 97 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:32,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794566759] [2021-02-19 19:43:32,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2009228794] [2021-02-19 19:43:32,425 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:32,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:43:32,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:32,568 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:32,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:32,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 11 [2021-02-19 19:43:32,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943054932] [2021-02-19 19:43:32,569 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 19:43:32,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:32,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 19:43:32,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:43:32,570 INFO L87 Difference]: Start difference. First operand 2061 states and 4925 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) 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) [2021-02-19 19:43:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:32,683 INFO L93 Difference]: Finished difference Result 2922 states and 6927 transitions. [2021-02-19 19:43:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-02-19 19:43:32,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) 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 43 [2021-02-19 19:43:32,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:32,688 INFO L225 Difference]: With dead ends: 2922 [2021-02-19 19:43:32,688 INFO L226 Difference]: Without dead ends: 2865 [2021-02-19 19:43:32,688 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-02-19 19:43:32,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2865 states. [2021-02-19 19:43:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2865 to 2632. [2021-02-19 19:43:32,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2632 states, 2631 states have (on average 2.4401368301026225) internal successors, (6420), 2631 states have internal predecessors, (6420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2632 states to 2632 states and 6420 transitions. [2021-02-19 19:43:32,733 INFO L78 Accepts]: Start accepts. Automaton has 2632 states and 6420 transitions. Word has length 43 [2021-02-19 19:43:32,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:32,733 INFO L480 AbstractCegarLoop]: Abstraction has 2632 states and 6420 transitions. [2021-02-19 19:43:32,733 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) 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) [2021-02-19 19:43:32,733 INFO L276 IsEmpty]: Start isEmpty. Operand 2632 states and 6420 transitions. [2021-02-19 19:43:32,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 19:43:32,737 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:32,737 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:32,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:32,950 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash -339511767, now seen corresponding path program 44 times [2021-02-19 19:43:32,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:32,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599862972] [2021-02-19 19:43:32,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:33,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599862972] [2021-02-19 19:43:33,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1396737293] [2021-02-19 19:43:33,167 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:43:33,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:43:33,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:33,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-02-19 19:43:33,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:33,690 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:33,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:33,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 33 [2021-02-19 19:43:33,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997323429] [2021-02-19 19:43:33,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 19:43:33,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:33,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 19:43:33,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=978, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:43:33,694 INFO L87 Difference]: Start difference. First operand 2632 states and 6420 transitions. Second operand has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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) [2021-02-19 19:43:37,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:37,068 INFO L93 Difference]: Finished difference Result 5778 states and 12992 transitions. [2021-02-19 19:43:37,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-02-19 19:43:37,069 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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 43 [2021-02-19 19:43:37,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:37,075 INFO L225 Difference]: With dead ends: 5778 [2021-02-19 19:43:37,075 INFO L226 Difference]: Without dead ends: 5745 [2021-02-19 19:43:37,075 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3923 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1461, Invalid=10971, Unknown=0, NotChecked=0, Total=12432 [2021-02-19 19:43:37,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5745 states. [2021-02-19 19:43:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5745 to 2946. [2021-02-19 19:43:37,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 2.447198641765705) internal successors, (7207), 2945 states have internal predecessors, (7207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:37,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 7207 transitions. [2021-02-19 19:43:37,107 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 7207 transitions. Word has length 43 [2021-02-19 19:43:37,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:37,108 INFO L480 AbstractCegarLoop]: Abstraction has 2946 states and 7207 transitions. [2021-02-19 19:43:37,108 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.3823529411764706) internal successors, (81), 33 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) [2021-02-19 19:43:37,108 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 7207 transitions. [2021-02-19 19:43:37,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 19:43:37,110 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:37,110 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:37,310 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-02-19 19:43:37,311 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:37,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:37,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1069877677, now seen corresponding path program 45 times [2021-02-19 19:43:37,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:37,311 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495551424] [2021-02-19 19:43:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:37,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:37,496 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:37,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495551424] [2021-02-19 19:43:37,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1881560401] [2021-02-19 19:43:37,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:43:37,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 19:43:37,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:37,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-02-19 19:43:37,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:38,130 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 13 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:38,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:38,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 20] total 32 [2021-02-19 19:43:38,131 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817738771] [2021-02-19 19:43:38,131 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 19:43:38,131 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:38,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 19:43:38,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=912, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 19:43:38,132 INFO L87 Difference]: Start difference. First operand 2946 states and 7207 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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) [2021-02-19 19:43:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:41,031 INFO L93 Difference]: Finished difference Result 4729 states and 10915 transitions. [2021-02-19 19:43:41,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-02-19 19:43:41,032 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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 43 [2021-02-19 19:43:41,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:41,038 INFO L225 Difference]: With dead ends: 4729 [2021-02-19 19:43:41,038 INFO L226 Difference]: Without dead ends: 4725 [2021-02-19 19:43:41,039 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2728 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1085, Invalid=8227, Unknown=0, NotChecked=0, Total=9312 [2021-02-19 19:43:41,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4725 states. [2021-02-19 19:43:41,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4725 to 2852. [2021-02-19 19:43:41,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2852 states, 2851 states have (on average 2.4387934058225182) internal successors, (6953), 2851 states have internal predecessors, (6953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:41,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2852 states to 2852 states and 6953 transitions. [2021-02-19 19:43:41,069 INFO L78 Accepts]: Start accepts. Automaton has 2852 states and 6953 transitions. Word has length 43 [2021-02-19 19:43:41,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:41,070 INFO L480 AbstractCegarLoop]: Abstraction has 2852 states and 6953 transitions. [2021-02-19 19:43:41,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 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) [2021-02-19 19:43:41,070 INFO L276 IsEmpty]: Start isEmpty. Operand 2852 states and 6953 transitions. [2021-02-19 19:43:41,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 19:43:41,072 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:41,072 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:41,273 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:41,274 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:41,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:41,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1774881619, now seen corresponding path program 46 times [2021-02-19 19:43:41,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:41,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737447643] [2021-02-19 19:43:41,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:41,506 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:41,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737447643] [2021-02-19 19:43:41,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [734290776] [2021-02-19 19:43:41,507 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:43:41,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:43:41,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:41,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 40 conjunts are in the unsatisfiable core [2021-02-19 19:43:41,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:42,097 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 2 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:42,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:42,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 19] total 34 [2021-02-19 19:43:42,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477684476] [2021-02-19 19:43:42,098 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:43:42,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:42,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:43:42,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1035, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:43:42,099 INFO L87 Difference]: Start difference. First operand 2852 states and 6953 transitions. Second operand has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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) [2021-02-19 19:43:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:45,853 INFO L93 Difference]: Finished difference Result 7067 states and 15853 transitions. [2021-02-19 19:43:45,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-02-19 19:43:45,853 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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 43 [2021-02-19 19:43:45,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:45,859 INFO L225 Difference]: With dead ends: 7067 [2021-02-19 19:43:45,859 INFO L226 Difference]: Without dead ends: 7019 [2021-02-19 19:43:45,860 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5501 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2247, Invalid=14009, Unknown=0, NotChecked=0, Total=16256 [2021-02-19 19:43:45,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7019 states. [2021-02-19 19:43:45,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7019 to 2694. [2021-02-19 19:43:45,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2694 states, 2693 states have (on average 2.4496843668770887) internal successors, (6597), 2693 states have internal predecessors, (6597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:45,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2694 states to 2694 states and 6597 transitions. [2021-02-19 19:43:45,893 INFO L78 Accepts]: Start accepts. Automaton has 2694 states and 6597 transitions. Word has length 43 [2021-02-19 19:43:45,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:45,893 INFO L480 AbstractCegarLoop]: Abstraction has 2694 states and 6597 transitions. [2021-02-19 19:43:45,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 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) [2021-02-19 19:43:45,893 INFO L276 IsEmpty]: Start isEmpty. Operand 2694 states and 6597 transitions. [2021-02-19 19:43:45,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 19:43:45,896 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:45,896 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:46,100 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-02-19 19:43:46,101 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:46,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:46,101 INFO L82 PathProgramCache]: Analyzing trace with hash -807149519, now seen corresponding path program 47 times [2021-02-19 19:43:46,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:46,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847802787] [2021-02-19 19:43:46,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:46,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847802787] [2021-02-19 19:43:46,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108078640] [2021-02-19 19:43:46,299 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 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 [2021-02-19 19:43:46,338 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 19:43:46,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:46,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 19:43:46,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:46,776 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 6 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:46,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:46,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2021-02-19 19:43:46,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897520097] [2021-02-19 19:43:46,777 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:43:46,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:46,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:43:46,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=1153, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:43:46,777 INFO L87 Difference]: Start difference. First operand 2694 states and 6597 transitions. Second operand has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 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) [2021-02-19 19:43:49,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:49,758 INFO L93 Difference]: Finished difference Result 8504 states and 18894 transitions. [2021-02-19 19:43:49,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-02-19 19:43:49,758 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 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 43 [2021-02-19 19:43:49,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:49,766 INFO L225 Difference]: With dead ends: 8504 [2021-02-19 19:43:49,766 INFO L226 Difference]: Without dead ends: 8375 [2021-02-19 19:43:49,767 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5138 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2380, Invalid=12140, Unknown=0, NotChecked=0, Total=14520 [2021-02-19 19:43:49,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8375 states. [2021-02-19 19:43:49,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8375 to 2690. [2021-02-19 19:43:49,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2690 states, 2689 states have (on average 2.4503532911863144) internal successors, (6589), 2689 states have internal predecessors, (6589), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:49,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2690 states to 2690 states and 6589 transitions. [2021-02-19 19:43:49,805 INFO L78 Accepts]: Start accepts. Automaton has 2690 states and 6589 transitions. Word has length 43 [2021-02-19 19:43:49,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:49,805 INFO L480 AbstractCegarLoop]: Abstraction has 2690 states and 6589 transitions. [2021-02-19 19:43:49,805 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.189189189189189) internal successors, (81), 36 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) [2021-02-19 19:43:49,805 INFO L276 IsEmpty]: Start isEmpty. Operand 2690 states and 6589 transitions. [2021-02-19 19:43:49,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 19:43:49,807 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:49,807 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:50,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:50,008 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:50,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:50,008 INFO L82 PathProgramCache]: Analyzing trace with hash -298288971, now seen corresponding path program 48 times [2021-02-19 19:43:50,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:50,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655326944] [2021-02-19 19:43:50,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:50,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:50,213 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:50,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655326944] [2021-02-19 19:43:50,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71522035] [2021-02-19 19:43:50,214 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:50,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-02-19 19:43:50,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:50,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 19:43:50,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:50,751 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 12 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:50,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:50,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20] total 37 [2021-02-19 19:43:50,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046399950] [2021-02-19 19:43:50,752 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 19:43:50,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:50,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 19:43:50,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:43:50,753 INFO L87 Difference]: Start difference. First operand 2690 states and 6589 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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) [2021-02-19 19:43:53,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:53,646 INFO L93 Difference]: Finished difference Result 9110 states and 20113 transitions. [2021-02-19 19:43:53,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-02-19 19:43:53,647 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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 43 [2021-02-19 19:43:53,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:53,655 INFO L225 Difference]: With dead ends: 9110 [2021-02-19 19:43:53,655 INFO L226 Difference]: Without dead ends: 8906 [2021-02-19 19:43:53,656 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5558 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2778, Invalid=12474, Unknown=0, NotChecked=0, Total=15252 [2021-02-19 19:43:53,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8906 states. [2021-02-19 19:43:53,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8906 to 2710. [2021-02-19 19:43:53,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2710 states, 2709 states have (on average 2.44702842377261) internal successors, (6629), 2709 states have internal predecessors, (6629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:53,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2710 states to 2710 states and 6629 transitions. [2021-02-19 19:43:53,700 INFO L78 Accepts]: Start accepts. Automaton has 2710 states and 6629 transitions. Word has length 43 [2021-02-19 19:43:53,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:53,700 INFO L480 AbstractCegarLoop]: Abstraction has 2710 states and 6629 transitions. [2021-02-19 19:43:53,700 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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) [2021-02-19 19:43:53,700 INFO L276 IsEmpty]: Start isEmpty. Operand 2710 states and 6629 transitions. [2021-02-19 19:43:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 19:43:53,703 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:53,703 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:53,916 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-02-19 19:43:53,916 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:53,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:53,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1028850119, now seen corresponding path program 49 times [2021-02-19 19:43:53,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:53,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477230898] [2021-02-19 19:43:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:53,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:54,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477230898] [2021-02-19 19:43:54,124 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901616943] [2021-02-19 19:43:54,124 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:54,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:43:54,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:43:54,647 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 20 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:54,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:54,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19] total 37 [2021-02-19 19:43:54,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565668979] [2021-02-19 19:43:54,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 19:43:54,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:54,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 19:43:54,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=1200, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:43:54,648 INFO L87 Difference]: Start difference. First operand 2710 states and 6629 transitions. Second operand has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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) [2021-02-19 19:43:57,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:43:57,227 INFO L93 Difference]: Finished difference Result 9783 states and 22057 transitions. [2021-02-19 19:43:57,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-02-19 19:43:57,228 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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 43 [2021-02-19 19:43:57,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:43:57,238 INFO L225 Difference]: With dead ends: 9783 [2021-02-19 19:43:57,238 INFO L226 Difference]: Without dead ends: 9369 [2021-02-19 19:43:57,239 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4465 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2685, Invalid=11121, Unknown=0, NotChecked=0, Total=13806 [2021-02-19 19:43:57,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9369 states. [2021-02-19 19:43:57,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9369 to 2859. [2021-02-19 19:43:57,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2859 states, 2858 states have (on average 2.368439468159552) internal successors, (6769), 2858 states have internal predecessors, (6769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:43:57,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2859 states to 2859 states and 6769 transitions. [2021-02-19 19:43:57,326 INFO L78 Accepts]: Start accepts. Automaton has 2859 states and 6769 transitions. Word has length 43 [2021-02-19 19:43:57,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:43:57,326 INFO L480 AbstractCegarLoop]: Abstraction has 2859 states and 6769 transitions. [2021-02-19 19:43:57,326 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.1315789473684212) internal successors, (81), 37 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) [2021-02-19 19:43:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 2859 states and 6769 transitions. [2021-02-19 19:43:57,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-02-19 19:43:57,329 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:43:57,329 INFO L506 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:43:57,529 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:57,529 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:43:57,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:43:57,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1679525317, now seen corresponding path program 50 times [2021-02-19 19:43:57,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:43:57,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665643468] [2021-02-19 19:43:57,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:43:57,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:43:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:57,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665643468] [2021-02-19 19:43:57,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914447159] [2021-02-19 19:43:57,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:43:57,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:43:57,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:43:57,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 19:43:57,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:43:58,175 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 38 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:43:58,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:43:58,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 20] total 31 [2021-02-19 19:43:58,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93605972] [2021-02-19 19:43:58,176 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 19:43:58,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:43:58,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 19:43:58,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-02-19 19:43:58,176 INFO L87 Difference]: Start difference. First operand 2859 states and 6769 transitions. Second operand has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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) [2021-02-19 19:44:01,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:01,978 INFO L93 Difference]: Finished difference Result 6829 states and 15444 transitions. [2021-02-19 19:44:01,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-02-19 19:44:01,979 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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 43 [2021-02-19 19:44:01,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:01,986 INFO L225 Difference]: With dead ends: 6829 [2021-02-19 19:44:01,986 INFO L226 Difference]: Without dead ends: 6825 [2021-02-19 19:44:01,987 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9023 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4987, Invalid=17965, Unknown=0, NotChecked=0, Total=22952 [2021-02-19 19:44:01,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6825 states. [2021-02-19 19:44:02,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6825 to 2962. [2021-02-19 19:44:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 2.403579871664978) internal successors, (7117), 2961 states have internal predecessors, (7117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:02,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 7117 transitions. [2021-02-19 19:44:02,038 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 7117 transitions. Word has length 43 [2021-02-19 19:44:02,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:02,038 INFO L480 AbstractCegarLoop]: Abstraction has 2962 states and 7117 transitions. [2021-02-19 19:44:02,038 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.40625) internal successors, (77), 31 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) [2021-02-19 19:44:02,038 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 7117 transitions. [2021-02-19 19:44:02,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 19:44:02,042 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:02,042 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:02,257 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:02,257 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:02,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:02,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1638048751, now seen corresponding path program 51 times [2021-02-19 19:44:02,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:02,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323952115] [2021-02-19 19:44:02,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:02,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:02,453 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:02,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323952115] [2021-02-19 19:44:02,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866584336] [2021-02-19 19:44:02,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:02,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-02-19 19:44:02,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:02,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 19:44:02,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:03,028 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 49 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:03,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:03,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21] total 39 [2021-02-19 19:44:03,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324272389] [2021-02-19 19:44:03,028 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-02-19 19:44:03,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:03,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-02-19 19:44:03,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=294, Invalid=1266, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:44:03,029 INFO L87 Difference]: Start difference. First operand 2962 states and 7117 transitions. Second operand has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2021-02-19 19:44:06,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:06,016 INFO L93 Difference]: Finished difference Result 4709 states and 10625 transitions. [2021-02-19 19:44:06,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-02-19 19:44:06,017 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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 45 [2021-02-19 19:44:06,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:06,020 INFO L225 Difference]: With dead ends: 4709 [2021-02-19 19:44:06,021 INFO L226 Difference]: Without dead ends: 4427 [2021-02-19 19:44:06,021 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6158 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4840, Invalid=13792, Unknown=0, NotChecked=0, Total=18632 [2021-02-19 19:44:06,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4427 states. [2021-02-19 19:44:06,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4427 to 2849. [2021-02-19 19:44:06,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.392205056179775) internal successors, (6813), 2848 states have internal predecessors, (6813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:06,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 6813 transitions. [2021-02-19 19:44:06,048 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 6813 transitions. Word has length 45 [2021-02-19 19:44:06,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:06,048 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 6813 transitions. [2021-02-19 19:44:06,049 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.125) internal successors, (85), 39 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) [2021-02-19 19:44:06,049 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 6813 transitions. [2021-02-19 19:44:06,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-02-19 19:44:06,052 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:06,052 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:06,265 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:06,266 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash 291501083, now seen corresponding path program 52 times [2021-02-19 19:44:06,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:06,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822141884] [2021-02-19 19:44:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:06,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822141884] [2021-02-19 19:44:06,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016438760] [2021-02-19 19:44:06,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:06,426 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:44:06,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:06,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 33 conjunts are in the unsatisfiable core [2021-02-19 19:44:06,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:06,987 INFO L134 CoverageAnalysis]: Checked inductivity of 113 backedges. 57 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:06,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:06,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 20] total 30 [2021-02-19 19:44:06,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620886050] [2021-02-19 19:44:06,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 19:44:06,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:06,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 19:44:06,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=726, Unknown=0, NotChecked=0, Total=930 [2021-02-19 19:44:06,988 INFO L87 Difference]: Start difference. First operand 2849 states and 6813 transitions. Second operand has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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) [2021-02-19 19:44:09,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:09,852 INFO L93 Difference]: Finished difference Result 3679 states and 8433 transitions. [2021-02-19 19:44:09,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-02-19 19:44:09,853 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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 45 [2021-02-19 19:44:09,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:09,856 INFO L225 Difference]: With dead ends: 3679 [2021-02-19 19:44:09,856 INFO L226 Difference]: Without dead ends: 3675 [2021-02-19 19:44:09,857 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5874 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=3813, Invalid=12443, Unknown=0, NotChecked=0, Total=16256 [2021-02-19 19:44:09,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3675 states. [2021-02-19 19:44:09,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3675 to 2849. [2021-02-19 19:44:09,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 2.3918539325842696) internal successors, (6812), 2848 states have internal predecessors, (6812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:09,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 6812 transitions. [2021-02-19 19:44:09,881 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 6812 transitions. Word has length 45 [2021-02-19 19:44:09,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:09,882 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 6812 transitions. [2021-02-19 19:44:09,882 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.6129032258064515) internal successors, (81), 30 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) [2021-02-19 19:44:09,882 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 6812 transitions. [2021-02-19 19:44:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 19:44:09,884 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:09,884 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:10,085 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:10,086 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:10,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:10,086 INFO L82 PathProgramCache]: Analyzing trace with hash 1165493775, now seen corresponding path program 53 times [2021-02-19 19:44:10,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:10,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298666891] [2021-02-19 19:44:10,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:10,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:10,213 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 1 proven. 127 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:10,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298666891] [2021-02-19 19:44:10,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453516411] [2021-02-19 19:44:10,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:10,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-02-19 19:44:10,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:10,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 19:44:10,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:10,365 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:10,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 12 [2021-02-19 19:44:10,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168377368] [2021-02-19 19:44:10,366 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-02-19 19:44:10,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:10,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-02-19 19:44:10,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:44:10,366 INFO L87 Difference]: Start difference. First operand 2849 states and 6812 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) 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) [2021-02-19 19:44:10,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:10,483 INFO L93 Difference]: Finished difference Result 3813 states and 9018 transitions. [2021-02-19 19:44:10,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-02-19 19:44:10,483 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) 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 47 [2021-02-19 19:44:10,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:10,486 INFO L225 Difference]: With dead ends: 3813 [2021-02-19 19:44:10,486 INFO L226 Difference]: Without dead ends: 3750 [2021-02-19 19:44:10,486 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-02-19 19:44:10,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3750 states. [2021-02-19 19:44:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3750 to 3429. [2021-02-19 19:44:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 2.430571761960327) internal successors, (8332), 3428 states have internal predecessors, (8332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:10,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 8332 transitions. [2021-02-19 19:44:10,517 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 8332 transitions. Word has length 47 [2021-02-19 19:44:10,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:10,517 INFO L480 AbstractCegarLoop]: Abstraction has 3429 states and 8332 transitions. [2021-02-19 19:44:10,517 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) 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) [2021-02-19 19:44:10,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 8332 transitions. [2021-02-19 19:44:10,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 19:44:10,520 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:10,520 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:10,721 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-02-19 19:44:10,721 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1302073185, now seen corresponding path program 54 times [2021-02-19 19:44:10,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:10,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149537660] [2021-02-19 19:44:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:11,104 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:11,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149537660] [2021-02-19 19:44:11,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526707301] [2021-02-19 19:44:11,105 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:11,137 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-02-19 19:44:11,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:11,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 31 conjunts are in the unsatisfiable core [2021-02-19 19:44:11,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:11,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:11,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 34 [2021-02-19 19:44:11,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895976500] [2021-02-19 19:44:11,466 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 19:44:11,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:11,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 19:44:11,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=998, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:44:11,466 INFO L87 Difference]: Start difference. First operand 3429 states and 8332 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 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) [2021-02-19 19:44:12,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:12,613 INFO L93 Difference]: Finished difference Result 4327 states and 10075 transitions. [2021-02-19 19:44:12,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 19:44:12,614 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 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 47 [2021-02-19 19:44:12,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:12,619 INFO L225 Difference]: With dead ends: 4327 [2021-02-19 19:44:12,619 INFO L226 Difference]: Without dead ends: 4324 [2021-02-19 19:44:12,619 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 716 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=403, Invalid=3137, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 19:44:12,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-02-19 19:44:12,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3396. [2021-02-19 19:44:12,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3396 states, 3395 states have (on average 2.422680412371134) internal successors, (8225), 3395 states have internal predecessors, (8225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:12,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3396 states to 3396 states and 8225 transitions. [2021-02-19 19:44:12,652 INFO L78 Accepts]: Start accepts. Automaton has 3396 states and 8225 transitions. Word has length 47 [2021-02-19 19:44:12,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:12,652 INFO L480 AbstractCegarLoop]: Abstraction has 3396 states and 8225 transitions. [2021-02-19 19:44:12,652 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 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) [2021-02-19 19:44:12,652 INFO L276 IsEmpty]: Start isEmpty. Operand 3396 states and 8225 transitions. [2021-02-19 19:44:12,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 19:44:12,655 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:12,655 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:12,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-02-19 19:44:12,861 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:12,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:12,861 INFO L82 PathProgramCache]: Analyzing trace with hash -601034523, now seen corresponding path program 55 times [2021-02-19 19:44:12,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:12,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721816682] [2021-02-19 19:44:12,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:12,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:13,101 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721816682] [2021-02-19 19:44:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676000392] [2021-02-19 19:44:13,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:13,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:13,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:44:13,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:13,783 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 0 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:13,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:13,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 21] total 36 [2021-02-19 19:44:13,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504395023] [2021-02-19 19:44:13,784 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:44:13,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:13,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:44:13,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:44:13,784 INFO L87 Difference]: Start difference. First operand 3396 states and 8225 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:18,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:18,265 INFO L93 Difference]: Finished difference Result 7270 states and 16363 transitions. [2021-02-19 19:44:18,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-02-19 19:44:18,265 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:44:18,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:18,272 INFO L225 Difference]: With dead ends: 7270 [2021-02-19 19:44:18,272 INFO L226 Difference]: Without dead ends: 7246 [2021-02-19 19:44:18,272 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5227 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1708, Invalid=14548, Unknown=0, NotChecked=0, Total=16256 [2021-02-19 19:44:18,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7246 states. [2021-02-19 19:44:18,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7246 to 3694. [2021-02-19 19:44:18,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3694 states, 3693 states have (on average 2.428919577579204) internal successors, (8970), 3693 states have internal predecessors, (8970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:18,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3694 states to 3694 states and 8970 transitions. [2021-02-19 19:44:18,315 INFO L78 Accepts]: Start accepts. Automaton has 3694 states and 8970 transitions. Word has length 47 [2021-02-19 19:44:18,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:18,315 INFO L480 AbstractCegarLoop]: Abstraction has 3694 states and 8970 transitions. [2021-02-19 19:44:18,315 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:18,315 INFO L276 IsEmpty]: Start isEmpty. Operand 3694 states and 8970 transitions. [2021-02-19 19:44:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 19:44:18,318 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:18,318 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:18,523 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-02-19 19:44:18,524 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:18,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:18,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1331400433, now seen corresponding path program 56 times [2021-02-19 19:44:18,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:18,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58535602] [2021-02-19 19:44:18,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:18,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:18,735 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:18,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58535602] [2021-02-19 19:44:18,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912066375] [2021-02-19 19:44:18,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:44:18,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:44:18,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:18,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 19:44:18,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:19,447 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 15 proven. 113 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:19,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:19,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22] total 35 [2021-02-19 19:44:19,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550399106] [2021-02-19 19:44:19,448 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 19:44:19,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:19,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 19:44:19,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 19:44:19,449 INFO L87 Difference]: Start difference. First operand 3694 states and 8970 transitions. Second operand has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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) [2021-02-19 19:44:23,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:23,353 INFO L93 Difference]: Finished difference Result 5745 states and 13237 transitions. [2021-02-19 19:44:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-02-19 19:44:23,354 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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 [2021-02-19 19:44:23,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:23,359 INFO L225 Difference]: With dead ends: 5745 [2021-02-19 19:44:23,359 INFO L226 Difference]: Without dead ends: 5741 [2021-02-19 19:44:23,359 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3493 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1247, Invalid=10525, Unknown=0, NotChecked=0, Total=11772 [2021-02-19 19:44:23,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5741 states. [2021-02-19 19:44:23,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5741 to 3440. [2021-02-19 19:44:23,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3440 states, 3439 states have (on average 2.4286129688863043) internal successors, (8352), 3439 states have internal predecessors, (8352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:23,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3440 states to 3440 states and 8352 transitions. [2021-02-19 19:44:23,394 INFO L78 Accepts]: Start accepts. Automaton has 3440 states and 8352 transitions. Word has length 47 [2021-02-19 19:44:23,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:23,394 INFO L480 AbstractCegarLoop]: Abstraction has 3440 states and 8352 transitions. [2021-02-19 19:44:23,394 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 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) [2021-02-19 19:44:23,394 INFO L276 IsEmpty]: Start isEmpty. Operand 3440 states and 8352 transitions. [2021-02-19 19:44:23,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 19:44:23,397 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:23,397 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:23,597 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:23,597 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:23,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:23,598 INFO L82 PathProgramCache]: Analyzing trace with hash 712802153, now seen corresponding path program 57 times [2021-02-19 19:44:23,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:23,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641029370] [2021-02-19 19:44:23,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:23,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641029370] [2021-02-19 19:44:23,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342551063] [2021-02-19 19:44:23,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:23,885 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-02-19 19:44:23,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:23,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:44:23,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:24,499 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 2 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:24,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:24,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21] total 37 [2021-02-19 19:44:24,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239977460] [2021-02-19 19:44:24,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 19:44:24,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:24,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 19:44:24,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1235, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:44:24,500 INFO L87 Difference]: Start difference. First operand 3440 states and 8352 transitions. Second operand has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:30,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:30,020 INFO L93 Difference]: Finished difference Result 8740 states and 19553 transitions. [2021-02-19 19:44:30,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-02-19 19:44:30,021 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:44:30,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:30,029 INFO L225 Difference]: With dead ends: 8740 [2021-02-19 19:44:30,029 INFO L226 Difference]: Without dead ends: 8692 [2021-02-19 19:44:30,030 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7835 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2779, Invalid=19871, Unknown=0, NotChecked=0, Total=22650 [2021-02-19 19:44:30,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8692 states. [2021-02-19 19:44:30,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8692 to 3420. [2021-02-19 19:44:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3420 states, 3419 states have (on average 2.428780345130155) internal successors, (8304), 3419 states have internal predecessors, (8304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:30,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3420 states to 3420 states and 8304 transitions. [2021-02-19 19:44:30,073 INFO L78 Accepts]: Start accepts. Automaton has 3420 states and 8304 transitions. Word has length 47 [2021-02-19 19:44:30,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:30,073 INFO L480 AbstractCegarLoop]: Abstraction has 3420 states and 8304 transitions. [2021-02-19 19:44:30,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:30,073 INFO L276 IsEmpty]: Start isEmpty. Operand 3420 states and 8304 transitions. [2021-02-19 19:44:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 19:44:30,076 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:30,076 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:30,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:30,278 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:30,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:30,278 INFO L82 PathProgramCache]: Analyzing trace with hash -2031846675, now seen corresponding path program 58 times [2021-02-19 19:44:30,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:30,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915579731] [2021-02-19 19:44:30,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:30,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:30,542 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:30,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915579731] [2021-02-19 19:44:30,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924341440] [2021-02-19 19:44:30,543 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 19:44:30,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:44:30,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:30,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:44:30,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 6 proven. 122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:31,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:31,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2021-02-19 19:44:31,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252737444] [2021-02-19 19:44:31,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:44:31,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:31,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:44:31,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:44:31,208 INFO L87 Difference]: Start difference. First operand 3420 states and 8304 transitions. Second operand has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:36,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:36,575 INFO L93 Difference]: Finished difference Result 10637 states and 23630 transitions. [2021-02-19 19:44:36,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-02-19 19:44:36,576 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:44:36,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:36,586 INFO L225 Difference]: With dead ends: 10637 [2021-02-19 19:44:36,586 INFO L226 Difference]: Without dead ends: 10559 [2021-02-19 19:44:36,588 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8014 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=3216, Invalid=19434, Unknown=0, NotChecked=0, Total=22650 [2021-02-19 19:44:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10559 states. [2021-02-19 19:44:36,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10559 to 3388. [2021-02-19 19:44:36,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3388 states, 3387 states have (on average 2.4328314142308827) internal successors, (8240), 3387 states have internal predecessors, (8240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3388 states to 3388 states and 8240 transitions. [2021-02-19 19:44:36,657 INFO L78 Accepts]: Start accepts. Automaton has 3388 states and 8240 transitions. Word has length 47 [2021-02-19 19:44:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:36,657 INFO L480 AbstractCegarLoop]: Abstraction has 3388 states and 8240 transitions. [2021-02-19 19:44:36,657 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 3388 states and 8240 transitions. [2021-02-19 19:44:36,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 19:44:36,660 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:36,660 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:36,860 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-02-19 19:44:36,860 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:36,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:36,861 INFO L82 PathProgramCache]: Analyzing trace with hash -3234959, now seen corresponding path program 59 times [2021-02-19 19:44:36,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:36,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762100942] [2021-02-19 19:44:36,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:37,077 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:37,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762100942] [2021-02-19 19:44:37,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175639826] [2021-02-19 19:44:37,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:37,104 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-02-19 19:44:37,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:37,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:44:37,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 12 proven. 116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:37,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:37,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 22] total 40 [2021-02-19 19:44:37,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675343329] [2021-02-19 19:44:37,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:44:37,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:44:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=1426, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:44:37,669 INFO L87 Difference]: Start difference. First operand 3388 states and 8240 transitions. Second operand has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:41,290 INFO L93 Difference]: Finished difference Result 12029 states and 26608 transitions. [2021-02-19 19:44:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-02-19 19:44:41,291 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:44:41,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:41,303 INFO L225 Difference]: With dead ends: 12029 [2021-02-19 19:44:41,304 INFO L226 Difference]: Without dead ends: 11861 [2021-02-19 19:44:41,305 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6478 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=2941, Invalid=14881, Unknown=0, NotChecked=0, Total=17822 [2021-02-19 19:44:41,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11861 states. [2021-02-19 19:44:41,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11861 to 3416. [2021-02-19 19:44:41,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3416 states, 3415 states have (on average 2.4292825768667643) internal successors, (8296), 3415 states have internal predecessors, (8296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:41,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3416 states to 3416 states and 8296 transitions. [2021-02-19 19:44:41,359 INFO L78 Accepts]: Start accepts. Automaton has 3416 states and 8296 transitions. Word has length 47 [2021-02-19 19:44:41,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:41,359 INFO L480 AbstractCegarLoop]: Abstraction has 3416 states and 8296 transitions. [2021-02-19 19:44:41,359 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1707317073170733) internal successors, (89), 40 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:41,360 INFO L276 IsEmpty]: Start isEmpty. Operand 3416 states and 8296 transitions. [2021-02-19 19:44:41,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 19:44:41,362 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:41,362 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:41,562 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:41,562 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:41,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:41,562 INFO L82 PathProgramCache]: Analyzing trace with hash -541804299, now seen corresponding path program 60 times [2021-02-19 19:44:41,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:41,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164968321] [2021-02-19 19:44:41,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:41,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:41,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164968321] [2021-02-19 19:44:41,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869845542] [2021-02-19 19:44:41,787 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 [2021-02-19 19:44:41,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-02-19 19:44:41,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:41,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:44:41,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:42,460 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 20 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:42,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:42,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 41 [2021-02-19 19:44:42,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724567078] [2021-02-19 19:44:42,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:44:42,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:42,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:44:42,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1485, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:44:42,462 INFO L87 Difference]: Start difference. First operand 3416 states and 8296 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:46,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:46,494 INFO L93 Difference]: Finished difference Result 12153 states and 26725 transitions. [2021-02-19 19:44:46,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-02-19 19:44:46,495 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:44:46,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:46,508 INFO L225 Difference]: With dead ends: 12153 [2021-02-19 19:44:46,508 INFO L226 Difference]: Without dead ends: 11850 [2021-02-19 19:44:46,509 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8350 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4138, Invalid=18212, Unknown=0, NotChecked=0, Total=22350 [2021-02-19 19:44:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11850 states. [2021-02-19 19:44:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11850 to 3436. [2021-02-19 19:44:46,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3436 states, 3435 states have (on average 2.426783114992722) internal successors, (8336), 3435 states have internal predecessors, (8336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:46,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3436 states to 3436 states and 8336 transitions. [2021-02-19 19:44:46,563 INFO L78 Accepts]: Start accepts. Automaton has 3436 states and 8336 transitions. Word has length 47 [2021-02-19 19:44:46,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:46,564 INFO L480 AbstractCegarLoop]: Abstraction has 3436 states and 8336 transitions. [2021-02-19 19:44:46,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:46,564 INFO L276 IsEmpty]: Start isEmpty. Operand 3436 states and 8336 transitions. [2021-02-19 19:44:46,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 19:44:46,566 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:46,566 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:46,770 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:46,770 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:46,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:46,770 INFO L82 PathProgramCache]: Analyzing trace with hash 689994617, now seen corresponding path program 61 times [2021-02-19 19:44:46,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:46,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162461364] [2021-02-19 19:44:46,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:46,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:47,015 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:47,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162461364] [2021-02-19 19:44:47,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626397988] [2021-02-19 19:44:47,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:47,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 19:44:47,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:47,656 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 30 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:47,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:47,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 41 [2021-02-19 19:44:47,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484660593] [2021-02-19 19:44:47,656 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:44:47,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:47,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:44:47,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1473, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:44:47,657 INFO L87 Difference]: Start difference. First operand 3436 states and 8336 transitions. Second operand has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:51,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:51,289 INFO L93 Difference]: Finished difference Result 12452 states and 28026 transitions. [2021-02-19 19:44:51,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-02-19 19:44:51,290 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:44:51,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:51,302 INFO L225 Difference]: With dead ends: 12452 [2021-02-19 19:44:51,302 INFO L226 Difference]: Without dead ends: 11933 [2021-02-19 19:44:51,303 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6615 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=3920, Invalid=15820, Unknown=0, NotChecked=0, Total=19740 [2021-02-19 19:44:51,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11933 states. [2021-02-19 19:44:51,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11933 to 2957. [2021-02-19 19:44:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2957 states, 2956 states have (on average 2.3687415426251692) internal successors, (7002), 2956 states have internal predecessors, (7002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:51,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2957 states to 2957 states and 7002 transitions. [2021-02-19 19:44:51,353 INFO L78 Accepts]: Start accepts. Automaton has 2957 states and 7002 transitions. Word has length 47 [2021-02-19 19:44:51,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:51,353 INFO L480 AbstractCegarLoop]: Abstraction has 2957 states and 7002 transitions. [2021-02-19 19:44:51,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.119047619047619) internal successors, (89), 41 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:51,353 INFO L276 IsEmpty]: Start isEmpty. Operand 2957 states and 7002 transitions. [2021-02-19 19:44:51,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-02-19 19:44:51,355 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:51,355 INFO L506 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:51,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:51,556 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:51,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:51,556 INFO L82 PathProgramCache]: Analyzing trace with hash -146826817, now seen corresponding path program 62 times [2021-02-19 19:44:51,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:51,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506679773] [2021-02-19 19:44:51,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:51,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:51,714 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:51,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506679773] [2021-02-19 19:44:51,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522171571] [2021-02-19 19:44:51,715 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:51,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:44:51,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:51,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 19:44:51,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 128 backedges. 51 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:52,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:52,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 22] total 34 [2021-02-19 19:44:52,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906597001] [2021-02-19 19:44:52,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-02-19 19:44:52,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:52,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-02-19 19:44:52,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=978, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 19:44:52,336 INFO L87 Difference]: Start difference. First operand 2957 states and 7002 transitions. Second operand has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 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) [2021-02-19 19:44:57,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:44:57,995 INFO L93 Difference]: Finished difference Result 6600 states and 14572 transitions. [2021-02-19 19:44:57,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-02-19 19:44:57,996 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 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 [2021-02-19 19:44:57,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:44:58,003 INFO L225 Difference]: With dead ends: 6600 [2021-02-19 19:44:58,003 INFO L226 Difference]: Without dead ends: 6596 [2021-02-19 19:44:58,005 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14541 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=7575, Invalid=27581, Unknown=0, NotChecked=0, Total=35156 [2021-02-19 19:44:58,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6596 states. [2021-02-19 19:44:58,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6596 to 3022. [2021-02-19 19:44:58,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3022 states, 3021 states have (on average 2.386957960940086) internal successors, (7211), 3021 states have internal predecessors, (7211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:44:58,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3022 states to 3022 states and 7211 transitions. [2021-02-19 19:44:58,041 INFO L78 Accepts]: Start accepts. Automaton has 3022 states and 7211 transitions. Word has length 47 [2021-02-19 19:44:58,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:44:58,041 INFO L480 AbstractCegarLoop]: Abstraction has 3022 states and 7211 transitions. [2021-02-19 19:44:58,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4285714285714284) internal successors, (85), 34 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) [2021-02-19 19:44:58,041 INFO L276 IsEmpty]: Start isEmpty. Operand 3022 states and 7211 transitions. [2021-02-19 19:44:58,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-19 19:44:58,044 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:44:58,044 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:44:58,244 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:58,245 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:44:58,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:44:58,245 INFO L82 PathProgramCache]: Analyzing trace with hash 2113031501, now seen corresponding path program 63 times [2021-02-19 19:44:58,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:44:58,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214320665] [2021-02-19 19:44:58,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:44:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:44:58,509 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:58,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214320665] [2021-02-19 19:44:58,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614444942] [2021-02-19 19:44:58,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:44:58,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-02-19 19:44:58,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:44:58,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 40 conjunts are in the unsatisfiable core [2021-02-19 19:44:58,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:44:59,229 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 64 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:44:59,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:44:59,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 43 [2021-02-19 19:44:59,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924332012] [2021-02-19 19:44:59,229 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-02-19 19:44:59,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:44:59,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-02-19 19:44:59,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1541, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:44:59,230 INFO L87 Difference]: Start difference. First operand 3022 states and 7211 transitions. Second operand has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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) [2021-02-19 19:45:03,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:03,584 INFO L93 Difference]: Finished difference Result 4634 states and 10318 transitions. [2021-02-19 19:45:03,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-02-19 19:45:03,584 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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 49 [2021-02-19 19:45:03,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:03,589 INFO L225 Difference]: With dead ends: 4634 [2021-02-19 19:45:03,589 INFO L226 Difference]: Without dead ends: 4382 [2021-02-19 19:45:03,591 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9327 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=6810, Invalid=19272, Unknown=0, NotChecked=0, Total=26082 [2021-02-19 19:45:03,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-02-19 19:45:03,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 3023. [2021-02-19 19:45:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3023 states, 3022 states have (on average 2.382528127068167) internal successors, (7200), 3022 states have internal predecessors, (7200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:03,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3023 states to 3023 states and 7200 transitions. [2021-02-19 19:45:03,620 INFO L78 Accepts]: Start accepts. Automaton has 3023 states and 7200 transitions. Word has length 49 [2021-02-19 19:45:03,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:03,620 INFO L480 AbstractCegarLoop]: Abstraction has 3023 states and 7200 transitions. [2021-02-19 19:45:03,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.1136363636363638) internal successors, (93), 43 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) [2021-02-19 19:45:03,620 INFO L276 IsEmpty]: Start isEmpty. Operand 3023 states and 7200 transitions. [2021-02-19 19:45:03,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-02-19 19:45:03,623 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:03,623 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:03,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:03,823 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:03,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:03,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2069239707, now seen corresponding path program 64 times [2021-02-19 19:45:03,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:03,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135326355] [2021-02-19 19:45:03,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:03,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:03,976 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:03,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135326355] [2021-02-19 19:45:03,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347632648] [2021-02-19 19:45:03,976 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:03,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:45:03,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:04,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 37 conjunts are in the unsatisfiable core [2021-02-19 19:45:04,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:04,659 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 73 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:04,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:04,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 22] total 33 [2021-02-19 19:45:04,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013491192] [2021-02-19 19:45:04,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 19:45:04,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:04,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 19:45:04,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=881, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 19:45:04,660 INFO L87 Difference]: Start difference. First operand 3023 states and 7200 transitions. Second operand has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:08,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:08,917 INFO L93 Difference]: Finished difference Result 4059 states and 9228 transitions. [2021-02-19 19:45:08,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-02-19 19:45:08,918 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-02-19 19:45:08,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:08,923 INFO L225 Difference]: With dead ends: 4059 [2021-02-19 19:45:08,923 INFO L226 Difference]: Without dead ends: 4055 [2021-02-19 19:45:08,925 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8705 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5366, Invalid=17586, Unknown=0, NotChecked=0, Total=22952 [2021-02-19 19:45:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-02-19 19:45:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 3023. [2021-02-19 19:45:08,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3023 states, 3022 states have (on average 2.3821972203838517) internal successors, (7199), 3022 states have internal predecessors, (7199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:08,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3023 states to 3023 states and 7199 transitions. [2021-02-19 19:45:08,952 INFO L78 Accepts]: Start accepts. Automaton has 3023 states and 7199 transitions. Word has length 49 [2021-02-19 19:45:08,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:08,952 INFO L480 AbstractCegarLoop]: Abstraction has 3023 states and 7199 transitions. [2021-02-19 19:45:08,952 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.6176470588235294) internal successors, (89), 33 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:08,952 INFO L276 IsEmpty]: Start isEmpty. Operand 3023 states and 7199 transitions. [2021-02-19 19:45:08,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:45:08,954 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:08,954 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:09,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-02-19 19:45:09,155 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:09,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:09,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1818912693, now seen corresponding path program 65 times [2021-02-19 19:45:09,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:09,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301298857] [2021-02-19 19:45:09,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:09,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:09,344 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 1 proven. 161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:09,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301298857] [2021-02-19 19:45:09,344 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511680006] [2021-02-19 19:45:09,344 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 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 [2021-02-19 19:45:09,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-02-19 19:45:09,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:09,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 19:45:09,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:09,526 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:09,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:09,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 13 [2021-02-19 19:45:09,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448521308] [2021-02-19 19:45:09,527 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-02-19 19:45:09,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:09,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-02-19 19:45:09,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:45:09,527 INFO L87 Difference]: Start difference. First operand 3023 states and 7199 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) 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) [2021-02-19 19:45:09,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:09,755 INFO L93 Difference]: Finished difference Result 4018 states and 9410 transitions. [2021-02-19 19:45:09,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 19:45:09,756 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) 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 51 [2021-02-19 19:45:09,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:09,761 INFO L225 Difference]: With dead ends: 4018 [2021-02-19 19:45:09,761 INFO L226 Difference]: Without dead ends: 3949 [2021-02-19 19:45:09,761 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2021-02-19 19:45:09,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2021-02-19 19:45:09,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 3564. [2021-02-19 19:45:09,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3564 states, 3563 states have (on average 2.4139769856862197) internal successors, (8601), 3563 states have internal predecessors, (8601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:09,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3564 states to 3564 states and 8601 transitions. [2021-02-19 19:45:09,794 INFO L78 Accepts]: Start accepts. Automaton has 3564 states and 8601 transitions. Word has length 51 [2021-02-19 19:45:09,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:09,794 INFO L480 AbstractCegarLoop]: Abstraction has 3564 states and 8601 transitions. [2021-02-19 19:45:09,794 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) 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) [2021-02-19 19:45:09,794 INFO L276 IsEmpty]: Start isEmpty. Operand 3564 states and 8601 transitions. [2021-02-19 19:45:09,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:45:09,796 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:09,797 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:09,997 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-02-19 19:45:09,997 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:09,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:09,998 INFO L82 PathProgramCache]: Analyzing trace with hash -595940323, now seen corresponding path program 66 times [2021-02-19 19:45:09,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:09,998 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399099722] [2021-02-19 19:45:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:10,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:10,459 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:10,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399099722] [2021-02-19 19:45:10,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958570900] [2021-02-19 19:45:10,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:10,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-02-19 19:45:10,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 39 conjunts are in the unsatisfiable core [2021-02-19 19:45:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:10,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:10,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 15] total 37 [2021-02-19 19:45:10,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882242669] [2021-02-19 19:45:10,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-02-19 19:45:10,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:10,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-02-19 19:45:10,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1197, Unknown=0, NotChecked=0, Total=1332 [2021-02-19 19:45:10,953 INFO L87 Difference]: Start difference. First operand 3564 states and 8601 transitions. Second operand has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:13,141 INFO L93 Difference]: Finished difference Result 4574 states and 10570 transitions. [2021-02-19 19:45:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 19:45:13,142 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-02-19 19:45:13,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:13,148 INFO L225 Difference]: With dead ends: 4574 [2021-02-19 19:45:13,148 INFO L226 Difference]: Without dead ends: 4571 [2021-02-19 19:45:13,148 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=447, Invalid=3843, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 19:45:13,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4571 states. [2021-02-19 19:45:13,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4571 to 3534. [2021-02-19 19:45:13,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3534 states, 3533 states have (on average 2.4152278516841212) internal successors, (8533), 3533 states have internal predecessors, (8533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:13,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3534 states to 3534 states and 8533 transitions. [2021-02-19 19:45:13,189 INFO L78 Accepts]: Start accepts. Automaton has 3534 states and 8533 transitions. Word has length 51 [2021-02-19 19:45:13,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:13,189 INFO L480 AbstractCegarLoop]: Abstraction has 3534 states and 8533 transitions. [2021-02-19 19:45:13,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5675675675675675) internal successors, (95), 37 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:13,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3534 states and 8533 transitions. [2021-02-19 19:45:13,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:45:13,192 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:13,192 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:13,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2021-02-19 19:45:13,393 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:13,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:13,393 INFO L82 PathProgramCache]: Analyzing trace with hash 250158497, now seen corresponding path program 67 times [2021-02-19 19:45:13,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:13,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432340690] [2021-02-19 19:45:13,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:13,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:13,689 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:13,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432340690] [2021-02-19 19:45:13,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1709716537] [2021-02-19 19:45:13,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:13,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:13,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 19:45:13,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:14,542 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:14,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:14,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 23] total 39 [2021-02-19 19:45:14,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752466415] [2021-02-19 19:45:14,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-02-19 19:45:14,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:14,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-02-19 19:45:14,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1386, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 19:45:14,544 INFO L87 Difference]: Start difference. First operand 3534 states and 8533 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 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) [2021-02-19 19:45:21,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:21,225 INFO L93 Difference]: Finished difference Result 7445 states and 16594 transitions. [2021-02-19 19:45:21,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-02-19 19:45:21,226 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 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 51 [2021-02-19 19:45:21,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:21,235 INFO L225 Difference]: With dead ends: 7445 [2021-02-19 19:45:21,235 INFO L226 Difference]: Without dead ends: 7421 [2021-02-19 19:45:21,236 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6726 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1955, Invalid=18637, Unknown=0, NotChecked=0, Total=20592 [2021-02-19 19:45:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7421 states. [2021-02-19 19:45:21,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7421 to 3801. [2021-02-19 19:45:21,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 2.4194736842105264) internal successors, (9194), 3800 states have internal predecessors, (9194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:21,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 9194 transitions. [2021-02-19 19:45:21,280 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 9194 transitions. Word has length 51 [2021-02-19 19:45:21,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:21,280 INFO L480 AbstractCegarLoop]: Abstraction has 3801 states and 9194 transitions. [2021-02-19 19:45:21,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 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) [2021-02-19 19:45:21,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 9194 transitions. [2021-02-19 19:45:21,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:45:21,283 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:21,283 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:21,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:21,486 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:21,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:21,486 INFO L82 PathProgramCache]: Analyzing trace with hash -480207413, now seen corresponding path program 68 times [2021-02-19 19:45:21,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:21,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668203212] [2021-02-19 19:45:21,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:21,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:21,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668203212] [2021-02-19 19:45:21,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857050075] [2021-02-19 19:45:21,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:21,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:45:21,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:21,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 52 conjunts are in the unsatisfiable core [2021-02-19 19:45:21,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:22,637 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 17 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:22,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:22,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 24] total 38 [2021-02-19 19:45:22,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905060836] [2021-02-19 19:45:22,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-02-19 19:45:22,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:22,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-02-19 19:45:22,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=1308, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 19:45:22,638 INFO L87 Difference]: Start difference. First operand 3801 states and 9194 transitions. Second operand has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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) [2021-02-19 19:45:28,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:28,328 INFO L93 Difference]: Finished difference Result 5719 states and 13052 transitions. [2021-02-19 19:45:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-02-19 19:45:28,329 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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 51 [2021-02-19 19:45:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:28,336 INFO L225 Difference]: With dead ends: 5719 [2021-02-19 19:45:28,336 INFO L226 Difference]: Without dead ends: 5715 [2021-02-19 19:45:28,336 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4357 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1409, Invalid=13111, Unknown=0, NotChecked=0, Total=14520 [2021-02-19 19:45:28,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5715 states. [2021-02-19 19:45:28,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5715 to 3599. [2021-02-19 19:45:28,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3599 states, 3598 states have (on average 2.4171762090050026) internal successors, (8697), 3598 states have internal predecessors, (8697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:28,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3599 states to 3599 states and 8697 transitions. [2021-02-19 19:45:28,380 INFO L78 Accepts]: Start accepts. Automaton has 3599 states and 8697 transitions. Word has length 51 [2021-02-19 19:45:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:28,380 INFO L480 AbstractCegarLoop]: Abstraction has 3599 states and 8697 transitions. [2021-02-19 19:45:28,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 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) [2021-02-19 19:45:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 3599 states and 8697 transitions. [2021-02-19 19:45:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:45:28,384 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:28,384 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:28,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-02-19 19:45:28,595 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash 2146581541, now seen corresponding path program 69 times [2021-02-19 19:45:28,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:28,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813566580] [2021-02-19 19:45:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:28,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:28,871 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:28,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813566580] [2021-02-19 19:45:28,871 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833738611] [2021-02-19 19:45:28,871 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:28,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-02-19 19:45:28,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:28,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:45:28,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:29,761 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 2 proven. 160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:29,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:29,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 23] total 40 [2021-02-19 19:45:29,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711334792] [2021-02-19 19:45:29,761 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:45:29,762 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:29,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:45:29,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1453, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:45:29,762 INFO L87 Difference]: Start difference. First operand 3599 states and 8697 transitions. Second operand has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 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) [2021-02-19 19:45:38,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:38,882 INFO L93 Difference]: Finished difference Result 9190 states and 20382 transitions. [2021-02-19 19:45:38,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-02-19 19:45:38,883 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 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 51 [2021-02-19 19:45:38,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:38,894 INFO L225 Difference]: With dead ends: 9190 [2021-02-19 19:45:38,894 INFO L226 Difference]: Without dead ends: 9142 [2021-02-19 19:45:38,895 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10597 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=3311, Invalid=26791, Unknown=0, NotChecked=0, Total=30102 [2021-02-19 19:45:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9142 states. [2021-02-19 19:45:38,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9142 to 3554. [2021-02-19 19:45:38,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3554 states, 3553 states have (on average 2.414579228820715) internal successors, (8579), 3553 states have internal predecessors, (8579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:38,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3554 states to 3554 states and 8579 transitions. [2021-02-19 19:45:38,943 INFO L78 Accepts]: Start accepts. Automaton has 3554 states and 8579 transitions. Word has length 51 [2021-02-19 19:45:38,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:38,943 INFO L480 AbstractCegarLoop]: Abstraction has 3554 states and 8579 transitions. [2021-02-19 19:45:38,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 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) [2021-02-19 19:45:38,943 INFO L276 IsEmpty]: Start isEmpty. Operand 3554 states and 8579 transitions. [2021-02-19 19:45:38,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:45:38,946 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:38,946 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:39,147 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-02-19 19:45:39,147 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:39,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:39,148 INFO L82 PathProgramCache]: Analyzing trace with hash 921683881, now seen corresponding path program 70 times [2021-02-19 19:45:39,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:39,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453718031] [2021-02-19 19:45:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:39,458 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:39,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453718031] [2021-02-19 19:45:39,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785810206] [2021-02-19 19:45:39,459 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:39,483 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:45:39,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:39,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:45:39,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 6 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:40,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:40,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 23] total 41 [2021-02-19 19:45:40,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088903647] [2021-02-19 19:45:40,331 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:45:40,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:40,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:45:40,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=1520, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:45:40,331 INFO L87 Difference]: Start difference. First operand 3554 states and 8579 transitions. Second operand has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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) [2021-02-19 19:45:48,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:48,957 INFO L93 Difference]: Finished difference Result 10995 states and 24217 transitions. [2021-02-19 19:45:48,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2021-02-19 19:45:48,958 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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 51 [2021-02-19 19:45:48,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:48,971 INFO L225 Difference]: With dead ends: 10995 [2021-02-19 19:45:48,971 INFO L226 Difference]: Without dead ends: 10917 [2021-02-19 19:45:48,973 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11924 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=4150, Invalid=28792, Unknown=0, NotChecked=0, Total=32942 [2021-02-19 19:45:48,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10917 states. [2021-02-19 19:45:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10917 to 3498. [2021-02-19 19:45:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3498 states, 3497 states have (on average 2.4177866742922505) internal successors, (8455), 3497 states have internal predecessors, (8455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:49,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3498 states to 3498 states and 8455 transitions. [2021-02-19 19:45:49,039 INFO L78 Accepts]: Start accepts. Automaton has 3498 states and 8455 transitions. Word has length 51 [2021-02-19 19:45:49,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:49,039 INFO L480 AbstractCegarLoop]: Abstraction has 3498 states and 8455 transitions. [2021-02-19 19:45:49,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 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) [2021-02-19 19:45:49,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3498 states and 8455 transitions. [2021-02-19 19:45:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:45:49,042 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:49,042 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:49,242 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2021-02-19 19:45:49,243 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:49,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:49,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1152679891, now seen corresponding path program 71 times [2021-02-19 19:45:49,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:49,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379981797] [2021-02-19 19:45:49,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:49,530 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:49,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379981797] [2021-02-19 19:45:49,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014762252] [2021-02-19 19:45:49,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:45:49,580 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-02-19 19:45:49,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:49,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:45:49,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:50,407 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 12 proven. 150 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:50,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:50,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 43 [2021-02-19 19:45:50,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [595116967] [2021-02-19 19:45:50,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-02-19 19:45:50,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:50,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-02-19 19:45:50,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1660, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:45:50,408 INFO L87 Difference]: Start difference. First operand 3498 states and 8455 transitions. Second operand has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 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) [2021-02-19 19:45:57,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:45:57,421 INFO L93 Difference]: Finished difference Result 12850 states and 28081 transitions. [2021-02-19 19:45:57,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-02-19 19:45:57,423 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 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 51 [2021-02-19 19:45:57,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:45:57,438 INFO L225 Difference]: With dead ends: 12850 [2021-02-19 19:45:57,438 INFO L226 Difference]: Without dead ends: 12643 [2021-02-19 19:45:57,439 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9889 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4035, Invalid=22697, Unknown=0, NotChecked=0, Total=26732 [2021-02-19 19:45:57,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12643 states. [2021-02-19 19:45:57,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12643 to 3486. [2021-02-19 19:45:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 2.4192252510760404) internal successors, (8431), 3485 states have internal predecessors, (8431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:45:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 8431 transitions. [2021-02-19 19:45:57,500 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 8431 transitions. Word has length 51 [2021-02-19 19:45:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:45:57,500 INFO L480 AbstractCegarLoop]: Abstraction has 3486 states and 8431 transitions. [2021-02-19 19:45:57,500 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.2045454545454546) internal successors, (97), 43 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) [2021-02-19 19:45:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 8431 transitions. [2021-02-19 19:45:57,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:45:57,502 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:45:57,502 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:45:57,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-02-19 19:45:57,703 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:45:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:45:57,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1870715471, now seen corresponding path program 72 times [2021-02-19 19:45:57,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:45:57,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047566433] [2021-02-19 19:45:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:45:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:45:58,009 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:58,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047566433] [2021-02-19 19:45:58,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331404458] [2021-02-19 19:45:58,009 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 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 [2021-02-19 19:45:58,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-02-19 19:45:58,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:45:58,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 47 conjunts are in the unsatisfiable core [2021-02-19 19:45:58,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:45:58,951 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 20 proven. 142 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:45:58,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:45:58,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2021-02-19 19:45:58,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945459775] [2021-02-19 19:45:58,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-02-19 19:45:58,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:45:58,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-02-19 19:45:58,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1726, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 19:45:58,952 INFO L87 Difference]: Start difference. First operand 3486 states and 8431 transitions. Second operand has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 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) [2021-02-19 19:46:05,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:05,558 INFO L93 Difference]: Finished difference Result 14077 states and 30678 transitions. [2021-02-19 19:46:05,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-02-19 19:46:05,559 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 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 51 [2021-02-19 19:46:05,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:05,576 INFO L225 Difference]: With dead ends: 14077 [2021-02-19 19:46:05,576 INFO L226 Difference]: Without dead ends: 13789 [2021-02-19 19:46:05,577 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9832 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=4381, Invalid=21701, Unknown=0, NotChecked=0, Total=26082 [2021-02-19 19:46:05,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13789 states. [2021-02-19 19:46:05,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13789 to 3506. [2021-02-19 19:46:05,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3506 states, 3505 states have (on average 2.416833095577746) internal successors, (8471), 3505 states have internal predecessors, (8471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:05,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3506 states to 3506 states and 8471 transitions. [2021-02-19 19:46:05,637 INFO L78 Accepts]: Start accepts. Automaton has 3506 states and 8471 transitions. Word has length 51 [2021-02-19 19:46:05,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:05,637 INFO L480 AbstractCegarLoop]: Abstraction has 3506 states and 8471 transitions. [2021-02-19 19:46:05,637 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.1555555555555554) internal successors, (97), 44 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) [2021-02-19 19:46:05,637 INFO L276 IsEmpty]: Start isEmpty. Operand 3506 states and 8471 transitions. [2021-02-19 19:46:05,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:46:05,640 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:05,640 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:05,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2021-02-19 19:46:05,857 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:05,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:05,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1307281355, now seen corresponding path program 73 times [2021-02-19 19:46:05,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:05,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197027084] [2021-02-19 19:46:05,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:05,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:06,198 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:06,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197027084] [2021-02-19 19:46:06,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131543831] [2021-02-19 19:46:06,199 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:06,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:06,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 19:46:06,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:07,207 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 30 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:07,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:07,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 45 [2021-02-19 19:46:07,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155348202] [2021-02-19 19:46:07,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-02-19 19:46:07,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:07,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-02-19 19:46:07,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1788, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:46:07,209 INFO L87 Difference]: Start difference. First operand 3506 states and 8471 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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) [2021-02-19 19:46:14,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:14,283 INFO L93 Difference]: Finished difference Result 14360 states and 31107 transitions. [2021-02-19 19:46:14,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-02-19 19:46:14,284 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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 51 [2021-02-19 19:46:14,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:14,303 INFO L225 Difference]: With dead ends: 14360 [2021-02-19 19:46:14,303 INFO L226 Difference]: Without dead ends: 13892 [2021-02-19 19:46:14,306 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11895 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=5935, Invalid=25571, Unknown=0, NotChecked=0, Total=31506 [2021-02-19 19:46:14,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13892 states. [2021-02-19 19:46:14,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13892 to 3518. [2021-02-19 19:46:14,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3517 states have (on average 2.415410861529713) internal successors, (8495), 3517 states have internal predecessors, (8495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:14,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 8495 transitions. [2021-02-19 19:46:14,401 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 8495 transitions. Word has length 51 [2021-02-19 19:46:14,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:14,401 INFO L480 AbstractCegarLoop]: Abstraction has 3518 states and 8495 transitions. [2021-02-19 19:46:14,401 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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) [2021-02-19 19:46:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 8495 transitions. [2021-02-19 19:46:14,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:46:14,403 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:14,403 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:14,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:14,606 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:14,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:14,606 INFO L82 PathProgramCache]: Analyzing trace with hash 262485945, now seen corresponding path program 74 times [2021-02-19 19:46:14,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:14,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506264779] [2021-02-19 19:46:14,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:14,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:15,000 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:15,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506264779] [2021-02-19 19:46:15,001 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830270074] [2021-02-19 19:46:15,001 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 [2021-02-19 19:46:15,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:46:15,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:46:15,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 19:46:15,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 42 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:15,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:15,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23] total 45 [2021-02-19 19:46:15,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380532226] [2021-02-19 19:46:15,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-02-19 19:46:15,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:15,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-02-19 19:46:15,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=297, Invalid=1773, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:46:15,949 INFO L87 Difference]: Start difference. First operand 3518 states and 8495 transitions. Second operand has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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) [2021-02-19 19:46:22,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:22,208 INFO L93 Difference]: Finished difference Result 11991 states and 26143 transitions. [2021-02-19 19:46:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-02-19 19:46:22,210 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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 51 [2021-02-19 19:46:22,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:22,224 INFO L225 Difference]: With dead ends: 11991 [2021-02-19 19:46:22,224 INFO L226 Difference]: Without dead ends: 11337 [2021-02-19 19:46:22,226 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9503 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=5557, Invalid=21833, Unknown=0, NotChecked=0, Total=27390 [2021-02-19 19:46:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11337 states. [2021-02-19 19:46:22,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11337 to 3645. [2021-02-19 19:46:22,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 2.372941822173436) internal successors, (8647), 3644 states have internal predecessors, (8647), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:22,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 8647 transitions. [2021-02-19 19:46:22,290 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 8647 transitions. Word has length 51 [2021-02-19 19:46:22,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:22,290 INFO L480 AbstractCegarLoop]: Abstraction has 3645 states and 8647 transitions. [2021-02-19 19:46:22,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.108695652173913) internal successors, (97), 45 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) [2021-02-19 19:46:22,290 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 8647 transitions. [2021-02-19 19:46:22,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-02-19 19:46:22,293 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:22,293 INFO L506 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:22,515 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:22,516 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:22,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:22,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1490384707, now seen corresponding path program 75 times [2021-02-19 19:46:22,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:22,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593206980] [2021-02-19 19:46:22,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:22,749 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:22,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593206980] [2021-02-19 19:46:22,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042300683] [2021-02-19 19:46:22,749 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 [2021-02-19 19:46:22,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-02-19 19:46:22,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:46:22,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:46:22,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:23,818 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 66 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:23,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:23,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 24] total 37 [2021-02-19 19:46:23,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951739520] [2021-02-19 19:46:23,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 19:46:23,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:23,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 19:46:23,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=247, Invalid=1159, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:46:23,819 INFO L87 Difference]: Start difference. First operand 3645 states and 8647 transitions. Second operand has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 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) [2021-02-19 19:46:34,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:34,562 INFO L93 Difference]: Finished difference Result 8265 states and 18251 transitions. [2021-02-19 19:46:34,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2021-02-19 19:46:34,564 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 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 51 [2021-02-19 19:46:34,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:34,575 INFO L225 Difference]: With dead ends: 8265 [2021-02-19 19:46:34,575 INFO L226 Difference]: Without dead ends: 8261 [2021-02-19 19:46:34,578 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22325 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=11066, Invalid=40690, Unknown=0, NotChecked=0, Total=51756 [2021-02-19 19:46:34,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8261 states. [2021-02-19 19:46:34,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8261 to 3715. [2021-02-19 19:46:34,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3715 states, 3714 states have (on average 2.389876144318794) internal successors, (8876), 3714 states have internal predecessors, (8876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3715 states to 3715 states and 8876 transitions. [2021-02-19 19:46:34,625 INFO L78 Accepts]: Start accepts. Automaton has 3715 states and 8876 transitions. Word has length 51 [2021-02-19 19:46:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:34,625 INFO L480 AbstractCegarLoop]: Abstraction has 3715 states and 8876 transitions. [2021-02-19 19:46:34,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4473684210526314) internal successors, (93), 37 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) [2021-02-19 19:46:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3715 states and 8876 transitions. [2021-02-19 19:46:34,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 19:46:34,629 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:34,630 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:34,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable266,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:46:34,852 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:34,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:34,853 INFO L82 PathProgramCache]: Analyzing trace with hash -352448375, now seen corresponding path program 76 times [2021-02-19 19:46:34,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:34,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608148773] [2021-02-19 19:46:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:35,299 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:35,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608148773] [2021-02-19 19:46:35,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677825260] [2021-02-19 19:46:35,299 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 [2021-02-19 19:46:35,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:46:35,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:46:35,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-02-19 19:46:35,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:36,663 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 81 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:36,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:36,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-02-19 19:46:36,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952277208] [2021-02-19 19:46:36,664 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-02-19 19:46:36,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:36,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-02-19 19:46:36,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=1843, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:46:36,665 INFO L87 Difference]: Start difference. First operand 3715 states and 8876 transitions. Second operand has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:45,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:46:45,305 INFO L93 Difference]: Finished difference Result 5654 states and 12623 transitions. [2021-02-19 19:46:45,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2021-02-19 19:46:45,307 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have 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 [2021-02-19 19:46:45,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:46:45,314 INFO L225 Difference]: With dead ends: 5654 [2021-02-19 19:46:45,314 INFO L226 Difference]: Without dead ends: 5342 [2021-02-19 19:46:45,316 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13205 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=9334, Invalid=26198, Unknown=0, NotChecked=0, Total=35532 [2021-02-19 19:46:45,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5342 states. [2021-02-19 19:46:45,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5342 to 3714. [2021-02-19 19:46:45,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.3859412873687047) internal successors, (8859), 3713 states have internal predecessors, (8859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:45,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 8859 transitions. [2021-02-19 19:46:45,353 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 8859 transitions. Word has length 53 [2021-02-19 19:46:45,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:46:45,353 INFO L480 AbstractCegarLoop]: Abstraction has 3714 states and 8859 transitions. [2021-02-19 19:46:45,353 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1041666666666665) internal successors, (101), 47 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:46:45,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 8859 transitions. [2021-02-19 19:46:45,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-02-19 19:46:45,356 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:46:45,356 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:46:45,556 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2021-02-19 19:46:45,556 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:46:45,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:46:45,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1598000155, now seen corresponding path program 77 times [2021-02-19 19:46:45,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:46:45,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665043223] [2021-02-19 19:46:45,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:46:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:46:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:45,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665043223] [2021-02-19 19:46:45,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254855925] [2021-02-19 19:46:45,819 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 19:46:45,853 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-02-19 19:46:45,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:46:45,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 41 conjunts are in the unsatisfiable core [2021-02-19 19:46:45,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:46:47,204 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 91 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:46:47,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:46:47,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 25] total 37 [2021-02-19 19:46:47,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533680840] [2021-02-19 19:46:47,205 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 19:46:47,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:46:47,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 19:46:47,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1128, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 19:46:47,206 INFO L87 Difference]: Start difference. First operand 3714 states and 8859 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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) [2021-02-19 19:47:02,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:02,312 INFO L93 Difference]: Finished difference Result 5232 states and 11847 transitions. [2021-02-19 19:47:02,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-02-19 19:47:02,314 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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 53 [2021-02-19 19:47:02,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:02,320 INFO L225 Difference]: With dead ends: 5232 [2021-02-19 19:47:02,320 INFO L226 Difference]: Without dead ends: 5228 [2021-02-19 19:47:02,325 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32350 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=15661, Invalid=56431, Unknown=0, NotChecked=0, Total=72092 [2021-02-19 19:47:02,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5228 states. [2021-02-19 19:47:02,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5228 to 3714. [2021-02-19 19:47:02,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3714 states, 3713 states have (on average 2.3856719633719363) internal successors, (8858), 3713 states have internal predecessors, (8858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:02,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3714 states to 3714 states and 8858 transitions. [2021-02-19 19:47:02,361 INFO L78 Accepts]: Start accepts. Automaton has 3714 states and 8858 transitions. Word has length 53 [2021-02-19 19:47:02,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:02,361 INFO L480 AbstractCegarLoop]: Abstraction has 3714 states and 8858 transitions. [2021-02-19 19:47:02,361 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 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) [2021-02-19 19:47:02,361 INFO L276 IsEmpty]: Start isEmpty. Operand 3714 states and 8858 transitions. [2021-02-19 19:47:02,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:47:02,365 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:02,365 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:02,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2021-02-19 19:47:02,565 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:02,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:02,566 INFO L82 PathProgramCache]: Analyzing trace with hash -323126137, now seen corresponding path program 78 times [2021-02-19 19:47:02,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:02,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719532142] [2021-02-19 19:47:02,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:02,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 1 proven. 199 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:02,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719532142] [2021-02-19 19:47:02,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403891256] [2021-02-19 19:47:02,950 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 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 [2021-02-19 19:47:02,981 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-02-19 19:47:02,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:02,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:47:02,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:03,256 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:03,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:03,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13] total 14 [2021-02-19 19:47:03,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789967507] [2021-02-19 19:47:03,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-02-19 19:47:03,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:03,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-02-19 19:47:03,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:47:03,257 INFO L87 Difference]: Start difference. First operand 3714 states and 8858 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) 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) [2021-02-19 19:47:03,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:03,718 INFO L93 Difference]: Finished difference Result 4862 states and 11399 transitions. [2021-02-19 19:47:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 19:47:03,720 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) 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 55 [2021-02-19 19:47:03,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:03,727 INFO L225 Difference]: With dead ends: 4862 [2021-02-19 19:47:03,727 INFO L226 Difference]: Without dead ends: 4787 [2021-02-19 19:47:03,727 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2021-02-19 19:47:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4787 states. [2021-02-19 19:47:03,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4787 to 4330. [2021-02-19 19:47:03,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4329 states have (on average 2.414876414876415) internal successors, (10454), 4329 states have internal predecessors, (10454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:03,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 10454 transitions. [2021-02-19 19:47:03,771 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 10454 transitions. Word has length 55 [2021-02-19 19:47:03,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:03,771 INFO L480 AbstractCegarLoop]: Abstraction has 4330 states and 10454 transitions. [2021-02-19 19:47:03,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) 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) [2021-02-19 19:47:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 10454 transitions. [2021-02-19 19:47:03,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:47:03,775 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:03,775 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:03,975 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable293,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:03,975 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:03,975 INFO L82 PathProgramCache]: Analyzing trace with hash 1246427865, now seen corresponding path program 79 times [2021-02-19 19:47:03,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:03,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196034494] [2021-02-19 19:47:03,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:04,893 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:04,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196034494] [2021-02-19 19:47:04,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993273825] [2021-02-19 19:47:04,893 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:04,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:04,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 61 conjunts are in the unsatisfiable core [2021-02-19 19:47:04,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:06,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:06,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-02-19 19:47:06,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989071504] [2021-02-19 19:47:06,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-02-19 19:47:06,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:06,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-02-19 19:47:06,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=2261, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:47:06,902 INFO L87 Difference]: Start difference. First operand 4330 states and 10454 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:17,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:17,648 INFO L93 Difference]: Finished difference Result 5933 states and 13623 transitions. [2021-02-19 19:47:17,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-02-19 19:47:17,650 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:47:17,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:17,657 INFO L225 Difference]: With dead ends: 5933 [2021-02-19 19:47:17,657 INFO L226 Difference]: Without dead ends: 5927 [2021-02-19 19:47:17,658 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4427 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1222, Invalid=15548, Unknown=0, NotChecked=0, Total=16770 [2021-02-19 19:47:17,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5927 states. [2021-02-19 19:47:17,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5927 to 4297. [2021-02-19 19:47:17,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4297 states, 4296 states have (on average 2.416201117318436) internal successors, (10380), 4296 states have internal predecessors, (10380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:17,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4297 states to 4297 states and 10380 transitions. [2021-02-19 19:47:17,699 INFO L78 Accepts]: Start accepts. Automaton has 4297 states and 10380 transitions. Word has length 55 [2021-02-19 19:47:17,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:17,699 INFO L480 AbstractCegarLoop]: Abstraction has 4297 states and 10380 transitions. [2021-02-19 19:47:17,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:17,699 INFO L276 IsEmpty]: Start isEmpty. Operand 4297 states and 10380 transitions. [2021-02-19 19:47:17,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:47:17,702 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:17,703 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:17,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:17,903 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:17,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:17,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1619854243, now seen corresponding path program 80 times [2021-02-19 19:47:17,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:17,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723221788] [2021-02-19 19:47:17,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:17,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:18,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723221788] [2021-02-19 19:47:18,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948756513] [2021-02-19 19:47:18,374 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:18,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:47:18,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:18,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 19:47:18,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:19,999 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:19,999 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:19,999 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 25] total 42 [2021-02-19 19:47:20,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059369076] [2021-02-19 19:47:20,000 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-02-19 19:47:20,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:20,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-02-19 19:47:20,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1617, Unknown=0, NotChecked=0, Total=1806 [2021-02-19 19:47:20,001 INFO L87 Difference]: Start difference. First operand 4297 states and 10380 transitions. Second operand has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:35,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:35,504 INFO L93 Difference]: Finished difference Result 8896 states and 19852 transitions. [2021-02-19 19:47:35,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-02-19 19:47:35,506 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:47:35,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:35,516 INFO L225 Difference]: With dead ends: 8896 [2021-02-19 19:47:35,517 INFO L226 Difference]: Without dead ends: 8872 [2021-02-19 19:47:35,518 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8420 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2202, Invalid=23238, Unknown=0, NotChecked=0, Total=25440 [2021-02-19 19:47:35,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8872 states. [2021-02-19 19:47:35,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8872 to 4583. [2021-02-19 19:47:35,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 2.4203404626800524) internal successors, (11090), 4582 states have internal predecessors, (11090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:35,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 11090 transitions. [2021-02-19 19:47:35,569 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 11090 transitions. Word has length 55 [2021-02-19 19:47:35,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:35,569 INFO L480 AbstractCegarLoop]: Abstraction has 4583 states and 11090 transitions. [2021-02-19 19:47:35,569 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.441860465116279) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:35,569 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 11090 transitions. [2021-02-19 19:47:35,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:47:35,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:35,572 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:35,772 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:35,772 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:35,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:35,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1944747143, now seen corresponding path program 81 times [2021-02-19 19:47:35,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:35,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287117425] [2021-02-19 19:47:35,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:35,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:36,229 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:36,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287117425] [2021-02-19 19:47:36,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890686141] [2021-02-19 19:47:36,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:36,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-02-19 19:47:36,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:36,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 19:47:36,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:38,000 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 19 proven. 181 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:38,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:38,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 26] total 41 [2021-02-19 19:47:38,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012600662] [2021-02-19 19:47:38,001 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-02-19 19:47:38,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:38,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-02-19 19:47:38,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=1533, Unknown=0, NotChecked=0, Total=1722 [2021-02-19 19:47:38,001 INFO L87 Difference]: Start difference. First operand 4583 states and 11090 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:47:52,641 INFO L93 Difference]: Finished difference Result 6731 states and 15383 transitions. [2021-02-19 19:47:52,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-02-19 19:47:52,644 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:47:52,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:47:52,652 INFO L225 Difference]: With dead ends: 6731 [2021-02-19 19:47:52,653 INFO L226 Difference]: Without dead ends: 6727 [2021-02-19 19:47:52,654 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5320 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1571, Invalid=15985, Unknown=0, NotChecked=0, Total=17556 [2021-02-19 19:47:52,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6727 states. [2021-02-19 19:47:52,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6727 to 4364. [2021-02-19 19:47:52,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4364 states, 4363 states have (on average 2.418748567499427) internal successors, (10553), 4363 states have internal predecessors, (10553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4364 states to 4364 states and 10553 transitions. [2021-02-19 19:47:52,701 INFO L78 Accepts]: Start accepts. Automaton has 4364 states and 10553 transitions. Word has length 55 [2021-02-19 19:47:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:47:52,701 INFO L480 AbstractCegarLoop]: Abstraction has 4364 states and 10553 transitions. [2021-02-19 19:47:52,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:47:52,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4364 states and 10553 transitions. [2021-02-19 19:47:52,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:47:52,705 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:47:52,705 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:47:52,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:52,906 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:47:52,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:47:52,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1796319969, now seen corresponding path program 82 times [2021-02-19 19:47:52,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:47:52,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073013653] [2021-02-19 19:47:52,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:47:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:47:53,473 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:53,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073013653] [2021-02-19 19:47:53,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156267816] [2021-02-19 19:47:53,474 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:47:53,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:47:53,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:47:53,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 58 conjunts are in the unsatisfiable core [2021-02-19 19:47:53,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:47:55,420 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 2 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:47:55,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:47:55,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 25] total 43 [2021-02-19 19:47:55,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237705222] [2021-02-19 19:47:55,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-02-19 19:47:55,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:47:55,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-02-19 19:47:55,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=1689, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 19:47:55,422 INFO L87 Difference]: Start difference. First operand 4364 states and 10553 transitions. Second operand has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:18,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:18,657 INFO L93 Difference]: Finished difference Result 10574 states and 23371 transitions. [2021-02-19 19:48:18,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2021-02-19 19:48:18,659 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:48:18,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:18,668 INFO L225 Difference]: With dead ends: 10574 [2021-02-19 19:48:18,669 INFO L226 Difference]: Without dead ends: 10526 [2021-02-19 19:48:18,670 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13796 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=3843, Invalid=34769, Unknown=0, NotChecked=0, Total=38612 [2021-02-19 19:48:18,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10526 states. [2021-02-19 19:48:18,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10526 to 4384. [2021-02-19 19:48:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4384 states, 4383 states have (on average 2.4177503992699063) internal successors, (10597), 4383 states have internal predecessors, (10597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4384 states to 4384 states and 10597 transitions. [2021-02-19 19:48:18,722 INFO L78 Accepts]: Start accepts. Automaton has 4384 states and 10597 transitions. Word has length 55 [2021-02-19 19:48:18,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:18,722 INFO L480 AbstractCegarLoop]: Abstraction has 4384 states and 10597 transitions. [2021-02-19 19:48:18,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4384 states and 10597 transitions. [2021-02-19 19:48:18,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:48:18,725 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:18,725 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:18,926 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2021-02-19 19:48:18,926 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:18,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:18,926 INFO L82 PathProgramCache]: Analyzing trace with hash 763414117, now seen corresponding path program 83 times [2021-02-19 19:48:18,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:18,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596187684] [2021-02-19 19:48:18,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:18,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:19,428 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:19,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596187684] [2021-02-19 19:48:19,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480914375] [2021-02-19 19:48:19,428 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:19,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-02-19 19:48:19,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:19,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 57 conjunts are in the unsatisfiable core [2021-02-19 19:48:19,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:21,113 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 6 proven. 194 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:21,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:21,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 26] total 45 [2021-02-19 19:48:21,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124133469] [2021-02-19 19:48:21,114 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-02-19 19:48:21,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:21,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-02-19 19:48:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=1840, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 19:48:21,115 INFO L87 Difference]: Start difference. First operand 4384 states and 10597 transitions. Second operand has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:39,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:48:39,621 INFO L93 Difference]: Finished difference Result 12886 states and 28355 transitions. [2021-02-19 19:48:39,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2021-02-19 19:48:39,623 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:48:39,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:48:39,637 INFO L225 Difference]: With dead ends: 12886 [2021-02-19 19:48:39,638 INFO L226 Difference]: Without dead ends: 12808 [2021-02-19 19:48:39,640 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17184 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=5283, Invalid=40727, Unknown=0, NotChecked=0, Total=46010 [2021-02-19 19:48:39,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12808 states. [2021-02-19 19:48:39,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12808 to 4292. [2021-02-19 19:48:39,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4292 states, 4291 states have (on average 2.4150547657888604) internal successors, (10363), 4291 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:39,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 10363 transitions. [2021-02-19 19:48:39,704 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 10363 transitions. Word has length 55 [2021-02-19 19:48:39,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:48:39,704 INFO L480 AbstractCegarLoop]: Abstraction has 4292 states and 10363 transitions. [2021-02-19 19:48:39,704 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.282608695652174) internal successors, (105), 45 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:48:39,704 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 10363 transitions. [2021-02-19 19:48:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:48:39,707 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:48:39,707 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:48:39,907 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2021-02-19 19:48:39,908 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:48:39,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:48:39,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1490415895, now seen corresponding path program 84 times [2021-02-19 19:48:39,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:48:39,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847436292] [2021-02-19 19:48:39,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:48:39,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:48:40,523 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:40,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847436292] [2021-02-19 19:48:40,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178921906] [2021-02-19 19:48:40,523 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:48:40,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-02-19 19:48:40,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:48:40,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 55 conjunts are in the unsatisfiable core [2021-02-19 19:48:40,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:48:42,385 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 12 proven. 188 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:48:42,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:48:42,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 26] total 46 [2021-02-19 19:48:42,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470590176] [2021-02-19 19:48:42,386 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-02-19 19:48:42,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:48:42,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-02-19 19:48:42,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=1912, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:48:42,387 INFO L87 Difference]: Start difference. First operand 4292 states and 10363 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:00,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:00,430 INFO L93 Difference]: Finished difference Result 15118 states and 33071 transitions. [2021-02-19 19:49:00,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-02-19 19:49:00,433 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:49:00,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:00,454 INFO L225 Difference]: With dead ends: 15118 [2021-02-19 19:49:00,454 INFO L226 Difference]: Without dead ends: 15004 [2021-02-19 19:49:00,457 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15794 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=5619, Invalid=36201, Unknown=0, NotChecked=0, Total=41820 [2021-02-19 19:49:00,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15004 states. [2021-02-19 19:49:00,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15004 to 4240. [2021-02-19 19:49:00,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4240 states, 4239 states have (on average 2.420146260910592) internal successors, (10259), 4239 states have internal predecessors, (10259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:00,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4240 states to 4240 states and 10259 transitions. [2021-02-19 19:49:00,554 INFO L78 Accepts]: Start accepts. Automaton has 4240 states and 10259 transitions. Word has length 55 [2021-02-19 19:49:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:00,554 INFO L480 AbstractCegarLoop]: Abstraction has 4240 states and 10259 transitions. [2021-02-19 19:49:00,554 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 4240 states and 10259 transitions. [2021-02-19 19:49:00,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:49:00,557 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:00,558 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:49:00,758 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable306 [2021-02-19 19:49:00,758 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:00,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:00,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1418151021, now seen corresponding path program 85 times [2021-02-19 19:49:00,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:00,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666149044] [2021-02-19 19:49:00,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:00,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:01,509 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:01,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666149044] [2021-02-19 19:49:01,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602082993] [2021-02-19 19:49:01,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:01,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:49:01,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:03,548 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 20 proven. 180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:03,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:03,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2021-02-19 19:49:03,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072980318] [2021-02-19 19:49:03,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-02-19 19:49:03,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:03,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-02-19 19:49:03,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=1905, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 19:49:03,549 INFO L87 Difference]: Start difference. First operand 4240 states and 10259 transitions. Second operand has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:16,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:16,161 INFO L93 Difference]: Finished difference Result 17236 states and 37602 transitions. [2021-02-19 19:49:16,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-02-19 19:49:16,164 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:49:16,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:16,183 INFO L225 Difference]: With dead ends: 17236 [2021-02-19 19:49:16,183 INFO L226 Difference]: Without dead ends: 16966 [2021-02-19 19:49:16,185 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9949 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=4135, Invalid=23255, Unknown=0, NotChecked=0, Total=27390 [2021-02-19 19:49:16,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16966 states. [2021-02-19 19:49:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16966 to 4264. [2021-02-19 19:49:16,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4264 states, 4263 states have (on average 2.4177809054656345) internal successors, (10307), 4263 states have internal predecessors, (10307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:16,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4264 states to 4264 states and 10307 transitions. [2021-02-19 19:49:16,268 INFO L78 Accepts]: Start accepts. Automaton has 4264 states and 10307 transitions. Word has length 55 [2021-02-19 19:49:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:16,268 INFO L480 AbstractCegarLoop]: Abstraction has 4264 states and 10307 transitions. [2021-02-19 19:49:16,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.234042553191489) internal successors, (105), 46 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 4264 states and 10307 transitions. [2021-02-19 19:49:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:49:16,270 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:16,270 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:49:16,471 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:16,471 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:16,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:16,471 INFO L82 PathProgramCache]: Analyzing trace with hash -366860559, now seen corresponding path program 86 times [2021-02-19 19:49:16,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:16,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056759632] [2021-02-19 19:49:16,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:17,180 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:17,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056759632] [2021-02-19 19:49:17,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618531389] [2021-02-19 19:49:17,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:17,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 19:49:17,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:17,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:49:17,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 30 proven. 170 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:19,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:19,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25] total 47 [2021-02-19 19:49:19,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289574931] [2021-02-19 19:49:19,126 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-02-19 19:49:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:19,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-02-19 19:49:19,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=1974, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 19:49:19,127 INFO L87 Difference]: Start difference. First operand 4264 states and 10307 transitions. Second operand has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:32,881 INFO L93 Difference]: Finished difference Result 18169 states and 39525 transitions. [2021-02-19 19:49:32,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-02-19 19:49:32,884 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:49:32,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:32,903 INFO L225 Difference]: With dead ends: 18169 [2021-02-19 19:49:32,903 INFO L226 Difference]: Without dead ends: 17716 [2021-02-19 19:49:32,905 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12252 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=5504, Invalid=27438, Unknown=0, NotChecked=0, Total=32942 [2021-02-19 19:49:32,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17716 states. [2021-02-19 19:49:32,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17716 to 4280. [2021-02-19 19:49:32,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4280 states, 4279 states have (on average 2.4162187426968917) internal successors, (10339), 4279 states have internal predecessors, (10339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4280 states to 4280 states and 10339 transitions. [2021-02-19 19:49:32,991 INFO L78 Accepts]: Start accepts. Automaton has 4280 states and 10339 transitions. Word has length 55 [2021-02-19 19:49:32,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:32,991 INFO L480 AbstractCegarLoop]: Abstraction has 4280 states and 10339 transitions. [2021-02-19 19:49:32,991 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.1875) internal successors, (105), 47 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:32,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4280 states and 10339 transitions. [2021-02-19 19:49:32,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:49:32,993 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:32,993 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:49:33,197 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable319 [2021-02-19 19:49:33,198 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:33,198 INFO L82 PathProgramCache]: Analyzing trace with hash -795576715, now seen corresponding path program 87 times [2021-02-19 19:49:33,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:33,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594177716] [2021-02-19 19:49:33,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:33,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:33,898 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:33,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594177716] [2021-02-19 19:49:33,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735377199] [2021-02-19 19:49:33,899 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:33,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-02-19 19:49:33,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:33,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 43 conjunts are in the unsatisfiable core [2021-02-19 19:49:33,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 42 proven. 158 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:35,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:35,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 48 [2021-02-19 19:49:35,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467068330] [2021-02-19 19:49:35,926 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-02-19 19:49:35,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:35,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-02-19 19:49:35,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=2039, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 19:49:35,927 INFO L87 Difference]: Start difference. First operand 4280 states and 10339 transitions. Second operand has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:49:50,253 INFO L93 Difference]: Finished difference Result 15803 states and 33500 transitions. [2021-02-19 19:49:50,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2021-02-19 19:49:50,256 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:49:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:49:50,270 INFO L225 Difference]: With dead ends: 15803 [2021-02-19 19:49:50,270 INFO L226 Difference]: Without dead ends: 15200 [2021-02-19 19:49:50,271 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14062 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=7026, Invalid=30416, Unknown=0, NotChecked=0, Total=37442 [2021-02-19 19:49:50,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15200 states. [2021-02-19 19:49:50,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15200 to 4292. [2021-02-19 19:49:50,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4292 states, 4291 states have (on average 2.4150547657888604) internal successors, (10363), 4291 states have internal predecessors, (10363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:50,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4292 states to 4292 states and 10363 transitions. [2021-02-19 19:49:50,337 INFO L78 Accepts]: Start accepts. Automaton has 4292 states and 10363 transitions. Word has length 55 [2021-02-19 19:49:50,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:49:50,337 INFO L480 AbstractCegarLoop]: Abstraction has 4292 states and 10363 transitions. [2021-02-19 19:49:50,338 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.142857142857143) internal successors, (105), 48 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:49:50,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4292 states and 10363 transitions. [2021-02-19 19:49:50,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:49:50,340 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:49:50,340 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:49:50,540 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-02-19 19:49:50,541 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:49:50,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:49:50,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1601703175, now seen corresponding path program 88 times [2021-02-19 19:49:50,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:49:50,541 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507001444] [2021-02-19 19:49:50,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:49:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:49:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:51,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507001444] [2021-02-19 19:49:51,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599404083] [2021-02-19 19:49:51,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:49:51,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 19:49:51,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:49:51,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 40 conjunts are in the unsatisfiable core [2021-02-19 19:49:51,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:49:53,619 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 56 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:49:53,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:49:53,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25] total 49 [2021-02-19 19:49:53,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810963560] [2021-02-19 19:49:53,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-02-19 19:49:53,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:49:53,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-02-19 19:49:53,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=2100, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 19:49:53,620 INFO L87 Difference]: Start difference. First operand 4292 states and 10363 transitions. Second operand has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:08,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:50:08,816 INFO L93 Difference]: Finished difference Result 14668 states and 31991 transitions. [2021-02-19 19:50:08,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-02-19 19:50:08,820 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:50:08,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:50:08,835 INFO L225 Difference]: With dead ends: 14668 [2021-02-19 19:50:08,835 INFO L226 Difference]: Without dead ends: 13867 [2021-02-19 19:50:08,837 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13296 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=7677, Invalid=29379, Unknown=0, NotChecked=0, Total=37056 [2021-02-19 19:50:08,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13867 states. [2021-02-19 19:50:08,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13867 to 4451. [2021-02-19 19:50:08,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4451 states, 4450 states have (on average 2.3741573033707866) internal successors, (10565), 4450 states have internal predecessors, (10565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:08,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4451 states to 4451 states and 10565 transitions. [2021-02-19 19:50:08,903 INFO L78 Accepts]: Start accepts. Automaton has 4451 states and 10565 transitions. Word has length 55 [2021-02-19 19:50:08,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:50:08,903 INFO L480 AbstractCegarLoop]: Abstraction has 4451 states and 10565 transitions. [2021-02-19 19:50:08,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.1) internal successors, (105), 49 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:08,903 INFO L276 IsEmpty]: Start isEmpty. Operand 4451 states and 10565 transitions. [2021-02-19 19:50:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-02-19 19:50:08,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:50:08,906 INFO L506 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:50:09,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:09,107 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:50:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:50:09,107 INFO L82 PathProgramCache]: Analyzing trace with hash 437195463, now seen corresponding path program 89 times [2021-02-19 19:50:09,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:50:09,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831851125] [2021-02-19 19:50:09,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:50:09,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:50:09,627 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:50:09,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831851125] [2021-02-19 19:50:09,627 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076738644] [2021-02-19 19:50:09,627 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:09,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-02-19 19:50:09,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:50:09,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 19:50:09,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:50:12,066 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 83 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:50:12,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:50:12,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 26] total 40 [2021-02-19 19:50:12,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249064103] [2021-02-19 19:50:12,069 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-02-19 19:50:12,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:50:12,069 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-02-19 19:50:12,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=1355, Unknown=0, NotChecked=0, Total=1640 [2021-02-19 19:50:12,069 INFO L87 Difference]: Start difference. First operand 4451 states and 10565 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:35,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 19:50:35,990 INFO L93 Difference]: Finished difference Result 10163 states and 22443 transitions. [2021-02-19 19:50:35,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 236 states. [2021-02-19 19:50:35,992 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-02-19 19:50:35,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 19:50:36,000 INFO L225 Difference]: With dead ends: 10163 [2021-02-19 19:50:36,000 INFO L226 Difference]: Without dead ends: 10159 [2021-02-19 19:50:36,003 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 310 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32929 ImplicationChecksByTransitivity, 21.9s TimeCoverageRelationStatistics Valid=15649, Invalid=58063, Unknown=0, NotChecked=0, Total=73712 [2021-02-19 19:50:36,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10159 states. [2021-02-19 19:50:36,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10159 to 4526. [2021-02-19 19:50:36,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4526 states, 4525 states have (on average 2.3898342541436466) internal successors, (10814), 4525 states have internal predecessors, (10814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:36,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4526 states to 4526 states and 10814 transitions. [2021-02-19 19:50:36,055 INFO L78 Accepts]: Start accepts. Automaton has 4526 states and 10814 transitions. Word has length 55 [2021-02-19 19:50:36,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 19:50:36,056 INFO L480 AbstractCegarLoop]: Abstraction has 4526 states and 10814 transitions. [2021-02-19 19:50:36,056 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 19:50:36,056 INFO L276 IsEmpty]: Start isEmpty. Operand 4526 states and 10814 transitions. [2021-02-19 19:50:36,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-02-19 19:50:36,058 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 19:50:36,059 INFO L506 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 19:50:36,259 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:36,259 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 19:50:36,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 19:50:36,259 INFO L82 PathProgramCache]: Analyzing trace with hash -292313659, now seen corresponding path program 90 times [2021-02-19 19:50:36,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 19:50:36,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703211756] [2021-02-19 19:50:36,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 19:50:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 19:50:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:50:37,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703211756] [2021-02-19 19:50:37,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364037099] [2021-02-19 19:50:37,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:37,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-02-19 19:50:37,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 19:50:37,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 49 conjunts are in the unsatisfiable core [2021-02-19 19:50:37,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 19:50:39,570 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 100 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 19:50:39,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 19:50:39,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 27] total 51 [2021-02-19 19:50:39,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007371085] [2021-02-19 19:50:39,571 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-02-19 19:50:39,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 19:50:39,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-02-19 19:50:39,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=480, Invalid=2172, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 19:50:39,572 INFO L87 Difference]: Start difference. First operand 4526 states and 10814 transitions. Second operand has 52 states, 52 states have (on average 2.0961538461538463) internal successors, (109), 51 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-02-19 19:50:52,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 148 states. [2021-02-19 19:50:52,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable383,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 19:50:52,822 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 19:50:52,825 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 19:50:52,825 INFO L202 PluginConnector]: Adding new model counter-add-2-context-qQ7.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 07:50:52 BasicIcfg [2021-02-19 19:50:52,825 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 19:50:52,826 INFO L168 Benchmark]: Toolchain (without parser) took 517433.31 ms. Allocated memory was 356.5 MB in the beginning and 763.4 MB in the end (delta: 406.8 MB). Free memory was 336.5 MB in the beginning and 597.0 MB in the end (delta: -260.5 MB). Peak memory consumption was 150.2 MB. Max. memory is 16.0 GB. [2021-02-19 19:50:52,826 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 356.5 MB. Free memory was 337.6 MB in the beginning and 337.5 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:50:52,826 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.66 ms. Allocated memory is still 356.5 MB. Free memory was 335.9 MB in the beginning and 334.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 19:50:52,826 INFO L168 Benchmark]: Boogie Preprocessor took 14.90 ms. Allocated memory is still 356.5 MB. Free memory was 334.5 MB in the beginning and 333.6 MB in the end (delta: 973.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 19:50:52,826 INFO L168 Benchmark]: RCFGBuilder took 264.10 ms. Allocated memory is still 356.5 MB. Free memory was 333.5 MB in the beginning and 322.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. [2021-02-19 19:50:52,827 INFO L168 Benchmark]: TraceAbstraction took 517118.22 ms. Allocated memory was 356.5 MB in the beginning and 763.4 MB in the end (delta: 406.8 MB). Free memory was 321.9 MB in the beginning and 597.0 MB in the end (delta: -275.1 MB). Peak memory consumption was 135.5 MB. Max. memory is 16.0 GB. [2021-02-19 19:50:52,827 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 356.5 MB. Free memory was 337.6 MB in the beginning and 337.5 MB in the end (delta: 69.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.66 ms. Allocated memory is still 356.5 MB. Free memory was 335.9 MB in the beginning and 334.5 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.90 ms. Allocated memory is still 356.5 MB. Free memory was 334.5 MB in the beginning and 333.6 MB in the end (delta: 973.2 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 264.10 ms. Allocated memory is still 356.5 MB. Free memory was 333.5 MB in the beginning and 322.4 MB in the end (delta: 11.1 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 517118.22 ms. Allocated memory was 356.5 MB in the beginning and 763.4 MB in the end (delta: 406.8 MB). Free memory was 321.9 MB in the beginning and 597.0 MB in the end (delta: -275.1 MB). Peak memory consumption was 135.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 49]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 49). Cancelled while BasicCegarLoop was constructing difference of abstraction (4526states) and FLOYD_HOARE automaton (currently 148 states, 52 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 195 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 22 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 517.0s, OverallIterations: 92, TraceHistogramMax: 11, AutomataDifference: 411.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 4561 SDtfs, 35983 SDslu, 64376 SDs, 0 SdLazy, 159130 SolverSat, 10703 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 64.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 12037 GetRequests, 2592 SyntacticMatches, 61 SemanticMatches, 9383 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498720 ImplicationChecksByTransitivity, 324.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=4583occurred in iteration=82, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.9s AutomataMinimizationTime, 91 MinimizatonAttempts, 272042 StatesRemovedByMinimization, 91 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.7s SatisfiabilityAnalysisTime, 79.2s InterpolantComputationTime, 7468 NumberOfCodeBlocks, 7468 NumberOfCodeBlocksAsserted, 568 NumberOfCheckSat, 7286 ConstructedInterpolants, 0 QuantifiedInterpolants, 2793612 SizeOfPredicates, 323 NumberOfNonLiveVariables, 8530 ConjunctsInSsa, 2968 ConjunctsInUnsatCore, 182 InterpolantComputations, 2 PerfectInterpolantSequences, 3139/18073 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown